DocuSign (DOCU) 10-Q 7 Dec 18 2019 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Oct. 31, 2018	Nov. 30, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	DOCUSIGN INC
Entity Central Index Key	1,261,333
Current Fiscal Year End Date	--01-31
Document Type	10-Q
Amendment Flag	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Small Business	false
Document Period End Date	Oct. 31, 2018
Document Fiscal Year Focus	2,019
Document Fiscal Period Focus	Q3
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		165,250,665

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Current assets
Cash and cash equivalents	$ 1,094,133	$ 256,867
Restricted cash	367	569
Accounts receivable	130,611	123,750
Contract assets—current	12,056	14,260
Prepaid expense and other current assets	28,344	23,349
Total current assets	1,265,511	418,795
Property and equipment, net	73,965	63,019
Goodwill	194,533	37,306
Intangible assets, net	79,161	14,148
Deferred contract acquisition costs—noncurrent	97,091	75,535
Other assets—noncurrent	9,175	11,170
Total assets	1,719,436	619,973
Current liabilities
Accounts payable	22,059	23,713
Accrued expenses	22,669	15,734
Accrued compensation	53,686	50,852
Contract liabilities—current	316,619	270,188
Deferred rent—current	2,029	1,758
Other liabilities—current	17,574	11,574
Total current liabilities	434,636	373,819
Convertible senior notes, net	432,572	0
Contract liabilities—noncurrent	7,135	7,736
Deferred rent—noncurrent	23,050	23,044
Deferred tax liability—noncurrent	2,500	2,511
Other liabilities—noncurrent	9,374	4,010
Total liabilities	909,267	411,120
Commitments and contingencies (Note 10)
Redeemable convertible preferred stock, $0.0001 par value; 0 shares authorized, issued and outstanding as of October 31, 2018; 100,603 shares authorized, 100,226 shares issued and outstanding, $548,910 liquidation preference as of January 31, 2018	0	547,501
Stockholders’ equity (deficit)
Preferred stock, $0.0001 par value; 10,000 shares authorized, 0 shares issued and outstanding as of October 31, 2018; 0 shares authorized, issued and outstanding as of January 31, 2018	0	0
Common stock, $0.0001 par value; 500,000 shares authorized, 157,255 shares outstanding as of October 31, 2018; 185,000 shares authorized, 35,700 shares outstanding as of January 31, 2018	16	4
Additional paid-in capital	1,676,180	160,265
Accumulated other comprehensive (loss) income	(3,493)	3,403
Accumulated deficit	(862,534)	(502,320)
Total stockholders’ equity (deficit)	810,169	(338,648)
Total liabilities, redeemable convertible preferred stock, and stockholders’ equity (deficit)	$ 1,719,436	$ 619,973

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Statement of Financial Position [Abstract]
Redeemable convertible preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Redeemable convertible preferred stock, shares authorized (in shares)	0	100,603,000
Redeemable convertible preferred stock, shares issued (in shares)	0	100,226,000
Redeemable convertible preferