TWILIO INC, 10-Q filed on 11/14/2017
Quarterly Report
Document and Entity Information
9 Months Ended
Sep. 30, 2017
Oct. 31, 2017
Common Class A
Oct. 31, 2017
Common Class B
Entity Registrant Name
TWILIO INC 
 
 
Entity Central Index Key
0001447669 
 
 
Document Type
10-Q 
 
 
Document Period End Date
Sep. 30, 2017 
 
 
Amendment Flag
false 
 
 
Current Fiscal Year End Date
--12-31 
 
 
Entity Current Reporting Status
Yes 
 
 
Entity Filer Category
Non-accelerated Filer 
 
 
Entity Common Stock, Shares Outstanding
 
68,822,548 
24,207,167 
Document Fiscal Year Focus
2017 
 
 
Document Fiscal Period Focus
Q3 
 
 
Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Current assets:
 
 
Cash and cash equivalents
$ 91,906 
$ 305,665 
Short-term marketable securities
192,031 
Accounts receivable, net
37,258 
26,203 
Prepaid expenses and other current assets
26,420 
21,512 
Total current assets
347,615 
353,380 
Restricted cash
7,450 
7,445 
Property and equipment, net
47,718 
37,552 
Intangible assets, net
21,274 
10,268 
Goodwill
17,407 
3,565 
Other long-term assets
2,084 
484 
Total assets
443,548 
412,694 
Current liabilities:
 
 
Accounts payable
7,117 
4,174 
Accrued expenses and other current liabilities
55,283 
59,308 
Deferred revenue
13,599 
10,222 
Total current liabilities
75,999 
73,704 
Long-term liabilities
12,549 
9,543 
Total liabilities
88,548 
83,247 
Commitments and contingencies (Note 10)
   
   
Stockholders' equity:
 
 
Class A and Class B common stock
93 
87 
Additional paid-in capital
584,390 
516,090 
Accumulated deficit
(231,519)
(186,730)
Accumulated other comprehensive income
2,036 
 
Total stockholders' equity
355,000 
329,447 
Total liabilities and stockholders' equity
$ 443,548 
$ 412,694 
Condensed Consolidated Statements of Operations (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Condensed Consolidated Statements of Operations
 
 
 
 
Revenue
$ 100,542 
$ 71,533 
$ 283,784 
$ 195,383 
Cost of revenue
48,254 
31,285 
127,873 
86,315 
Gross profit
52,288 
40,248 
155,911 
109,068 
Operating expenses:
 
 
 
 
Research and development
31,674 
21,106 
87,910 
53,339 
Sales and marketing
25,778 
15,873 
73,047 
47,451 
General and administrative
18,867 
14,545 
40,810 
36,773 
Total operating expenses
76,319 
51,524 
201,767 
137,563 
Loss from operations
(24,031)
(11,276)
(45,856)
(28,495)
Other income, net
1,000 
138 
1,969 
92 
Loss before provision for income taxes
(23,031)
(11,138)
(43,887)
(28,403)
Provision for income taxes
(422)
(116)
(902)
(313)
Net loss attributable to common stockholders
$ (23,453)
$ (11,254)
$ (44,789)
$ (28,716)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)
$ (0.25)
$ (0.13)
$ (0.49)
$ (0.68)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)
92,156,768 
83,887,901 
90,543,087 
42,030,989 
Condensed Consolidated Statements of Comprehensive Loss (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Condensed Consolidated Statements of Comprehensive Loss
 
 
 
 
Net loss
$ (23,453)
$ (11,254)
$ (44,789)
$ (28,716)
Other comprehensive income:
 
 
 
 
Unrealized loss on marketable securities
(44)
 
(238)
 
Foreign currency translation
793 
 
2,274 
 
Total other comprehensive income
749 
 
2,036 
 
Comprehensive loss attributable to common stockholders
$ (22,704)
$ (11,254)
$ (42,753)
$ (28,716)
Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
 
 
Net loss
$ (44,789)
$ (28,716)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
 
 
Depreciation and amortization
13,406 
5,292 
Amortization of bond premium
153 
 
Stock-based compensation
35,973 
15,649 
Provision for doubtful accounts
407 
1,017 
Gain on lease termination
(295)
 
Write-off of internally developed software
96 
188 
Changes in operating assets and liabilities:
 
 
Accounts receivable
(9,173)
(11,275)
Prepaid expenses and other current assets
(4,947)
(11,561)
Other long-term assets
(1,512)
(59)
Accounts payable
1,411 
2,317 
Accrued expenses and other current liabilities
(1,454)
18,625 
Deferred revenue
3,364 
3,346 
Long-term liabilities
306 
9,596 
Net cash provided by (used in) operating activities
(7,054)
4,419 
CASH FLOWS FROM INVESTING ACTIVITIES:
 
 
(Increase) decrease in restricted cash
1,170 
(7,439)
Purchases of marketable securities
(280,569)
 
Maturities of marketable securities
87,325 
 
Capitalized software development costs
(12,281)
(8,447)
Purchases of property and equipment
(8,613)
(5,282)
Purchases of intangible assets
(206)
(646)
Acquisition, net of cash acquired
(22,621)
 
Net cash used in investing activities
(235,795)
(21,814)
CASH FLOWS FROM FINANCING ACTIVITIES:
 
 
Proceeds from initial public offering, net of underwriting discounts
 
160,426 
Payments of costs related to public offerings
(430)
(3,936)
Proceeds from exercises of stock options
22,504 
4,751 
Proceeds from shares issued in ESPP
7,404 
 
Tax benefit related to stock-based compensation
 
62 
Value of equity awards withheld for tax liabilities
(476)
(518)
Net cash provided by financing activities
29,002 
160,785 
Effect of exchange rate changes on cash and cash equivalents
88 
 
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS
(213,759)
143,390 
CASH AND CASH EQUIVALENTS-Beginning of period
305,665 
108,835 
CASH AND CASH EQUIVALENTS-End of period
91,906 
252,225 
Cash paid for income taxes
489 
153 
NON-CASH INVESTING AND FINANCING ACTIVITIES:
 
 
Purchases of property, equipment and intangible assets, accrued but not paid
124 
2,373 
Stock-based compensation capitalized in software development costs
2,712 
1,068 
Vesting of early exercised options
315 
512 
Costs related to the public offerings, accrued but not paid
 
$ 368 
Organization and Description of Business
Organization and Description of Business

1. Organization and Description of Business

 

Twilio Inc. (the “Company”) was incorporated in the state of Delaware on March 13, 2008. The Company is the leader in the Cloud Communications Platform category and enables developers to build, scale and operate real-time communications within their software applications via simple-to-use Application Programming Interfaces, or APIs. The power, flexibility, and reliability offered by the Company’s software building blocks empower entities of virtually every shape and size to build world-class engagement into their customer experience.

 

The Company’s headquarters are located in San Francisco, California and the Company has subsidiaries in the United Kingdom, Estonia, Ireland, Colombia, Germany, Hong Kong, Singapore, Bermuda, Spain, Sweden and Australia.

 

Summary of Significant Accounting Policies
Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

 

(a)           Basis of Presentation

 

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K filed with the SEC on February 21, 2017 (“Annual Report”).

 

The condensed consolidated balance sheet as of December 31, 2016, included herein, was derived from the audited financial statements as of that date, but may not include all disclosures including certain notes required by U.S. GAAP on an annual reporting basis.

 

In the fourth quarter of 2016, the Company adopted the guidance of Accounting Standard Update (“ASU”) No. 2016-09, “Compensation — Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting”, which simplified several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, statutory tax withholding requirements and classification in the statement of cash flows. The Company adopted all provisions on either prospective or modified retrospective basis. The impact from any of the adopted provisions was immaterial to the Company’s financial position, results of operations and cash flows. Hence, prior periods were not adjusted.

 

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2017 or any future period.

 

(b)           Principles of Consolidation

 

The condensed consolidated financial statements include the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated.

 

(c)           Use of Estimates

 

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates are used for, but not limited to, revenue allowances and returns; valuation of the Company’s stock and stock-based awards; recoverability of long-lived and intangible assets; capitalization and useful life of the Company’s capitalized internal-use software; fair value of acquired intangible assets and goodwill; accruals and contingencies. Estimates are based on historical experience and on various assumptions that the Company believes are reasonable under current circumstances. However, future events are subject to change and best estimates and judgments may require further adjustments; therefore, actual results could differ materially from those estimates. Management periodically evaluates such estimates and they are adjusted prospectively based upon such periodic evaluation.

 

(d)           Concentration of Credit Risk

 

Financial instruments that potentially expose the Company to a concentration of credit risk consist primarily of cash, cash equivalents, marketable securities, restricted cash and accounts receivable. The Company maintains cash, cash equivalents, restricted cash and marketable securities with financial institutions that management believes are financially sound and have minimal credit risk exposure.

 

The Company sells its services to a wide variety of customers. If the financial condition or results of operations of any one of the large customers deteriorate substantially, operating results could be adversely affected. To reduce credit risk, management performs ongoing credit evaluations of the financial condition of significant customers. The Company does not require collateral from its credit customers and maintains reserves for estimated credit losses on customer accounts when considered necessary. Actual credit losses may differ from the Company’s estimates. As of September 30, 2017, one customer organization represented approximately 11% of the Company’s gross accounts receivable. As of December 31, 2016, one customer organization represented approximately 16% of the Company’s gross accounts receivable.

 

In the three and nine months ended September 30, 2017, no customers represented more than 10% of the Company’s total revenue. In the three months ended September 30, 2016, one customer organization represented 15% of the Company’s total revenue, and in the nine months ended September 30, 2016, two customer organizations represented 10% and 13% of the Company’s total revenue.

 

(e)           Significant Accounting Policies

 

There have been no changes to our significant accounting policies described in our Annual Report.

 

(f)           Recently Issued Accounting Guidance, Not yet Adopted

 

In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Updates (“ASU”) 2017-09, “Compensation-Stock Compensation (Topic 718), Scope of Modification Accounting”, which clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. The guidance is effective prospectively for interim and annual periods beginning after December 15, 2017 and early adoption is permitted. The Company will adopt this guidance upon its effective date. The Company does not expect the adoption of this guidance to have any material impact on the Company’s financial position, results of operations or cash flows.

 

In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment”, which removes the second step of the goodwill impairment test that requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. This guidance is effective prospectively for interim and annual reporting periods beginning after December 15, 2019. The Company will adopt this guidance upon its effective date. The Company does not expect the adoption of this guidance to have any material impact on the Company’s financial position, results of operations or cash flows.

 

In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805) Clarifying the Definition of a Business”, which amends the guidance of FASB Accounting Standards Codification Topic 805, “Business Combinations”, adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. This guidance is effective for annual and interim periods beginning after December 15, 2017, and early adoption is permitted under certain circumstances. The Company will evaluate the impact of this guidance on its financial statements and related disclosures next time there is a potential business combination.

 

In November 2016, the FASB issued ASU 2016-18, “Restricted Cash”, which requires a statement of cash flows to explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash and restricted cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This guidance is effective for annual and interim periods beginning after December 15, 2017, and early adoption is permitted. The Company will adopt this guidance upon its effective date.  The restricted cash balances as of September 30, 2017 and December 31, 2016 were $7.4 million and $8.6 million, respectively.

 

In October 2016, the FASB issued ASU 2016-16, “Intra-Entity Transfers Other Than Inventory”, which requires entities to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This guidance is effective for annual and interim periods beginning after December 15, 2017, and early adoption is permitted. The Company will adopt this guidance upon its effective date. The Company does not expect the adoption of this guidance to have any material impact on the Company’s financial position, results of operations or cash flows.

 

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments”, which changes the impairment model for most financial assets. The new model uses a forward-looking expected loss method, which will generally result in earlier recognition of allowances for losses. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019 and early adoption is permitted for annual and interim periods beginning after December 15, 2018. The Company is evaluating the impact of this guidance on its condensed consolidated financial statements and related disclosures.

 

In February 2016, the FASB issued ASU No. 2016-02, “Leases”. The standard will affect all entities that lease assets and will require lessees to recognize a lease liability and a right-of-use asset for all leases (except for short-term leases that have a duration of less than one year) as of the date on which the lessor makes the underlying asset available to the lessee. For lessors, accounting for leases is substantially the same as in prior periods. For public companies, the new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. For leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, lessees and lessors must apply a modified retrospective transition approach. While the Company expects the adoption of this standard to result in an increase to the reported assets and liabilities, the Company has not yet determined the full impact that the adoption of this standard will have on its condensed consolidated financial statements and related disclosures.

 

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers”. This new guidance will replace most existing U.S. GAAP guidance on this topic. The new revenue recognition standard provides a unified model to determine when and how revenue is recognized. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued ASU 2015-14 which deferred, by one year, the effective date for the new revenue reporting standard for entities reporting under U.S. GAAP. In accordance with the deferral, this guidance will be effective for the Company beginning January 1, 2018 and can be applied either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. Early adoption is permitted beginning January 1, 2017. In March 2016, the FASB issued ASU 2016-08, “Revenue from Contracts with Customers, Principal versus Agent Considerations (Reporting Revenue Gross versus Net)” clarifying the implementation guidance on principal versus agent considerations. Specifically, an entity is required to determine whether the nature of a promise is to provide the specified good or service itself (that is, the entity is a principal) or to arrange for the good or service to be provided to the customer by the other party (that is, the entity is an agent). The determination influences the timing and amount of revenue recognition. In April 2016, the FASB issued ASU 2016-10, “Revenue from Contracts with Customers, Identifying Performance Obligations and Licensing,” clarifying the implementation guidance on identifying performance obligations and licensing. Specifically, the amendments reduce the cost and complexity of identifying promised goods or services and improve the guidance for determining whether promises are separately identifiable. The amendments also provide implementation guidance on determining whether an entity’s promise to grant a license provides a customer with either a right to use the entity’s intellectual property (which is satisfied at a point in time) or a right to access the entity’s intellectual property (which is satisfied over time). In May 2016, the FASB issued ASU 2016-12 “Revenue from Contracts with Customers (Topic 606), Narrow-Scope Improvements and Practical Expedients,” which amends the guidance on transition, collectability, noncash consideration and the presentation of sales and other similar taxes. ASU 2016-12 clarifies that, for a contract to be considered completed at transition, all (or substantially all) of the revenue must have been recognized under legacy GAAP. In addition, ASU 2016-12 clarifies how an entity should evaluate the collectability threshold and when an entity can recognize nonrefundable consideration received as revenue if an arrangement does not meet the standard’s contract criteria.  In September 2017, the FASB issued ASU 2017-13, “Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842)”. These amendments provide additional clarification and implementation guidance on the previously issued ASUs. These amendments do not change the core principles of the guidance stated in ASU 2014-09, instead they are intended to clarify and improve operability of certain topics included within the revenue standard. The effective date and transition requirements for ASU 2016-08, ASU 2016-10 and ASU 2016-12 are the same as the effective date and transition requirements for ASU 2014-09. The Company performed its preliminary evaluation and selected a modified retrospective transition method with cumulative effect adjustment as of the standard’s effective date. While the Company has not yet completed the full analysis, based on the evaluation to date, the Company does not expect the adoption of this guidance to have a material impact on its financial position, results of operations or cash flows.

 

Fair Value Measurements
Fair Value Measurements

3. Fair Value Measurements

 

The Company records certain of its financial assets at fair value on a recurring basis. The Company’s financial instruments, which include cash, cash equivalents, accounts receivable and accounts payable, are recorded at their carrying amounts, which approximate their fair values due to their short-term nature. Restricted cash is short-term and long-term in nature and consists of cash in a savings account, hence its carrying amount approximates its fair value. Marketable securities consist of U.S. treasury securities and high credit quality corporate debt securities. All marketable securities are considered to be available-for-sale and are recorded at their estimated fair values. Unrealized gains and losses for available-for-sale securities are recorded in other comprehensive income (loss).

 

Impairments are considered to be other than temporary if they are related to deterioration in credit risk or if it is likely that the security will be sold before the recovery of its cost basis. Realized gains and losses and declines in value deemed to be other than temporary are determined based on the specific identification method and are reported in other income (expense), net.

 

The following tables summarize the Company’s financial assets as of September 30, 2017 and December 31, 2016 by type (in thousands):

 

 

 

Amortized Cost
or Carrying

 

Net
Unrealized

 

Fair Value Hierarchy as of September 30, 2017

 

Aggregate Fair

 

 

 

Value

 

Losses

 

Level 1

 

Level 2

 

Level 3

 

Value

 

Financial Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash and cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

 

$

90,144

 

$

 

$

90,144

 

$

 

$

 

$

90,144

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total included in cash and cash equivalents

 

90,144

 

 

90,144

 

 

 

90,144

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury securities

 

59,951

 

(125

)

59,826

 

 

 

59,826

 

Corporate debt securities

 

132,318

 

(113

)

 

132,205

 

 

132,205

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total marketable securities

 

192,269

 

(238

)

59,826

 

132,205

 

 

192,031

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total financial assets

 

$

282,413

 

$

(238

)

$

149,970

 

$

132,205

 

$

 

$

282,175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

There were no marketable securities as of December 31, 2016.

 

 

 

Carrying

 

Fair Value Hierarchy as of December 31, 2016

 

Aggregate Fair

 

 

 

Value

 

Level 1

 

Level 2

 

Level 3

 

Value Total

 

Financial Assets:

 

 

 

 

 

 

 

 

 

 

 

Money market funds (included in cash and cash equivalents)

 

$

274,135

 

$

274,135

 

$

 

$

 

$

274,135

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total financial assets

 

$

274,135

 

$

274,135

 

$

 

$

 

$

274,135

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The Company classifies its marketable securities as current assets as they are available for current operating needs. The following table summarizes the contractual maturities of marketable securities as of September 30, 2017 (in thousands):

 

 

 

Amortized

 

Aggregate Fair

 

 

 

Cost

 

Value

 

Financial Assets:

 

 

 

 

 

Less than one year

 

$

121,215

 

$

121,130

 

One to two years

 

71,054

 

70,901

 

 

 

 

 

 

 

Total

 

$

192,269

 

$

192,031

 

 

 

 

 

 

 

 

 

 

For fixed income securities that had unrealized losses as of September 30, 2017, the Company has determined that no other-than-temporary impairment existed. As of September 30, 2017, all securities in an unrealized loss position have been in an unrealized loss position for less than one year.  Interest earned on marketable securities in the three and nine months ended September 30, 2017 was $0.7 million and $1.8 million, respectively, and is recorded as other income (expense), net, in the accompanying condensed consolidated statements of operations.

 

Property and Equipment
Property and Equipment

4. Property and Equipment

 

Property and equipment consisted of the following (in thousands):

 

 

 

As of
September 30,
2017

 

As of
December 31,
2016

 

 

 

 

 

 

 

Capitalized software development costs

 

$

43,571

 

$

28,661

 

Leasehold improvements

 

14,208

 

14,063

 

Office equipment

 

9,263

 

5,729

 

Furniture and fixtures

 

1,902

 

1,576

 

Software

 

1,500

 

968

 

 

 

 

 

 

 

Total property and equipment

 

70,444

 

50,997

 

Less: accumulated depreciation and amortization

 

(22,726

)

(13,445

)

 

 

 

 

 

 

Total property and equipment, net

 

$

47,718

 

$

37,552

 

 

 

 

 

 

 

 

 

 

Depreciation and amortization expense was $3.4 million and $9.3 million for the three and nine months ended September 30, 2017, respectively, and $1.9 million and $4.9 million for the three and nine months ended September 30, 2016, respectively.

 

The Company capitalized $5.5 million and $15.0 million of software development costs in the three and nine months ended September 30, 2017, respectively, and $3.4 million and $9.5 million in the three and nine months ended September 30, 2016, respectively. Of this amount, the stock-based compensation expense was $1.2 million and $2.8 million in the three and nine months ended September 30, 2017, respectively, and $0.4 million and $1.1 million in the three and nine months ended September 30, 2016, respectively.

 

Amortization of capitalized software development costs was $2.2 million and $5.9 million in the three and nine months ended September 30, 2017, respectively, and $1.4 million and $3.7 million in the three and nine months ended September 30, 2016, respectively.

 

Recent Acquisition
Recent Acquisition

5. Recent Acquisition

 

On February 6, 2017, the Company completed its acquisition of a messaging provider based in Sweden specializing in messaging and SMS solutions, for a total purchase price of $23.0 million, paid in cash, of which $5.0 million was held in escrow.  The escrow will continue for 18 months after the transaction closing date and may be extended under certain circumstances.

 

Additionally, the Company deposited $2.0 million into a separate escrow account that will be released to certain employees on the first and second anniversaries of the closing date, provided the underlying service conditions are met. This amount is recorded as prepaid compensation in the accompanying condensed consolidated balance sheet and is amortized into expense as the services are rendered.

 

The acquisition was accounted for as a business combination and, accordingly, the total purchase price was allocated to the preliminary net tangible and intangible assets and liabilities based on their preliminary fair values on the acquisition date. The prepaid compensation subject to service conditions is accounted for as a post-acquisition compensation expense and recorded as research and development expense in the accompanying condensed consolidated statement of operations. We expect to continue to obtain information to assist us in determining the fair values of the net assets acquired on the acquisition date during the measurement period.

 

The acquired entity’s results of operations have been included in the condensed consolidated financial statements of the Company from the date of acquisition.

 

The following table presents the preliminary purchase price allocation recorded in the Company’s condensed consolidated balance sheet on the acquisition date, and as subsequently adjusted during the three months ended June 30, 2017 (in thousands):

 

 

 

Total

 

Net tangible liabilities

 

$

(3,326

)

Goodwill(1)

 

12,588

 

Intangible assets(2)

 

13,700

 

 

 

 

 

Total purchase price

 

$

22,962

 

 

 

 

 

 

 

The Company acquired a net deferred tax liability of $2.6 million in this business combination.

 

 

(1)

Goodwill represents the excess of purchase price over the fair value of identifiable tangible and intangible assets acquired and liabilities assumed. The goodwill in this transaction is primarily attributable to the future cash flows to be realized from the acquired technology platform, existing customer and supplier relationships as well as operational synergies.

 

(2)

Identifiable finite-lived intangible assets were comprised of the following:

 

 

 

Total

 

Estimated
life
(in years)

 

Developed technology

 

$

5,000

 

4

 

Customer relationships

 

6,100

 

7-8

 

Supplier relationships

 

2,600

 

5

 

 

 

 

 

 

 

Total intangible assets acquired

 

$

13,700

 

 

 

 

 

 

 

 

 

 

 

The estimated fair value of the intangible assets acquired was determined by the Company, and the Company considered or relied in part upon a valuation report of a third-party expert. The Company used income approaches to estimate the fair values of the identifiable intangible assets.  Specifically, the developed technology asset class was valued using the-relief-from royalty method, while the customer relationships asset class was valued using a multi-period excess earnings method and the supplier relationships asset class was valued using an incremental cash flow method.

 

The Company incurred costs related to this acquisition of $0.7 million, of which $0.3 million and $0.4 million were incurred during the fiscal years 2017 and 2016, respectively. All acquisition related costs were expensed as incurred and have been recorded in general and administrative expenses in the accompanying condensed consolidated statements of operations.

 

Pro forma results of operations for this acquisition have not been presented as the financial impact to the Company’s condensed consolidated financial statements is immaterial.

 

Intangible Assets
Intangible Assets

6. Intangible Assets

 

Goodwill

 

Goodwill balance as of September 30, 2017 and December 31, 2016 was as follows:

 

 

Total

 

Balance as of December 31, 2016

 

$

3,565

 

Goodwill recorded in connection with the recent acquisition

 

12,688

 

Measurement period adjustment

 

(100

)

Effect of exchange rate

 

1,254

 

 

 

 

 

Balance as of September 30, 2017

 

$

17,407

 

 

 

 

 

 

 

Intangible assets

 

Intangible assets consisted of the following (in thousands):

 

 

 

As of September 30, 2017

 

 

 

Gross

 

Accumulated
Amortization

 

Net

 

Amortizable intangible assets:

 

 

 

 

 

 

 

Developed technology

 

$

14,888

 

$

(4,365

)

$

10,523

 

Customer relationships

 

7,096

 

(774

)

6,322

 

Supplier relationships

 

2,854

 

(364

)

2,490

 

Trade name

 

60

 

(60

)

 

Patent

 

1,737

 

(93

)

1,644

 

 

 

 

 

 

 

 

 

Total amortizable intangible assets

 

26,635

 

(5,656

)

20,979

 

 

 

 

 

 

 

 

 

Non-amortizable intangible assets:

 

 

 

 

 

 

 

Domain names

 

32

 

 

32

 

Trademarks

 

263

 

 

263

 

 

 

 

 

 

 

 

 

Total

 

$

26,930

 

$

(5,656

)

$

21,274

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

As of December 31, 2016

 

 

 

Gross

 

Accumulated
Amortization

 

Net

 

Amortizable intangible assets:

 

 

 

 

 

 

 

Developed technology

 

$

9,400

 

$

(1,140

)

$

8,260

 

Customer relationships

 

400

 

(148

)

252

 

Trade name

 

60

 

(56

)

4

 

Patent

 

1,512

 

(55

)

1,457

 

 

 

 

 

 

 

 

 

Total amortizable intangible assets

 

11,372

 

(1,399

)

9,973

 

 

 

 

 

 

 

 

 

Non-amortizable intangible assets:

 

 

 

 

 

 

 

Domain names

 

32

 

 

32

 

Trademarks

 

263

 

 

263

 

 

 

 

 

 

 

 

 

Total

 

$

11,667

 

$

(1,399

)

$

10,268

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortization expense was $1.5 million and $4.2 million for the three and nine months ended September 30, 2017, respectively, and $0.1 million and $0.4 million for the three and nine months ended September 30, 2016, respectively.

 

Total estimated future amortization expense was as follows (in thousands):

 

 

 

As of
September 30,
2017

 

2017 (remaining 3 months)

 

$

2,659

 

2018

 

5,483

 

2019

 

5,081

 

2020

 

2,651

 

2021

 

1,518

 

Thereafter

 

3,587

 

 

 

 

 

Total

 

$

20,979

 

 

 

 

 

 

 

Accrued Expenses and Other Liabilities
Accrued Expenses and Other Liabilities

7. Accrued Expenses and Other Liabilities

 

Accrued expenses and other current liabilities consisted of the following (in thousands):

 

 

As of
September 30,

 

As of
December 31,

 

 

 

2017

 

2016

 

Accrued payroll and related

 

$

5,408

 

$

3,133

 

Accrued bonus and commission

 

3,204

 

2,251

 

Accrued cost of revenue

 

11,553

 

8,741

 

Sales and other taxes payable

 

19,394

 

28,795

 

ESPP contributions

 

3,574

 

4,364

 

Deferred rent

 

668

 

1,250

 

Accrued other expense

 

11,482

 

10,774

 

 

 

 

 

 

 

Total accrued expenses and other current liabilities

 

$

55,283

 

$

59,308

 

 

 

 

 

 

 

 

 

 

Long-term liabilities consisted of the following (in thousands):

 

 

 

As of
September 30,

 

As of
December 31,

 

 

 

2017

 

2016

 

Deferred rent

 

$

9,335

 

$

9,387

 

Deferred tax liability

 

2,780

 

 

Accrued other expense

 

434

 

156

 

 

 

 

 

 

 

Total other long-term liabilities

 

$

12,549

 

$

9,543

 

 

 

 

 

 

 

 

 

 

Supplemental Balance Sheet Information
Supplemental Balance Sheet Information

8. Supplemental Balance Sheet Information

 

A roll-forward of the Company’s reserves is as follows (in thousands):

 

(a)   Allowance for doubtful accounts (in thousands):

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Balance, beginning of period

 

$

923

 

$

795

 

$

1,076

 

$

486

 

Additions

 

125

 

170

 

407

 

1,017

 

Write-offs

 

 

(16

)

(435

)

(554

)

 

 

 

 

 

 

 

 

 

 

Balance, end of period

 

$

1,048

 

$

949

 

$

1,048

 

$

949

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(b)   Sales credit reserve (in thousands):

 

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Balance, beginning of period

 

$

734

 

$

652

 

$

544

 

$

714

 

Additions

 

104

 

169

 

1,076

 

1,012

 

Deductions against reserve

 

(238

)

(337

)

(1,020

)

(1,242

)

 

 

 

 

 

 

 

 

 

 

Balance, end of period

 

$

600

 

$

484

 

$

600

 

$

484

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Revenue by Geographic Area
Revenue by Geographic Area

9. Revenue by Geographic Area

 

Revenue by geographic area is based on the IP address at the time of registration. The following table sets forth revenue by geographic area (dollars in thousands):

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Revenue by geographic area:

 

 

 

 

 

 

 

 

 

United States

 

$

76,713

 

$

60,535

 

$

221,914

 

$

165,528

 

International

 

23,829

 

10,998

 

61,870

 

29,855

 

 

 

 

 

 

 

 

 

 

 

Total

 

$

100,542

 

$

71,533

 

$

283,784

 

$

195,383

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Percentage of revenue by geographic  area:

 

 

 

 

 

 

 

 

 

United States

 

76

%

85

%

78

%

85

%

International

 

24

%

15

%

22

%

15

%

 

Commitments and Contingencies
Commitments and Contingencies

10. Commitments and Contingencies

 

(a)           Lease Commitments

 

The Company entered into various non-cancelable operating lease agreements for its facilities over the next seven years. Certain operating leases contain provisions under which monthly rent escalates over time. When lease agreements contain escalating rent clauses or free rent periods, the Company recognizes rent expense on a straight-line basis over the term of the lease.

 

Rent expense was $2.1 million and $6.1 million for the three and nine months ended September 30, 2017, respectively, and $2.1 million and $5.1 million for the three and nine months ended September 30, 2016, respectively.

 

Future minimum lease payments under non-cancelable operating leases were as follows (in thousands):

 

Year Ending December 31:

 

As of September 30,
2017

 

2017 (remaining three months)

 

$

1,958

 

2018

 

7,326

 

2019

 

7,375

 

2020

 

7,068

 

2021

 

7,033

 

Thereafter

 

16,052

 

 

 

 

 

Total minimum lease payments

 

$

46,812

 

 

 

 

 

 

 

(b)           Legal Matters

 

On April 30, 2015, Telesign Corporation, or Telesign, filed a lawsuit against the Company in the United States District Court, Central District of California (“Telesign I”). Telesign alleges that the Company is infringing three U.S. patents that it holds: U.S. Patent No. 8,462,920 (“‘920”), U.S. Patent No. 8,687,038 (“‘038”) and U.S. Patent No. 7,945,034 (“‘034”). The patent infringement allegations in the lawsuit relate to the Company’s Programmable Authentication products, its two-factor authentication use case and an API tool to find information about a phone number. The Company has petitioned the U.S. Patent and Trademark Office (“U.S. PTO”) for inter partes review of the patents at issue. On July 8, 2016, the U.S. PTO denied the Company’s petition for inter partes review of the ‘920 and ‘038 patents. After the U.S. PTO held its hearing on the ‘034 patent inter partes review, on June 26, 2017, it upheld the patentability of the ‘034 patent, adopting Telesign’s narrow construction of its patent.

 

On March 28, 2016, Telesign filed a second lawsuit against the Company in the United States District Court, Central District of California (“Telesign II”), alleging infringement of U.S. Patent No. 9,300,792 (“‘792”) held by Telesign. The ‘792 patent is in the same patent family as the ‘920 and ‘038 patents asserted in Telesign I. On March 8, 2017, in response to a petition by the Company,  the U.S. PTO issued an order instituting the inter partes review for the ‘792 patent. A final written decision is expected by March 2018.  On March 15, 2017, Twilio filed a motion to consolidate and stay related cases pending the conclusion of the now instituted ‘792 patent inter partes review. On May 16, 2017, the court issued an order to consolidate the Telesign I and Telesign II matters and stay the consolidated case until the completion of the inter partes review of the ‘792 patent. With respect to each of the patents asserted in Telesign I and Telesign II, the complaints seek, among other things, to enjoin the Company from allegedly infringing the patents, along with damages for lost profits.

 

On December 1, 2016, the Company filed a patent infringement lawsuit against Telesign in the United States District Court, Northern District of California, alleging indirect infringement of United States Patent No. 8,306,021, United States Patent No. 8,837,465, United States Patent No. 8,755,376, United States Patent No. 8,736,051, United States Patent No. 8,737,962, United States Patent No. 9,270,833, and United States Patent No. 9,226,217. Telesign filed a motion to dismiss the complaint on January 25, 2017.  In two orders, issued on March 31, 2017 and April 17, 2017, the Court granted Telesign’s motion to dismiss with respect to the ‘962, ‘833, ‘051 and ‘217 patents, but denied Telesign’s motion to dismiss as to the ‘021, ‘465 and ‘376 patents. This litigation is currently ongoing.

 

On February 18, 2016, a putative class action complaint was filed in the Alameda County Superior Court in California, entitled Angela Flowers v. Twilio Inc. The complaint alleges that the Company’s products permit the interception, recording and disclosure of communications at a customer’s request and are in violation of the California Invasion of Privacy Act. The complaint seeks injunctive relief as well as monetary damages. On May 27, 2016, the Company filed a demurrer to the complaint. On August 2, 2016, the court issued an order denying the demurrer in part and granted it in part, with leave to amend by August 18, 2016 to address any claims under California’s Unfair Competition Law. The plaintiff opted not to amend the complaint. Discovery has already begun,  and a hearing on the class certification motion is set for December 2017.

 

The Company intends to vigorously defend these lawsuits and believes it has meritorious defenses to each matter in which it is a defendant. It is too early in these matters to reasonably predict the probability of the outcomes or to estimate ranges of possible losses.

 

In addition to the litigation matters discussed above, from time to time, the Company is a party to legal action and subject to claims that arise in the ordinary course of business. The claims are investigated as they arise and loss estimates are accrued, when probable and reasonably estimable. While it is not feasible to predict or determine the ultimate outcome of these matters, the Company believes that these legal proceedings will not have a material adverse effect on its financial position or results of operations.

 

(c)           Indemnification Agreements

 

The Company has signed indemnification agreements with all of its board members and executive officers. The agreements indemnify the board members and executive officers from claims and expenses on actions brought against the individuals separately or jointly with the Company for certain indemnifiable events. Indemnifiable Events generally mean any event or occurrence related to the fact that the board member or the executive officer was or is acting in his or her capacity as a board member or an executive officer for the Company or was or is acting or representing the interests of the Company.

 

In the ordinary course of business, the Company enters into contractual arrangements under which it agrees to provide indemnification of varying scope and terms to business partners and other parties with respect to certain matters, including, but not limited to, losses arising out of the breach of such agreements, intellectual property infringement claims made by third parties and other liabilities relating to or arising from the Company’s various products, or its acts or omissions. In these circumstances, payment may be conditional on the other party making a claim pursuant to the procedures specified in the particular contract. Further, the Company’s obligations under these agreements may be limited in terms of time and/or amount, and in some instances, the Company may have recourse against third parties for certain payments. The terms of such obligations may vary.

 

As of September 30, 2017 and December 31, 2016, no amounts were accrued.

 

(d)           Other taxes

 

The Company conducts operations in many tax jurisdictions throughout the United States. In many of these jurisdictions, non-income-based taxes, such as sales and use and telecommunications taxes are assessed on the Company’s operations. Prior to March 2017, the Company had not billed nor collected these taxes from its customers and, in accordance with U.S. GAAP, recorded a provision for its tax exposure in these jurisdictions when it is both probable that a liability has been incurred and the amount of the exposure can be reasonably estimated. Effective March 2017, the Company began collecting these taxes from customers in certain jurisdictions and intends to collect in other jurisdictions in the near term. As a result, the Company recorded a liability of $29.0 million and $28.8 million as of March 31, 2017 and December 31, 2016, respectively. These estimates include several key assumptions including, but not limited to, the taxability of the Company’s services, the jurisdictions in which its management believes it has nexus, and the sourcing of revenues to those jurisdictions. Simultaneously, the Company was and continues to be in discussions with certain states regarding its prior state sales and other taxes, if any, that the Company may owe.

 

During the three months ended June 30, 2017, the Company revised its estimates of its tax exposure based on settlements reached with various states indicating that certain revisions to the key assumptions including, but not limited to, the sourcing of revenue and the taxability of the Company’s services were appropriate in the current period. In the nine months ended September 30, 2017, total impact of these changes on the net loss attributable to common stockholders was a reduction of $13.1 million, or $0.14 per share. As of September 30, 2017, the total liability related to these taxes was $19.4 million.

 

In the event other jurisdictions challenge management’s assumptions and analysis, the actual exposure could differ materially from the current estimates.

 

Stockholders' Equity
Stockholders' Equity

11. Stockholders’ Equity

 

(a)          Preferred Stock

 

As of September 30, 2017, the Company had authorized 100,000,000 shares of preferred stock, par value $0.001, of which no shares were issued and outstanding.

 

(b)          Common Stock

 

As of September 30, 2017 and December 31, 2016, the Company had authorized 1,000,000,000 shares of Class A common stock and 100,000,000 shares of Class B common stock, each par value $0.001 per share.  As of September 30, 2017, 68,671,207 shares of Class A common stock and 24,248,777 shares of Class B common stock were issued and outstanding. As of December 31, 2016, 49,996,410 shares of Class A common stock and 37,252,138 shares of Class B common stock were issued and outstanding.

 

The Company had reserved shares of common stock for issuance as follows:

 

 

 

As of
September 30,

 

As of
December 31,

 

 

 

2017

 

2016

 

Stock options issued and outstanding

 

11,380,189

 

14,649,276

 

Nonvested restricted stock units issued and outstanding

 

4,384,898

 

2,034,217

 

Class A common stock reserved for Twilio.org

 

680,397

 

680,397

 

Stock-based awards available for grant under 2016 Plan

 

11,601,980

 

10,143,743

 

Class A common stock reserved for issuance under 2016 ESPP

 

224,126

 

597,038

 

 

 

 

 

 

 

Total

 

28,271,590

 

28,104,671

 

 

 

 

 

 

 

 

Stock-Based Compensation
Stock-Based Compensation

12. Stock-Based Compensation

 

2008 Stock Option Plan

 

The Company granted options under its 2008 Stock Option Plan (the “2008 Plan”), as amended and restated, until June 22, 2016, when the plan was terminated in connection with the Company’s IPO. Accordingly, no shares are available for future issuance under the 2008 Plan.  The 2008 Plan continues to govern outstanding equity awards granted thereunder.

 

2016 Stock Option Plan

 

The Company’s 2016 Stock Option and Incentive Plan (the “2016 Plan”) became effective on June 21, 2016. The 2016 Plan provides for the grant of ISOs, NSOs, restricted stock, RSUs, stock appreciation rights, unrestricted stock awards, performance share awards, dividend equivalent rights and cash-based awards to employees, directors and consultants of the Company. A total of 11,500,000 shares of the Company’s Class A common stock were initially reserved for issuance under the 2016 Plan. These available shares automatically increase each January 1, beginning on January 1, 2017, by 5% of the number of shares of the Company’s Class A and Class B common stock outstanding on the immediately preceding December 31, or such lesser number of shares as determined by the Company’s compensation committee. On January 1, 2017, the shares available for grant under the 2016 Plan were automatically increased by 4,362,427 shares.

 

Under the 2016 Plan, the stock options are granted at a price per share not less than 100% of the fair market value per share of the underlying common stock on the date of grant. Under both plans, stock options generally expire 10 years from the date of grant and vest over periods determined by the board of directors. The vesting period for new-hire options and restricted stock units is generally a four-year term from the date of grant, at a rate of 25% after one year, then monthly or quarterly, respectively, on a straight-line basis thereafter. In July 2017, the Company began granting restricted stock units to existing employees that vest in equal quarterly installments over a four year service period.

 

2016 Employee Stock Purchase Plan

 

The Company’s Employee Stock Purchase Plan (“2016 ESPP”) became effective on June 21, 2016. A total of 2,400,000 shares of the Company’s Class A common stock were initially reserved for issuance under the 2016 ESPP. These available shares automatically increase each January 1, beginning on January 1, 2017, by the lesser of 1,800,000 shares of the common stock, 1% of the number of shares of the Company’s Class A and Class B common stock outstanding on the immediately preceding December 31 or such lesser number of shares as determined by the Company’s compensation committee. On January 1, 2017, the shares available for grant under the 2016 Plan were automatically increased by 872,485 shares.

 

The 2016 ESPP allows eligible employees to purchase shares of the Company’s Class A common stock at a discount of up to 15% through payroll deductions of their eligible compensation, subject to any plan limitations. Except for the initial offering period, the 2016 ESPP provides for separate six-month offering periods beginning in May and November of each fiscal year, starting in May 2017.

 

On each purchase date, eligible employees will purchase the Company’s stock at a price per share equal to 85% of the lesser of (i) the fair market value of the Company’s Class A common stock on the offering date or (ii) the fair market value of the Company’s Class A common stock on the purchase date.

 

In the three months ended June 30, 2017, 580,705 shares of the Company’s Class A common stock were purchased under the 2016 ESPP and 224,126 shares are expected to be purchased in the fourth quarter of 2017.

 

As of September 30, 2017, total unrecognized compensation cost related to the 2016 ESPP was $0.3 million, which will be amortized over a weighted-average period of 0.13 years.

 

Stock option activity under the 2008 Plan and the 2016 Plan during the nine months ended September 30, 2017 was as follows:

 

Stock Options

 

 

 

Number of
options
outstanding

 

Weighted-
average
exercise
price
(per
share)

 

Weighted-
average
remaining
contractual
term
(in years)

 

Aggregate
intrinsic
value
(in
thousands)

 

Outstanding options as of December 31, 2016

 

14,649,276

 

$

6.14

 

7.52

 

$

332,716

 

Granted

 

1,443,335

 

31.06

 

 

 

 

 

Exercised

 

(4,615,225

)

4.88

 

 

 

 

 

Forfeited and cancelled

 

(652,197

)

7.93

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outstanding options as of September 30, 2017

 

10,825,189

 

$

9.89

 

7.37

 

$

218,574

 

 

 

 

 

 

 

 

 

 

 

 

 

Options vested and exercisable as of September 30, 2017

 

5,166,349

 

$

5.30

 

6.54

 

$

126,828

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Aggregate intrinsic value represents the difference between the fair value of the Company’s common stock and the exercise price of outstanding “in-the-money” options. Prior to the IPO, the fair value of the Company’s common stock was estimated by the Company’s board of directors. After the IPO, the fair value of the Company’s common stock is the Company’s Class A common stock price as reported on the New York Stock Exchange. The aggregate intrinsic value of stock options exercised was $18.6 million and $119.3 million for the three and nine months ended September 30, 2017, respectively, and $4.4 million and $15.7 million for the three and nine months ended September 30, 2016, respectively.

 

The total estimated grant date fair value of options vested was $3.0 million and $12.2 million for the three and nine months ended September 30, 2017, respectively, and $4.9 million and $11.4 million for the three and nine months ended September 30, 2016, respectively. No options were granted in the three months ended September 30, 2017 and 2016. The weighted-average grant-date fair value of options granted in the nine months ended September 30, 2017 and 2016 was $13.48 and $5.52, respectively.

 

On February 28, 2017, the Company granted a total of 555,000 shares of performance-based stock options in three distinct awards to an employee with grant date fair values of $13.48, $10.26 and $8.41 per share for a total grant value of $5.9 million.  The first half of each award vests upon satisfaction of a performance condition and the remainder vests thereafter in equal monthly installments over a 24-month period.  The achievement window expires after 4.3 years from the date of grant and the stock options expire seven years after the date of grant.  The stock options are amortized over a derived service period of three years, 4.25 years and 4.75 years, respectively.  The stock options value and the derived service period were estimated using the Monte-Carlo simulation model. The following table summarizes the details of the performance options:

 

 

 

Number of
options
outstanding

 

Weighted-
average
exercise
price
(per
share)

 

Weighted-
average
remaining
contractual
term
(in years)

 

Aggregate
intrinsic
value
(in
thousands)

 

Outstanding options as of December 31, 2016

 

 

$

 

 

$

 

Granted

 

555,000

 

31.72

 

 

 

 

 

Exercised

 

 

 

 

 

 

 

Forfeited and cancelled

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outstanding options as of September 30, 2017

 

555,000

 

$

31.72

 

6.41

 

$

 

 

 

 

 

 

 

 

 

 

 

 

 

Options vested and exercisable as of September 30, 2017

 

 

$

 

 

$

 

 

 

 

 

 

 

 

 

 

 

 

 

 

As of September 30, 2017, total unrecognized compensation cost related to all non-vested stock options was $38.6 million, which will be amortized over a weighted-average period of 2.2 years.

 

Restricted Stock Units

 

 

 

Number of
awards
outstanding

 

Weighted-
average
grant date
fair value
(per
share)

 

Aggregate
intrinsic
value
(in
thousands)

 

Nonvested RSUs as of December 31, 2016

 

2,034,217

 

$

32.66

 

$

58,687

 

Granted

 

3,093,326

 

 

 

 

 

Vested

 

(492,757

)

 

 

 

 

Forfeited and cancelled

 

(249,888

)

 

 

 

 

 

 

 

 

 

 

 

 

Nonvested RSUs as of September 30, 2017

 

4,384,898

 

$

30.86

 

$

130,818

 

 

 

 

 

 

 

 

 

 

 

 

As of September 30, 2017, total unrecognized compensation cost related to nonvested RSUs was $121.1 million, which will be amortized over a weighted-average period of 3.26 years.

 

Equity Awards Granted to Nonemployees

 

In September 2016, the Company granted 30,255 restricted stock units to a nonemployee. The award is vested upon the satisfaction of a service condition over two years starting in August 2015. The stock-based compensation expense recorded for this award during the three and nine months ended September 30, 2017 was $0.1 million and $0.3 million, respectively.

 

As of September 30, 2017, there were no nonemployee awards outstanding.

 

Early Exercises of Nonvested Options

 

As of September 30, 2017 and December 31, 2016, the Company recorded a liability of $0.1 million and $0.3 million for 16,033 and 49,580 unvested shares, respectively, that were early exercised by employees and were subject to repurchase at the respective period end. These amounts are reflected in current and non-current liabilities on the Company’s consolidated balance sheets.

 

Valuation Assumptions

 

The fair value of employee stock options under our equity incentive plans and purchase rights under the ESPP was estimated on the date of grant using the following assumptions in the Black-Scholes option pricing model:

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Employee Stock Options:

 

 

 

 

 

 

 

 

 

Fair value of common stock

 

*

 

*

 

$24.77 -$31.96

 

$10.09-$15.00

 

Expected term (in years)

 

*

 

*

 

6.08

 

6.08

 

Expected volatility

 

*

 

*

 

46.1%-47.6%

 

51.4%-53.0%

 

Risk-free interest rate

 

*

 

*

 

1.9%-2.1%

 

1.3%-1.5%

 

Dividend rate

 

*

 

*

 

0%

 

0%

 

 

 

*No stock options were granted in the period.

 

Employee Stock Purchase Plan:

 

 

 

 

 

 

 

 

 

Expected term (in years)

 

0.5

 

0.9

 

0.5

 

0.9

 

Expected volatility

 

33.2

%

52

%

33.2

%

52

%

Risk-free interest rate

 

1.1

%

0.6

%

1.1

%

0.6

%

Dividend rate

 

0

%

0

%

0

%

0

%

 

The following assumptions were used in the Monte Carlo simulation model to estimate the fair value and the derived service period of the performance options:

 

Asset volatility

 

40

%

Equity volatility

 

45

%

Discount rate

 

14

%

Stock price at grant date

 

$

31.72

 

 

Stock-Based Compensation Expense

 

The Company recorded total stock-based compensation expense as follows (in thousands):

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Cost of revenue

 

$

180

 

$

84

 

$

460

 

$

135

 

Research and development

 

6,493

 

3,741

 

16,687

 

7,636

 

Sales and marketing

 

2,603

 

1,432

 

6,961

 

3,282

 

General and administrative

 

4,912

 

2,391

 

11,865

 

4,596

 

 

 

 

 

 

 

 

 

 

 

Total

 

$

14,188

 

$

7,648

 

$

35,973

 

$

15,649

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Net Loss per Share Attributable to Common Stockholders
Net Loss per Share Attributable to Common Stockholders

13. Net Loss per Share Attributable to Common Stockholders

 

Basic and diluted net loss per common share is presented in conformity with the two-class method required for participating securities.

 

Class A and Class B common stock are the only outstanding equity in the Company. The rights of the holders of Class A and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to ten votes per share. Shares of Class B common stock may be converted into Class A common stock at any time at the option of the stockholder, and are automatically converted into Class A common stock upon sale or transfer, subject to certain limited exceptions.

 

Basic net loss per share attributable to common stockholders is computed using the weighted-average number of common shares outstanding during the period. Diluted net loss per share attributable to common stockholders is computed using the weighted-average number of common shares and, if dilutive, potential common shares outstanding during the period. The dilutive effect of these potential common shares is reflected in diluted earnings per share by application of the treasury stock method.

 

The following table sets forth the calculation of basic and diluted net loss per share attributable to common stockholders during the periods presented (in thousands, except share and per share data):

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Net loss attributable to common stockholders

 

$

(23,453

)

$

(11,254

)

$

(44,789

)

$

(28,716

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted-average shares used to compute basic and diluted net loss per share attributable to common stockholders

 

92,156,768

 

83,887,901

 

90,543,087

 

42,030,989

 

 

 

 

 

 

 

 

 

 

 

Net loss per share attributable to common stockholders, basic and diluted

 

$

(0.25

)

$

(0.13

)

$

(0.49

)

$

(0.68

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The following outstanding shares of common stock equivalents were excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would have been anti-dilutive:

 

 

 

As of September 30,

 

 

 

2017

 

2016

 

 

 

 

 

 

 

Issued and outstanding options

 

11,380,189

 

16,476,973

 

Nonvested RSUs issued and outstanding

 

4,384,898

 

1,639,378

 

Common stock reserved for Twilio.org

 

680,397

 

780,397

 

Shares committed under 2016 ESPP

 

224,126

 

604,865

 

Unvested shares subject to repurchase

 

16,033

 

74,451

 

 

 

 

 

 

 

Total

 

16,685,643

 

19,576,064

 

 

 

 

 

 

 

 

Transactions with Investors
Transactions with Investors

14. Transactions with Investors

 

In 2015, two of the Company’s vendors participated in the Company’s Series E convertible preferred stock financing and owned approximately 1.9% and 1.0%, respectively, of the Company’s outstanding common stock as of September 30, 2017, and 2.0% and 1.0%, respectively, of the Company’s outstanding common stock as of December 31, 2016. The amount of software services the Company purchased from the first vendor was $5.3 million and $14.7 million for the three and nine months ended September 30, 2017, respectively, and $3.7 million and $10.3 million during the three and nine months ended September 30, 2016, respectively. The net amount due to this vendor as of September 30, 2017 was $1.9 million.  The amounts due to or from this vendor as of December 31, 2016 were insignificant.

 

The amount of services the Company purchased from the second vendor was $0.2 million and $0.6 million for the three and nine months ended September 30, 2017, respectively, and $0.1 million and $0.3 million for the three and nine months ended September 30, 2016, respectively. The net amounts due from this vendor as of September 30, 2017 and December 31, 2016 were insignificant.

 

Employee Benefit Plan
Employee Benefit Plan

15. Employee Benefit Plan

 

The Company sponsors a 401(k) defined contribution plan covering all employees. The employer contribution to the plan was $0.3 million and $1.6 million in the three and nine months ended September 30, 2017, respectively, and $0.2 million and $0.9 million in the three and nine months ended September 30, 2016, respectively

 

Summary of Significant Accounting Policies (Policies)

(a)           Basis of Presentation

 

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K filed with the SEC on February 21, 2017 (“Annual Report”).

 

The condensed consolidated balance sheet as of December 31, 2016, included herein, was derived from the audited financial statements as of that date, but may not include all disclosures including certain notes required by U.S. GAAP on an annual reporting basis.

 

In the fourth quarter of 2016, the Company adopted the guidance of Accounting Standard Update (“ASU”) No. 2016-09, “Compensation — Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting”, which simplified several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, statutory tax withholding requirements and classification in the statement of cash flows. The Company adopted all provisions on either prospective or modified retrospective basis. The impact from any of the adopted provisions was immaterial to the Company’s financial position, results of operations and cash flows. Hence, prior periods were not adjusted.

 

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2017 or any future period.

 

(b)           Principles of Consolidation

 

The condensed consolidated financial statements include the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated.

 

(c)           Use of Estimates

 

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates are used for, but not limited to, revenue allowances and returns; valuation of the Company’s stock and stock-based awards; recoverability of long-lived and intangible assets; capitalization and useful life of the Company’s capitalized internal-use software; fair value of acquired intangible assets and goodwill; accruals and contingencies. Estimates are based on historical experience and on various assumptions that the Company believes are reasonable under current circumstances. However, future events are subject to change and best estimates and judgments may require further adjustments; therefore, actual results could differ materially from those estimates. Management periodically evaluates such estimates and they are adjusted prospectively based upon such periodic evaluation.

 

(d)           Concentration of Credit Risk

 

Financial instruments that potentially expose the Company to a concentration of credit risk consist primarily of cash, cash equivalents, marketable securities, restricted cash and accounts receivable. The Company maintains cash, cash equivalents, restricted cash and marketable securities with financial institutions that management believes are financially sound and have minimal credit risk exposure.

 

The Company sells its services to a wide variety of customers. If the financial condition or results of operations of any one of the large customers deteriorate substantially, operating results could be adversely affected. To reduce credit risk, management performs ongoing credit evaluations of the financial condition of significant customers. The Company does not require collateral from its credit customers and maintains reserves for estimated credit losses on customer accounts when considered necessary. Actual credit losses may differ from the Company’s estimates. As of September 30, 2017, one customer organization represented approximately 11% of the Company’s gross accounts receivable. As of December 31, 2016, one customer organization represented approximately 16% of the Company’s gross accounts receivable.

 

In the three and nine months ended September 30, 2017, no customers represented more than 10% of the Company’s total revenue. In the three months ended September 30, 2016, one customer organization represented 15% of the Company’s total revenue, and in the nine months ended September 30, 2016, two customer organizations represented 10% and 13% of the Company’s total revenue.

 

(e)           Significant Accounting Policies

 

There have been no changes to our significant accounting policies described in our Annual Report.

 

(f)           Recently Issued Accounting Guidance, Not yet Adopted

 

In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Updates (“ASU”) 2017-09, “Compensation-Stock Compensation (Topic 718), Scope of Modification Accounting”, which clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. The guidance is effective prospectively for interim and annual periods beginning after December 15, 2017 and early adoption is permitted. The Company will adopt this guidance upon its effective date. The Company does not expect the adoption of this guidance to have any material impact on the Company’s financial position, results of operations or cash flows.

 

In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment”, which removes the second step of the goodwill impairment test that requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. This guidance is effective prospectively for interim and annual reporting periods beginning after December 15, 2019. The Company will adopt this guidance upon its effective date. The Company does not expect the adoption of this guidance to have any material impact on the Company’s financial position, results of operations or cash flows.

 

In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805) Clarifying the Definition of a Business”, which amends the guidance of FASB Accounting Standards Codification Topic 805, “Business Combinations”, adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. This guidance is effective for annual and interim periods beginning after December 15, 2017, and early adoption is permitted under certain circumstances. The Company will evaluate the impact of this guidance on its financial statements and related disclosures next time there is a potential business combination.

 

In November 2016, the FASB issued ASU 2016-18, “Restricted Cash”, which requires a statement of cash flows to explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash and restricted cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This guidance is effective for annual and interim periods beginning after December 15, 2017, and early adoption is permitted. The Company will adopt this guidance upon its effective date.  The restricted cash balances as of September 30, 2017 and December 31, 2016 were $7.4 million and $8.6 million, respectively.

 

In October 2016, the FASB issued ASU 2016-16, “Intra-Entity Transfers Other Than Inventory”, which requires entities to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This guidance is effective for annual and interim periods beginning after December 15, 2017, and early adoption is permitted. The Company will adopt this guidance upon its effective date. The Company does not expect the adoption of this guidance to have any material impact on the Company’s financial position, results of operations or cash flows.

 

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments”, which changes the impairment model for most financial assets. The new model uses a forward-looking expected loss method, which will generally result in earlier recognition of allowances for losses. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019 and early adoption is permitted for annual and interim periods beginning after December 15, 2018. The Company is evaluating the impact of this guidance on its condensed consolidated financial statements and related disclosures.

 

In February 2016, the FASB issued ASU No. 2016-02, “Leases”. The standard will affect all entities that lease assets and will require lessees to recognize a lease liability and a right-of-use asset for all leases (except for short-term leases that have a duration of less than one year) as of the date on which the lessor makes the underlying asset available to the lessee. For lessors, accounting for leases is substantially the same as in prior periods. For public companies, the new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. For leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, lessees and lessors must apply a modified retrospective transition approach. While the Company expects the adoption of this standard to result in an increase to the reported assets and liabilities, the Company has not yet determined the full impact that the adoption of this standard will have on its condensed consolidated financial statements and related disclosures.

 

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers”. This new guidance will replace most existing U.S. GAAP guidance on this topic. The new revenue recognition standard provides a unified model to determine when and how revenue is recognized. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued ASU 2015-14 which deferred, by one year, the effective date for the new revenue reporting standard for entities reporting under U.S. GAAP. In accordance with the deferral, this guidance will be effective for the Company beginning January 1, 2018 and can be applied either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. Early adoption is permitted beginning January 1, 2017. In March 2016, the FASB issued ASU 2016-08, “Revenue from Contracts with Customers, Principal versus Agent Considerations (Reporting Revenue Gross versus Net)” clarifying the implementation guidance on principal versus agent considerations. Specifically, an entity is required to determine whether the nature of a promise is to provide the specified good or service itself (that is, the entity is a principal) or to arrange for the good or service to be provided to the customer by the other party (that is, the entity is an agent). The determination influences the timing and amount of revenue recognition. In April 2016, the FASB issued ASU 2016-10, “Revenue from Contracts with Customers, Identifying Performance Obligations and Licensing,” clarifying the implementation guidance on identifying performance obligations and licensing. Specifically, the amendments reduce the cost and complexity of identifying promised goods or services and improve the guidance for determining whether promises are separately identifiable. The amendments also provide implementation guidance on determining whether an entity’s promise to grant a license provides a customer with either a right to use the entity’s intellectual property (which is satisfied at a point in time) or a right to access the entity’s intellectual property (which is satisfied over time). In May 2016, the FASB issued ASU 2016-12 “Revenue from Contracts with Customers (Topic 606), Narrow-Scope Improvements and Practical Expedients,” which amends the guidance on transition, collectability, noncash consideration and the presentation of sales and other similar taxes. ASU 2016-12 clarifies that, for a contract to be considered completed at transition, all (or substantially all) of the revenue must have been recognized under legacy GAAP. In addition, ASU 2016-12 clarifies how an entity should evaluate the collectability threshold and when an entity can recognize nonrefundable consideration received as revenue if an arrangement does not meet the standard’s contract criteria.  In September 2017, the FASB issued ASU 2017-13, “Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842)”. These amendments provide additional clarification and implementation guidance on the previously issued ASUs. These amendments do not change the core principles of the guidance stated in ASU 2014-09, instead they are intended to clarify and improve operability of certain topics included within the revenue standard. The effective date and transition requirements for ASU 2016-08, ASU 2016-10 and ASU 2016-12 are the same as the effective date and transition requirements for ASU 2014-09. The Company performed its preliminary evaluation and selected a modified retrospective transition method with cumulative effect adjustment as of the standard’s effective date. While the Company has not yet completed the full analysis, based on the evaluation to date, the Company does not expect the adoption of this guidance to have a material impact on its financial position, results of operations or cash flows.

 

Fair Value Measurements (Tables)

 

The following tables summarize the Company’s financial assets as of September 30, 2017 and December 31, 2016 by type (in thousands):

 

 

 

Amortized Cost
or Carrying

 

Net
Unrealized

 

Fair Value Hierarchy as of September 30, 2017

 

Aggregate Fair

 

 

 

Value

 

Losses

 

Level 1

 

Level 2

 

Level 3

 

Value

 

Financial Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash and cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

 

$

90,144

 

$

 

$

90,144

 

$

 

$

 

$

90,144

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total included in cash and cash equivalents

 

90,144

 

 

90,144

 

 

 

90,144

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury securities

 

59,951

 

(125

)

59,826

 

 

 

59,826

 

Corporate debt securities

 

132,318

 

(113

)

 

132,205

 

 

132,205

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total marketable securities

 

192,269

 

(238

)

59,826

 

132,205

 

 

192,031

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total financial assets

 

$

282,413

 

$

(238

)

$

149,970

 

$

132,205

 

$

 

$

282,175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Carrying

 

Fair Value Hierarchy as of December 31, 2016

 

Aggregate Fair

 

 

 

Value

 

Level 1

 

Level 2

 

Level 3

 

Value Total

 

Financial Assets:

 

 

 

 

 

 

 

 

 

 

 

Money market funds (included in cash and cash equivalents)

 

$

274,135

 

$

274,135

 

$

 

$

 

$

274,135

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total financial assets

 

$

274,135

 

$

274,135

 

$

 

$

 

$

274,135

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The following table summarizes the contractual maturities of marketable securities as of September 30, 2017 (in thousands):

 

 

 

Amortized

 

Aggregate Fair

 

 

 

Cost

 

Value

 

Financial Assets:

 

 

 

 

 

Less than one year

 

$

121,215

 

$

121,130

 

One to two years

 

71,054

 

70,901

 

 

 

 

 

 

 

Total

 

$

192,269

 

$

192,031

 

 

 

 

 

 

 

 

 

 

Property and Equipment (Tables)
Schedule of property and equipment

 

Property and equipment consisted of the following (in thousands):

 

 

As of
September 30,
2017

 

As of
December 31,
2016

 

 

 

 

 

 

 

Capitalized software development costs

 

$

43,571

 

$

28,661

 

Leasehold improvements

 

14,208

 

14,063

 

Office equipment

 

9,263

 

5,729

 

Furniture and fixtures

 

1,902

 

1,576

 

Software

 

1,500

 

968

 

 

 

 

 

 

 

Total property and equipment

 

70,444

 

50,997

 

Less: accumulated depreciation and amortization

 

(22,726

)

(13,445

)

 

 

 

 

 

 

Total property and equipment, net

 

$

47,718

 

$

37,552

 

 

 

 

 

 

 

 

 

 

Recent Acquisition (Tables) (Messaging provider based in Sweden)

 

The following table presents the preliminary purchase price allocation recorded in the Company’s condensed consolidated balance sheet on the acquisition date, and as subsequently adjusted during the three months ended June 30, 2017 (in thousands):

 

 

 

Total

 

Net tangible liabilities

 

$

(3,326

)

Goodwill(1)

 

12,588

 

Intangible assets(2)

 

13,700

 

 

 

 

 

Total purchase price

 

$

22,962

 

 

 

 

 

 

 

The Company acquired a net deferred tax liability of $2.6 million in this business combination.

 

 

(1)

Goodwill represents the excess of purchase price over the fair value of identifiable tangible and intangible assets acquired and liabilities assumed. The goodwill in this transaction is primarily attributable to the future cash flows to be realized from the acquired technology platform, existing customer and supplier relationships as well as operational synergies.

 

(2)

Identifiable finite-lived intangible assets were comprised of the following:

 

 

 

Total

 

Estimated
life
(in years)

 

Developed technology

 

$

5,000

 

4

 

Customer relationships

 

6,100

 

7-8

 

Supplier relationships

 

2,600

 

5

 

 

 

 

 

 

 

Total intangible assets acquired

 

$

13,700

 

 

 

 

 

 

 

 

 

 

 

 

 

Total

 

Estimated
life
(in years)

 

Developed technology

 

$

5,000

 

4

 

Customer relationships

 

6,100

 

7-8

 

Supplier relationships

 

2,600

 

5

 

 

 

 

 

 

 

Total intangible assets acquired

 

$

13,700

 

 

 

 

 

 

 

 

 

 

 

Intangible Assets (Tables)

 

 

Total

 

Balance as of December 31, 2016

 

$

3,565

 

Goodwill recorded in connection with the recent acquisition

 

12,688

 

Measurement period adjustment

 

(100

)

Effect of exchange rate

 

1,254

 

 

 

 

 

Balance as of September 30, 2017

 

$

17,407

 

 

 

 

 

 

 

 

Intangible assets consisted of the following (in thousands):

 

 

As of September 30, 2017

 

 

 

Gross

 

Accumulated
Amortization

 

Net

 

Amortizable intangible assets:

 

 

 

 

 

 

 

Developed technology

 

$

14,888

 

$

(4,365

)

$

10,523

 

Customer relationships

 

7,096

 

(774

)

6,322

 

Supplier relationships

 

2,854

 

(364

)

2,490

 

Trade name

 

60

 

(60

)

 

Patent

 

1,737

 

(93

)

1,644

 

 

 

 

 

 

 

 

 

Total amortizable intangible assets

 

26,635

 

(5,656

)

20,979

 

 

 

 

 

 

 

 

 

Non-amortizable intangible assets:

 

 

 

 

 

 

 

Domain names

 

32

 

 

32

 

Trademarks

 

263

 

 

263

 

 

 

 

 

 

 

 

 

Total

 

$

26,930

 

$

(5,656

)

$

21,274

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

As of December 31, 2016

 

 

 

Gross

 

Accumulated
Amortization

 

Net

 

Amortizable intangible assets:

 

 

 

 

 

 

 

Developed technology

 

$

9,400

 

$

(1,140

)

$

8,260

 

Customer relationships

 

400

 

(148

)

252

 

Trade name

 

60

 

(56

)

4

 

Patent

 

1,512

 

(55

)

1,457

 

 

 

 

 

 

 

 

 

Total amortizable intangible assets

 

11,372

 

(1,399

)

9,973

 

 

 

 

 

 

 

 

 

Non-amortizable intangible assets:

 

 

 

 

 

 

 

Domain names

 

32

 

 

32

 

Trademarks

 

263

 

 

263

 

 

 

 

 

 

 

 

 

Total

 

$

11,667

 

$

(1,399

)

$

10,268

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total estimated future amortization expense was as follows (in thousands):

 

 

As of
September 30,
2017

 

2017 (remaining 3 months)

 

$

2,659

 

2018

 

5,483

 

2019

 

5,081

 

2020

 

2,651

 

2021

 

1,518

 

Thereafter

 

3,587

 

 

 

 

 

Total

 

$

20,979

 

 

 

 

 

 

 

Accrued Expenses and Other Liabilities (Tables)

 

Accrued expenses and other current liabilities consisted of the following (in thousands):

 

 

As of
September 30,

 

As of
December 31,

 

 

 

2017

 

2016

 

Accrued payroll and related

 

$

5,408

 

$

3,133

 

Accrued bonus and commission

 

3,204

 

2,251

 

Accrued cost of revenue

 

11,553

 

8,741

 

Sales and other taxes payable

 

19,394

 

28,795

 

ESPP contributions

 

3,574

 

4,364

 

Deferred rent

 

668

 

1,250

 

Accrued other expense

 

11,482

 

10,774

 

 

 

 

 

 

 

Total accrued expenses and other current liabilities

 

$

55,283

 

$

59,308

 

 

 

 

 

 

 

 

 

 

 

Long-term liabilities consisted of the following (in thousands):

 

 

As of
September 30,

 

As of
December 31,

 

 

 

2017

 

2016

 

Deferred rent

 

$

9,335

 

$

9,387

 

Deferred tax liability

 

2,780

 

 

Accrued other expense

 

434

 

156

 

 

 

 

 

 

 

Total other long-term liabilities

 

$

12,549

 

$

9,543

 

 

 

 

 

 

 

 

 

 

Supplemental Balance Sheet Information (Tables)

 

(a)   Allowance for doubtful accounts (in thousands):

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Balance, beginning of period

 

$

923

 

$

795

 

$

1,076

 

$

486

 

Additions

 

125

 

170

 

407

 

1,017

 

Write-offs

 

 

(16

)

(435

)

(554

)

 

 

 

 

 

 

 

 

 

 

Balance, end of period

 

$

1,048

 

$

949

 

$

1,048

 

$

949

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(b)   Sales credit reserve (in thousands):

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Balance, beginning of period

 

$

734

 

$

652

 

$

544

 

$

714

 

Additions

 

104

 

169

 

1,076

 

1,012

 

Deductions against reserve

 

(238

)

(337

)

(1,020

)

(1,242

)

 

 

 

 

 

 

 

 

 

 

Balance, end of period

 

$

600

 

$

484

 

$

600

 

$

484

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Revenue by Geographic Area (Tables)
Schedule of revenue by geographic area

 

The following table sets forth revenue by geographic area (dollars in thousands):

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Revenue by geographic area:

 

 

 

 

 

 

 

 

 

United States

 

$

76,713

 

$

60,535

 

$

221,914

 

$

165,528

 

International

 

23,829

 

10,998

 

61,870

 

29,855

 

 

 

 

 

 

 

 

 

 

 

Total

 

$

100,542

 

$

71,533

 

$

283,784

 

$

195,383

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Percentage of revenue by geographic  area:

 

 

 

 

 

 

 

 

 

United States

 

76

%

85

%

78

%

85

%

International

 

24

%

15

%

22

%

15

%

 

Commitments and Contingencies (Tables)
Schedule of future minimum lease payments under non-cancelable operating leases

 

Future minimum lease payments under non-cancelable operating leases were as follows (in thousands):

 

Year Ending December 31:

 

As of September 30,
2017

 

2017 (remaining three months)

 

$

1,958

 

2018

 

7,326

 

2019

 

7,375

 

2020

 

7,068

 

2021

 

7,033

 

Thereafter

 

16,052

 

 

 

 

 

Total minimum lease payments

 

$

46,812

 

 

 

 

 

 

 

Stockholders' Equity (Tables)
Schedule of reserved shares of common stock for issuance

 

 

As of
September 30,

 

As of
December 31,

 

 

 

2017

 

2016

 

Stock options issued and outstanding

 

11,380,189

 

14,649,276

 

Nonvested restricted stock units issued and outstanding

 

4,384,898

 

2,034,217

 

Class A common stock reserved for Twilio.org

 

680,397

 

680,397

 

Stock-based awards available for grant under 2016 Plan

 

11,601,980

 

10,143,743

 

Class A common stock reserved for issuance under 2016 ESPP

 

224,126

 

597,038

 

 

 

 

 

 

 

Total

 

28,271,590

 

28,104,671

 

 

 

 

 

 

 

 

Stock-Based Compensation (Tables)

 

 

Number of
options
outstanding

 

Weighted-
average
exercise
price
(per
share)

 

Weighted-
average
remaining
contractual
term
(in years)

 

Aggregate
intrinsic
value
(in
thousands)

 

Outstanding options as of December 31, 2016

 

14,649,276

 

$

6.14

 

7.52

 

$

332,716

 

Granted

 

1,443,335

 

31.06

 

 

 

 

 

Exercised

 

(4,615,225

)

4.88

 

 

 

 

 

Forfeited and cancelled

 

(652,197

)

7.93

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outstanding options as of September 30, 2017

 

10,825,189

 

$

9.89

 

7.37

 

$

218,574

 

 

 

 

 

 

 

 

 

 

 

 

 

Options vested and exercisable as of September 30, 2017

 

5,166,349

 

$

5.30

 

6.54

 

$

126,828

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Number of
awards
outstanding

 

Weighted-
average
grant date
fair value
(per
share)

 

Aggregate
intrinsic
value
(in
thousands)

 

Nonvested RSUs as of December 31, 2016

 

2,034,217

 

$

32.66

 

$

58,687

 

Granted

 

3,093,326

 

 

 

 

 

Vested

 

(492,757

)

 

 

 

 

Forfeited and cancelled

 

(249,888

)

 

 

 

 

 

 

 

 

 

 

 

 

Nonvested RSUs as of September 30, 2017

 

4,384,898

 

$

30.86

 

$

130,818

 

 

 

 

 

 

 

 

 

 

 

 

Employee Stock Purchase Plan:

 

 

 

 

 

 

 

 

 

Expected term (in years)

 

0.5

 

0.9

 

0.5

 

0.9

 

Expected volatility

 

33.2

%

52

%

33.2

%

52

%

Risk-free interest rate

 

1.1

%

0.6

%

1.1

%

0.6

%

Dividend rate

 

0

%

0

%

0

%

0

%

 

 

The Company recorded total stock-based compensation expense as follows (in thousands):

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Cost of revenue

 

$

180

 

$

84

 

$

460

 

$

135

 

Research and development

 

6,493

 

3,741

 

16,687

 

7,636

 

Sales and marketing

 

2,603

 

1,432

 

6,961

 

3,282

 

General and administrative

 

4,912

 

2,391

 

11,865

 

4,596

 

 

 

 

 

 

 

 

 

 

 

Total

 

$

14,188

 

$

7,648

 

$

35,973

 

$

15,649

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Employee Stock Options:

 

 

 

 

 

 

 

 

 

Fair value of common stock

 

*

 

*

 

$24.77 -$31.96

 

$10.09-$15.00

 

Expected term (in years)

 

*

 

*

 

6.08

 

6.08

 

Expected volatility

 

*

 

*

 

46.1%-47.6%

 

51.4%-53.0%

 

Risk-free interest rate

 

*

 

*

 

1.9%-2.1%

 

1.3%-1.5%

 

Dividend rate

 

*

 

*

 

0%

 

0%

 

 

*No stock options were granted in the period.

 

 

 

Number of
options
outstanding

 

Weighted-
average
exercise
price
(per
share)

 

Weighted-
average
remaining
contractual
term
(in years)

 

Aggregate
intrinsic
value
(in
thousands)

 

Outstanding options as of December 31, 2016

 

 

$

 

 

$

 

Granted

 

555,000

 

31.72

 

 

 

 

 

Exercised

 

 

 

 

 

 

 

Forfeited and cancelled

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outstanding options as of September 30, 2017

 

555,000

 

$

31.72

 

6.41

 

$

 

 

 

 

 

 

 

 

 

 

 

 

 

Options vested and exercisable as of September 30, 2017

 

 

$

 

 

$

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Asset volatility

 

40

%

Equity volatility

 

45

%

Discount rate

 

14

%

Stock price at grant date

 

$

31.72

 

 

Net Loss per Share Attributable to Common Stockholders (Tables)

 

The following table sets forth the calculation of basic and diluted net loss per share attributable to common stockholders during the periods presented (in thousands, except share and per share data):

 

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2017

 

2016

 

2017

 

2016

 

Net loss attributable to common stockholders

 

$

(23,453

)

$

(11,254

)

$

(44,789

)

$

(28,716

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted-average shares used to compute basic and diluted net loss per share attributable to common stockholders

 

92,156,768

 

83,887,901

 

90,543,087

 

42,030,989

 

 

 

 

 

 

 

 

 

 

 

Net loss per share attributable to common stockholders, basic and diluted

 

$

(0.25

)

$

(0.13

)

$

(0.49

)

$

(0.68

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

As of September 30,

 

 

 

2017

 

2016

 

 

 

 

 

 

 

Issued and outstanding options

 

11,380,189

 

16,476,973

 

Nonvested RSUs issued and outstanding

 

4,384,898

 

1,639,378

 

Common stock reserved for Twilio.org

 

680,397

 

780,397

 

Shares committed under 2016 ESPP

 

224,126

 

604,865

 

Unvested shares subject to repurchase

 

16,033

 

74,451

 

 

 

 

 

 

 

Total

 

16,685,643

 

19,576,064

 

 

 

 

 

 

 

 

Summary of Significant Accounting Policies - Concentration of Credit Risk (Details)
9 Months Ended 12 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2017
Accounts Receivable
Credit Concentration Risk
customer
Dec. 31, 2016
Accounts Receivable
Credit Concentration Risk
customer
Sep. 30, 2017
Revenue
Customer Concentration Risk
customer
Sep. 30, 2016
Revenue
Customer Concentration Risk
customer
Sep. 30, 2017
Revenue
Customer Concentration Risk
customer
Sep. 30, 2016
Revenue
Customer Concentration Risk
customer
Sep. 30, 2016
Revenue
Customer Concentration Risk
Customer One
Sep. 30, 2016
Revenue
Customer Concentration Risk
Customer Two
Concentration of Credit Risk
 
 
 
 
 
 
 
 
Concentration risk (as a percent)
11.00% 
16.00% 
 
15.00% 
 
 
10.00% 
13.00% 
Number of customers
 
 
Summary of Significant Accounting Policies - Restricted Cash (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Restricted Cash
 
 
Restricted cash balances
$ 7.4 
$ 8.6 
Fair Value Measurements - Assets Measured at Fair Value on a Recurring Basis (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Sep. 30, 2017
Recurring
Sep. 30, 2017
Recurring
U.S. Treasury securities
Sep. 30, 2017
Recurring
Corporate debt securities
Sep. 30, 2017
Recurring
Carrying Value
Dec. 31, 2016
Recurring
Carrying Value
Sep. 30, 2017
Recurring
Carrying Value
Money market funds
Dec. 31, 2016
Recurring
Carrying Value
Money market funds
Sep. 30, 2017
Recurring
Aggregate Fair Value
Dec. 31, 2016
Recurring
Aggregate Fair Value
Sep. 30, 2017
Recurring
Aggregate Fair Value
U.S. Treasury securities
Sep. 30, 2017
Recurring
Aggregate Fair Value
Corporate debt securities
Sep. 30, 2017
Recurring
Aggregate Fair Value
Money market funds
Dec. 31, 2016
Recurring
Aggregate Fair Value
Money market funds
Sep. 30, 2017
Recurring
Aggregate Fair Value
Level 1
Dec. 31, 2016
Recurring
Aggregate Fair Value
Level 1
Sep. 30, 2017
Recurring
Aggregate Fair Value
Level 1
U.S. Treasury securities
Sep. 30, 2017
Recurring
Aggregate Fair Value
Level 1
Money market funds
Dec. 31, 2016
Recurring
Aggregate Fair Value
Level 1
Money market funds
Sep. 30, 2017
Recurring
Aggregate Fair Value
Level 2
Sep. 30, 2017
Recurring
Aggregate Fair Value
Level 2
Corporate debt securities
Fair Value Measurements
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
 
 
 
 
 
$ 90,144 
 
$ 90,144 
$ 274,135 
$ 90,144 
 
 
 
$ 90,144 
$ 274,135 
$ 90,144 
 
 
$ 90,144 
$ 274,135 
 
 
Marketable securities, Amortized Cost
192,269 
 
192,269 
59,951 
132,318 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Marketable securities, Net Unrealized Losses
 
 
(238)
(125)
(113)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total marketable securities, Aggregate Fair Value
192,031 
 
 
 
 
 
 
 
192,031 
 
59,826 
132,205 
 
 
59,826 
 
59,826 
 
 
132,205 
132,205 
Total financial assets, Amortized Cost or Carrying Value
 
 
282,413 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total financial assets
 
 
 
 
 
 
$ 274,135 
 
 
$ 282,175 
$ 274,135 
 
 
 
 
$ 149,970 
$ 274,135 
 
 
 
$ 132,205 
 
Fair Value Measurements - Contractual Maturities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Fair Value Measurements
 
 
Less than one year, Amortized Cost
$ 121,215 
 
One to two years, Amortized Cost
71,054 
 
Total amortized cost
192,269 
 
Less than one year, Aggregate Fair Value
121,130 
 
One to two years, Aggregate Fair Value
70,901 
 
Total marketable securities, Aggregate Fair Value
$ 192,031 
$ 0 
Fair Value Measurements - Additional Disclosures (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2017
Fair Value Measurements
 
 
Other-than-temporary impairments
$ 0 
$ 0 
Interest earned on marketable securities
$ 700,000 
$ 1,800,000 
Property and Equipment - Property and Equipment, Net (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Property and Equipment
 
 
Total property and equipment
$ 70,444 
$ 50,997 
Less: accumulated depreciation and amortization
(22,726)
(13,445)
Total property and equipment, net
47,718 
37,552 
Capitalized software development costs
 
 
Property and Equipment
 
 
Total property and equipment
43,571 
28,661 
Leasehold improvements
 
 
Property and Equipment
 
 
Total property and equipment
14,208 
14,063 
Office equipment
 
 
Property and Equipment
 
 
Total property and equipment
9,263 
5,729 
Furniture and fixtures
 
 
Property and Equipment
 
 
Total property and equipment
1,902 
1,576 
Software
 
 
Property and Equipment
 
 
Total property and equipment
$ 1,500 
$ 968 
Property and Equipment - Depreciation and Amortization Expense (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Property and Equipment
 
 
 
 
Depreciation and amortization
$ 3.4 
$ 1.9 
$ 9.3 
$ 4.9 
Property and Equipment - Capitalized Stock-Based Compensation Expense (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Property and Equipment
 
 
 
 
Capitalized software development costs
$ 5,500,000 
$ 3,400,000 
$ 15,000,000 
$ 9,500,000 
Stock-based compensation capitalized in software development costs
1,200,000 
400,000 
2,712,000 
1,068,000 
Amortization of capitalized software development costs
$ 2,200,000 
$ 1,400,000 
$ 5,900,000 
$ 3,700,000 
Recent Acquisition - Consideration (Details) (Messaging provider based in Sweden, USD $)
In Millions, unless otherwise specified
0 Months Ended
Feb. 6, 2017
Messaging provider based in Sweden
 
Acquisition
 
Total purchase price
$ 23.0 
Purchase price paid in cash
23.0 
Amount of purchase price placed into an escrow account
5.0 
Escrow effective period
18 months 
Amount deposited into an employee escrow account
$ 2.0 
Recent Acquisition - Purchase Price Allocation (Details) (USD $)
Sep. 30, 2017
Dec. 31, 2016
Feb. 6, 2017
Messaging provider based in Sweden
Acquisition
 
 
 
Net tangible liabilities
 
 
$ (3,326,000)
Goodwill
17,407,000 
3,565,000 
12,588,000 
Intangible assets
 
 
13,700,000 
Total purchase price
 
 
22,962,000 
Net deferred tax liability
 
 
$ 2,600,000 
Recent Acquisition - Identifiable Finite-lived Intangible Assets (Details) (Messaging provider based in Sweden, USD $)
In Thousands, unless otherwise specified
0 Months Ended
Feb. 6, 2017
Feb. 6, 2017
Acquisition
 
 
Total intangible assets acquired
$ 13,700 
$ 13,700 
Developed technology
 
 
Acquisition
 
 
Total intangible assets acquired
 
5,000 
Estimated life (in years)
4 years 
 
Customer relationships
 
 
Acquisition
 
 
Total intangible assets acquired
6,100 
6,100 
Customer relationships |
Minimum
 
 
Acquisition
 
 
Estimated life (in years)
7 years 
 
Customer relationships |
Maximum
 
 
Acquisition
 
 
Estimated life (in years)
8 years 
 
Supplier relationships
 
 
Acquisition
 
 
Total intangible assets acquired
 
$ 2,600 
Estimated life (in years)
5 years 
 
Recent Acquisition - Acquisition Costs (Details) (Messaging provider based in Sweden, General and administrative, USD $)
In Millions, unless otherwise specified
9 Months Ended 12 Months Ended 21 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Sep. 30, 2017
Messaging provider based in Sweden |
General and administrative
 
 
 
Business Combinations
 
 
 
Acquisition related costs
$ 0.3 
$ 0.4 
$ 0.7 
Intangible Assets - Goodwill (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2017
Goodwill
 
Balance at the beginning of the period
$ 3,565 
Goodwill recorded in connection with the recent acquisition
12,688 
Measurement period adjustment
(100)
Effect of exchange rate
1,254 
Balance at the end of the period
$ 17,407 
Intangible Assets - Amortizable Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Intangible Assets
 
 
Gross
$ 26,635 
$ 11,372 
Accumulated Amortization
(5,656)
(1,399)
Net
20,979 
9,973 
Developed technology
 
 
Intangible Assets
 
 
Gross
14,888 
9,400 
Accumulated Amortization
(4,365)
(1,140)
Net
10,523 
8,260 
Customer relationships
 
 
Intangible Assets
 
 
Gross
7,096 
400 
Accumulated Amortization
(774)
(148)
Net
6,322 
252 
Supplier relationships
 
 
Intangible Assets
 
 
Gross
2,854 
 
Accumulated Amortization
(364)
 
Net
2,490 
 
Trade name
 
 
Intangible Assets
 
 
Gross
60 
60 
Accumulated Amortization
(60)
(56)
Net
 
Patent
 
 
Intangible Assets
 
 
Gross
1,737 
1,512 
Accumulated Amortization
(93)
(55)
Net
$ 1,644 
$ 1,457 
Intangible Assets - Non-amortizable Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Domain names
 
 
Intangible Assets
 
 
Non-amortizable intangible assets
$ 32 
$ 32 
Trademarks
 
 
Intangible Assets
 
 
Non-amortizable intangible assets
$ 263 
$ 263 
Intangible Assets - Total Intangible Assets, Gross (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Intangible Assets
 
 
 
Amortizable intangible assets, gross
$ 26,635 
$ 11,372 
 
Total
26,930 
11,667 
11,372 
Domain names
 
 
 
Intangible Assets
 
 
 
Non-amortizable intangible assets
32 
32 
 
Trademarks
 
 
 
Intangible Assets
 
 
 
Non-amortizable intangible assets
$ 263 
$ 263 
 
Intangible Assets - Total Intangible Assets, Net (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Intangible Assets
 
 
Amortizable intangible assets, net
$ 20,979 
$ 9,973 
Total
21,274 
10,268 
Domain names
 
 
Intangible Assets
 
 
Non-amortizable intangible assets
32 
32 
Trademarks
 
 
Intangible Assets
 
 
Non-amortizable intangible assets
$ 263 
$ 263 
Intangible Assets - Total Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Intangible Assets
 
 
 
Gross
$ 26,930 
$ 11,667 
$ 11,372 
Accumulated Amortization
(5,656)
(1,399)
 
Net
$ 21,274 
$ 10,268 
 
Intangible Assets - Amortization Expense (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Intangible Assets
 
 
 
 
Amortization expense
$ 1.5 
$ 0.1 
$ 4.2 
$ 0.4 
Intangible Assets - Total Estimated Future Amortization Expense (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Intangible Assets
 
 
2017 (remaining 3 months)
$ 2,659 
 
2018
5,483 
 
2019
5,081 
 
2020
2,651 
 
2021
1,518 
 
Thereafter
3,587 
 
Net
$ 20,979 
$ 9,973 
Accrued Expenses and Other Liabilities - Accrued Expenses and Other Current Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Accrued Expenses and Other Liabilities
 
 
Accrued payroll and related
$ 5,408 
$ 3,133 
Accrued bonus and commission
3,204 
2,251 
Accrued cost of revenue
11,553 
8,741 
Sales and other taxes payable
19,394 
28,795 
ESPP contributions
3,574 
4,364 
Deferred rent
668 
1,250 
Accrued other expense
11,482 
10,774 
Total accrued expenses and other current liabilities
$ 55,283 
$ 59,308 
Accrued Expenses and Other Liabilities - Long-term Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Accrued Expenses and Other Liabilities
 
 
Deferred rent
$ 9,335 
$ 9,387 
Deferred tax liability
2,780 
 
Accrued other expense
434 
156 
Total long-term liabilities
$ 12,549 
$ 9,543 
Supplemental Balance Sheet Information - Allowance for Doubtful Accounts (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Allowance for doubtful accounts
 
 
 
 
Balance, beginning of period
$ 923 
$ 795 
$ 1,076 
$ 486 
Additions
125 
170 
407 
1,017 
Write-offs
 
(16)
(435)
(554)
Balance, end of period
$ 1,048 
$ 949 
$ 1,048 
$ 949 
Supplemental Balance Sheet Information - Sales Credit Reserve (Details) (Sales credit reserve, USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Sales credit reserve
 
 
 
 
Sales credit reserve
 
 
 
 
Balance, beginning of period
$ 734 
$ 652 
$ 544 
$ 714 
Additions
104 
169 
1,076 
1,012 
Deductions against reserve
(238)
(337)
(1,020)
(1,242)
Balance, end of period
$ 600 
$ 484 
$ 600 
$ 484 
Revenue by Geographic Area - Revenue by Geographic Area (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Revenue by geographic area
 
 
 
 
Revenue
$ 100,542 
$ 71,533 
$ 283,784 
$ 195,383 
United States
 
 
 
 
Revenue by geographic area
 
 
 
 
Revenue
76,713 
60,535 
221,914 
165,528 
International
 
 
 
 
Revenue by geographic area
 
 
 
 
Revenue
$ 23,829 
$ 10,998 
$ 61,870 
$ 29,855 
Revenue by Geographic Area - Percentage of Revenue by Geographic Area (Details) (Revenue, Geographic Concentration Risk)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
United States
 
 
 
 
Percentage of revenue by geographic area
 
 
 
 
Percentage of revenue (as a percent)
76.00% 
85.00% 
78.00% 
85.00% 
International
 
 
 
 
Percentage of revenue by geographic area
 
 
 
 
Percentage of revenue (as a percent)
24.00% 
15.00% 
22.00% 
15.00% 
Commitments and Contingencies - Lease Commitments (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Lease Commitments
 
 
 
 
Lease agreements term
 
 
7 years 
 
Rent expense
$ 2.1 
$ 2.1 
$ 6.1 
$ 5.1 
Commitments and Contingencies - Future Minimum Lease Payments (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Future minimum lease payments
 
2017 (remaining three months)
$ 1,958 
2018
7,326 
2019
7,375 
2020
7,068 
2021
7,033 
Thereafter
16,052 
Total minimum lease payments
$ 46,812 
Commitments and Contingencies - Indemnification Agreements (Details) (Indemnification Agreement, USD $)
In Thousands, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Indemnification Agreement
 
 
Indemnification Agreements
 
 
Amount accrued
$ 0 
$ 0 
Commitments and Contingencies - Other taxes (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Mar. 31, 2017
Dec. 31, 2016
Other taxes
 
 
 
 
 
 
Liability for uncertain tax positions
$ 19,400,000 
 
$ 19,400,000 
 
$ 29,000,000 
$ 28,800,000 
Net loss attributable to common stockholders
(23,453,000)
(11,254,000)
(44,789,000)
(28,716,000)
 
 
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)
$ (0.25)
$ (0.13)
$ (0.49)
$ (0.68)
 
 
Change in estimate for non-income-based tax exposure - revisions in key assumptions
 
 
 
 
 
 
Other taxes
 
 
 
 
 
 
Net loss attributable to common stockholders
 
 
$ (13,100,000)
 
 
 
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)
 
 
$ (0.14)
 
 
 
Stockholders' Equity - Preferred Stock (Details) (USD $)
Sep. 30, 2017
Preferred Stock
 
Preferred stock, authorized (in shares)
100,000,000 
Preferred stock, par value (in dollars per share)
$ 0.001 
Preferred stock, issued (in shares)
Preferred stock, outstanding (in shares)
Stockholders' Equity - Common Stock (Details) (USD $)
Sep. 30, 2017
Dec. 31, 2016
Common Class A
 
 
Common Stock
 
 
Common stock, authorized (in shares)
1,000,000,000 
1,000,000,000 
Common stock, par value (in dollars per share)
$ 0.001 
$ 0.001 
Common stock, issued (in shares)
68,671,207 
49,996,410 
Common stock, outstanding (in shares)
68,671,207 
49,996,410 
Common Class B
 
 
Common Stock
 
 
Common stock, authorized (in shares)
100,000,000 
100,000,000 
Common stock, par value (in dollars per share)
$ 0.001 
$ 0.001 
Common stock, issued (in shares)
24,248,777 
37,252,138 
Common stock, outstanding (in shares)
24,248,777 
37,252,138 
Stockholders' Equity - Common Stock Shares Reserved (Details)
Sep. 30, 2017
Dec. 31, 2016
Stockholders' Equity
 
 
Reserved shares of common stock (in shares)
28,271,590 
28,104,671 
2016 Stock Option and Incentive Plan
 
 
Stockholders' Equity
 
 
Stock - based awards available for grant (in shares)
11,601,980 
10,143,743 
Common Class A
 
 
Stockholders' Equity
 
 
Common stock reserved for Twilio.org (in shares)
680,397 
680,397 
Stock Options
 
 
Stockholders' Equity
 
 
Stock options issued and outstanding (in shares)
11,380,189 
14,649,276 
Restricted Stock Units (RSUs)
 
 
Stockholders' Equity
 
 
Nonvested restricted stock units issued and outstanding (in shares)
4,384,898 
2,034,217 
Employee Stock |
Common Class A
 
 
Stockholders' Equity
 
 
Common stock reserved for issuance under an ESPP (in shares)
224,126 
597,038 
Stock-Based Compensation - 2008 Stock Option Plan (Details) (2008 Stock Option Plan)
Sep. 30, 2017
2008 Stock Option Plan
 
Stock Based Compensation
 
Shares available for future issuance (in shares)
Stock-Based Compensation - 2016 Stock Option Plan (Details)
9 Months Ended 1 Months Ended 9 Months Ended 0 Months Ended
Sep. 30, 2017
Employee and Nonemployee Stock Options
Sep. 30, 2017
Employee and Nonemployee Stock Options
First vesting
Sep. 30, 2017
Restricted Stock Units (RSUs)
Jul. 31, 2017
Restricted Stock Units (RSUs)
Granted in July 2017
Sep. 30, 2017
Restricted Stock Units (RSUs)
First vesting
Jan. 1, 2017
2016 Stock Option and Incentive Plan
Sep. 30, 2017
2016 Stock Option and Incentive Plan
Jun. 21, 2016
2016 Stock Option and Incentive Plan
Common Class A
Sep. 30, 2017
2016 Stock Option and Incentive Plan
Employee and Nonemployee Stock Options
Stock Based Compensation
 
 
 
 
 
 
 
 
 
Shares reserved for issuance (in shares)
 
 
 
 
 
 
 
11,500,000 
 
Maximum automatic annual increase as a percentage of outstanding common shares
 
 
 
 
 
 
5.00% 
 
 
Automatic increase in shares available for grant (in shares)
 
 
 
 
 
4,362,427 
 
 
 
Minimum grant price as a percentage of fair market value per share of the underlying common stock on the date of grant (as a percent)
 
 
 
 
 
 
 
 
100.00% 
Expiration term
10 years 
 
 
 
 
 
 
 
 
Vesting period
4 years 
1 year 
4 years 
4 years 
1 year 
 
 
 
 
Percentage of vesting rights
 
25.00% 
 
 
25.00% 
 
 
 
 
Stock-Based Compensation - 2016 Employee Stock Purchase Plan (Details) (Employee Stock, USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended
Jan. 1, 2017
Sep. 30, 2017
Jun. 30, 2017
Common Class A
Sep. 30, 2017
Common Class A
Jun. 21, 2016
Common Class A
Dec. 31, 2017
Common Class A
Forecast
Stock Based Compensation
 
 
 
 
 
 
Shares reserved for issuance (in shares)
 
 
 
 
2,400,000 
 
Maximum automatic annual increase (in shares)
 
1,800,000 
 
 
 
 
Maximum automatic annual increase as a percentage of outstanding common shares
 
1.00% 
 
 
 
 
Automatic increase in shares available for grant (in shares)
872,485 
 
 
 
 
 
Discount from market price, offering date (as a percent)
 
 
 
15.00% 
 
 
Discount from market price, purchase date (as a percent)
 
 
 
15.00% 
 
 
Purchase price, percentage of fair market value (as a percent)
 
 
 
85.00% 
 
 
Shares purchased (in shares)
 
 
580,705 
 
 
224,126 
Unrecognized compensation cost, other than options
 
$ 0.3 
 
 
 
 
Weighted-average period (in years)
 
1 month 17 days 
 
 
 
 
Stock-Based Compensation - Stock Option Activity (Details) (Employee and Nonemployee Stock Options, USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Dec. 31, 2016
Employee and Nonemployee Stock Options
 
 
 
 
Number of options outstanding
 
 
 
 
Outstanding options as of the beginning of the period (in shares)
 
 
14,649,276 
 
Granted (in shares)
1,443,335 
 
Exercised (in shares)
 
 
(4,615,225)
 
Forfeited and cancelled (in shares)
 
 
(652,197)
 
Outstanding options as of the end of the period (in shares)
10,825,189 
 
10,825,189 
14,649,276 
Weighted-average exercise price (per share)
 
 
 
 
Outstanding options as of the beginning of the period (in dollars per share)
 
 
$ 6.14 
 
Granted (in dollars per share)
 
 
$ 31.06 
 
Exercised (in dollars per share)
 
 
$ 4.88 
 
Forfeited and cancelled (in dollars per share)
 
 
$ 7.93 
 
Outstanding options as of the end of the period (in dollars per share)
$ 9.89 
 
$ 9.89 
$ 6.14 
Weighted-average remaining contractual term and aggregate intrinsic value
 
 
 
 
Weighted-average remaining contractual term (in years)
 
 
7 years 4 months 13 days 
7 years 6 months 7 days 
Aggregate intrinsic value
$ 218,574 
 
$ 218,574 
$ 332,716 
Options vested and exercisable and options vested and expected to vest
 
 
 
 
Options vested and exercisable - number of options outstanding (in shares)
5,166,349 
 
5,166,349 
 
Options vested and exercisable - weighted-average exercise price (in dollars per share)
$ 5.30 
 
$ 5.30 
 
Options vested and exercisable - weighted-average remaining contractual term (in years)
 
 
6 years 6 months 15 days 
 
Options vested and exercisable - aggregate intrinsic value
$ 126,828 
 
$ 126,828 
 
Stock-Based Compensation - Stock Options - Additional Information (Details) (Employee and Nonemployee Stock Options, USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Employee and Nonemployee Stock Options
 
 
 
 
Stock Based Compensation
 
 
 
 
Aggregate intrinsic value of stock options exercised
$ 18.6 
$ 4.4 
$ 119.3 
$ 15.7 
Grant date fair value of options vested
$ 3.0 
$ 4.9 
$ 12.2 
$ 11.4 
Weighted-average grant date fair value of options granted (in dollars per share)
 
 
$ 13.48 
$ 5.52 
Stock-Based Compensation - Performance-Based Stock Options (Details) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended 9 Months Ended
Feb. 28, 2017
item
Sep. 30, 2017
Performance-based stock options
 
 
Stock-Based Compensation
 
 
Number of distinct awards
 
Total grant value
$ 5.9 
 
Vesting period upon satisfaction of performance condition
24 months 
 
Performance condition achievement window
4 years 3 months 18 days 
 
Expiration term
7 years 
 
Number of options outstanding
 
 
Granted (in shares)
 
555,000 
Outstanding options as of the end of the period (in shares)
 
555,000 
Weighted-average exercise price (per share)
 
 
Granted (in dollars per share)
 
$ 31.72 
Outstanding options as of the end of the period (in dollars per share)
 
$ 31.72 
Weighted-average remaining contractual term and aggregate intrinsic value
 
 
Weighted-average remaining contractual term (in years)
 
6 years 4 months 28 days 
Performance-based stock options, $13.48 grant date fair value
 
 
Stock-Based Compensation
 
 
Grant date fair value (in dollars per share)
$ 13.48 
 
Derived service period
3 years 
 
Performance-based stock options, $10.26 grant date fair value
 
 
Stock-Based Compensation
 
 
Grant date fair value (in dollars per share)
$ 10.26 
 
Derived service period
4 years 3 months 
 
Performance-based stock options, $8.41 grant date fair value
 
 
Stock-Based Compensation
 
 
Grant date fair value (in dollars per share)
$ 8.41 
 
Derived service period
4 years 9 months 
 
Stock-Based Compensation - Stock Options - Unrecognized Compensation Cost (Details) (Employee and Nonemployee Stock Options, USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2017
Employee and Nonemployee Stock Options
 
Stock Based Compensation
 
Unrecognized compensation cost, options
$ 38.6 
Weighted-average period (in years)
2 years 2 months 12 days 
Stock-Based Compensation - Restricted Stock Units Activity (Details) (Restricted Stock Units (RSUs), USD $)
In Thousands, except Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Restricted Stock Units (RSUs)
 
 
Number of units outstanding
 
 
Nonvested RSUs at the beginning of the period (in shares)
2,034,217 
 
Granted (in shares)
3,093,326 
 
Vested (in shares)
(492,757)
 
Forfeited and cancelled (in shares)
(249,888)
 
Nonvested RSUs at the end of the period (in shares)
4,384,898 
 
Weighted-average grant date fair value (per share)
 
 
Nonvested RSUs (in dollars per share)
$ 30.86 
$ 32.66 
Aggregate intrinsic value
 
 
Aggregate intrinsic value
$ 130,818 
$ 58,687 
Stock-Based Compensation - Restricted Stock Units - Unrecognized Compensation Cost (Details) (Restricted Stock Units (RSUs), USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2017
Restricted Stock Units (RSUs)
 
Stock Based Compensation
 
Unrecognized compensation cost, other than options
$ 121.1 
Weighted-average period (in years)
3 years 3 months 4 days 
Stock-Based Compensation - Equity Awards Granted to Nonemployees (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2016
Nonemployee Restricted Stock Units
Sep. 30, 2017
Nonemployee Restricted Stock Units
Sep. 30, 2017
Nonemployee Restricted Stock Units
Sep. 30, 2017
Nonemployee Stock Option
Stock Based Compensation
 
 
 
 
 
 
 
 
Restricted stock units granted (in shares)
 
 
 
 
30,255 
 
 
 
Service condition period (in years)
 
 
 
 
2 years 
 
 
 
Stock-based compensation expense
$ 14,188 
$ 7,648 
$ 35,973 
$ 15,649 
 
$ 100 
$ 300 
 
Restricted stock unit awards outstanding (in shares)
 
 
 
 
 
 
Stock option awards outstanding (in shares)
 
 
 
 
 
 
 
Stock-Based Compensation - Early Exercises of Nonvested Options (Details) (Employee Stock Option, USD $)
In Millions, except Share data, unless otherwise specified
Sep. 30, 2017
Dec. 31, 2016
Employee Stock Option
 
 
Stock Based Compensation
 
 
Liability for unvested shares
$ 0.1 
$ 0.3 
Unvested shares that were early exercised (in shares)
16,033 
49,580 
Stock-Based Compensation - Valuation Assumptions (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Employee Stock Option
 
 
 
 
Valuation Assumptions
 
 
 
 
Expected term (in years)
 
 
6 years 29 days 
6 years 29 days 
Expected volatility, low end of range (as a percent)
 
 
46.10% 
51.40% 
Expected volatility, high end of range (as a percent)
 
 
47.60% 
53.00% 
Risk-free interest rate, low end of range (as a percent)
 
 
1.90% 
1.30% 
Risk-free interest rate, high end of range (as a percent)
 
 
2.10% 
1.50% 
Dividend rate (as a percent)
 
 
0.00% 
0.00% 
Stock options granted (in shares)
 
 
Employee Stock
 
 
 
 
Valuation Assumptions
 
 
 
 
Expected term (in years)
6 months 
10 months 24 days 
6 months 
10 months 24 days 
Expected volatility (as a percent)
33.20% 
52.00% 
33.20% 
52.00% 
Risk-free interest rate (as a percent)
1.10% 
0.60% 
1.10% 
0.60% 
Dividend rate (as a percent)
0.00% 
0.00% 
0.00% 
0.00% 
Performance-based stock options
 
 
 
 
Valuation Assumptions
 
 
 
 
Stock options granted (in shares)
 
 
555,000 
 
Asset volatility (as a percent)
 
 
40.00% 
 
Equity volatility (as a percent)
 
 
45.00% 
 
Discount rate (as a percent)
 
 
14.00% 
 
Stock price at grant date (in dollars per share)
$ 31.72 
 
$ 31.72 
 
Minimum |
Employee Stock Option
 
 
 
 
Valuation Assumptions
 
 
 
 
Fair value of common stock (in dollars per share)
 
 
$ 24.77 
$ 10.09 
Maximum |
Employee Stock Option
 
 
 
 
Valuation Assumptions
 
 
 
 
Fair value of common stock (in dollars per share)
 
 
$ 31.96 
$ 15.00 
Stock-Based Compensation - Stock-Based Compensation Expense (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Stock-Based Compensation Expense
 
 
 
 
Stock-based compensation expense
$ 14,188 
$ 7,648 
$ 35,973 
$ 15,649 
Cost of revenue
 
 
 
 
Stock-Based Compensation Expense
 
 
 
 
Stock-based compensation expense
180 
84 
460 
135 
Research and development
 
 
 
 
Stock-Based Compensation Expense
 
 
 
 
Stock-based compensation expense
6,493 
3,741 
16,687 
7,636 
Sales and marketing
 
 
 
 
Stock-Based Compensation Expense
 
 
 
 
Stock-based compensation expense
2,603 
1,432 
6,961 
3,282 
General and administrative
 
 
 
 
Stock-Based Compensation Expense
 
 
 
 
Stock-based compensation expense
$ 4,912 
$ 2,391 
$ 11,865 
$ 4,596 
Net Loss per Share Attributable to Common Stockholders - General Information (Details)
Sep. 30, 2017
Vote
Common Class A
 
Net Loss Per Share Attributable to Common Stockholders
 
Votes per share
Common Class B
 
Net Loss Per Share Attributable to Common Stockholders
 
Votes per share
10 
Net Loss per Share Attributable to Common Stockholders - Basic and Diluted Net Loss per Share Attributable to Common Stockholders (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Net Loss Per Share Attributable to Common Stockholders
 
 
 
 
Net loss attributable to common stockholders
$ (23,453)
$ (11,254)
$ (44,789)
$ (28,716)
Weighted-average shares used to compute basic and diluted net loss per share attributable to common stockholders (in shares)
92,156,768 
83,887,901 
90,543,087 
42,030,989 
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)
$ (0.25)
$ (0.13)
$ (0.49)
$ (0.68)
Net Loss per Share Attributable to Common Stockholders - Anti-Dilutive Securities (Details)
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Anti-dilutive securities
 
 
Total
16,685,643 
19,576,064 
Employee and Nonemployee Stock Options
 
 
Anti-dilutive securities
 
 
Total
11,380,189 
16,476,973 
Restricted Stock Units (RSUs)
 
 
Anti-dilutive securities
 
 
Total
4,384,898 
1,639,378 
Common stock reserved for Twilio.org
 
 
Anti-dilutive securities
 
 
Total
680,397 
780,397 
Employee Stock
 
 
Anti-dilutive securities
 
 
Total
224,126 
604,865 
Unvested shares subject to repurchase
 
 
Anti-dilutive securities
 
 
Total
16,033 
74,451 
Transactions with Investors (Details) (Investor, USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2017
Counterparty
Dec. 31, 2016
Counterparty
Dec. 31, 2015
Counterparty
Sep. 30, 2017
Vendor 1
Sep. 30, 2016
Vendor 1
Sep. 30, 2017
Vendor 1
Sep. 30, 2016
Vendor 1
Dec. 31, 2016
Vendor 1
Sep. 30, 2017
Vendor 2
Sep. 30, 2016
Vendor 2
Sep. 30, 2017
Vendor 2
Sep. 30, 2016
Vendor 2
Dec. 31, 2016
Vendor 2
Transactions With Investors
 
 
 
 
 
 
 
 
 
 
 
 
 
Vendors, number
 
 
 
 
 
 
 
 
 
 
Ownership percentage (as a percent)
 
 
 
1.90% 
 
1.90% 
 
2.00% 
1.00% 
 
1.00% 
 
1.00% 
Purchases from vendor
 
 
 
$ 5.3 
$ 3.7 
$ 14.7 
$ 10.3 
 
$ 0.2 
$ 0.1 
$ 0.6 
$ 0.3 
 
Amount due from vendor
 
 
 
$ 1.9 
 
$ 1.9 
 
 
 
 
 
 
 
Employee Benefit Plan (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Employee Benefit Plan
 
 
 
 
Employer contributions
$ 0.3 
$ 0.2 
$ 1.6 
$ 0.9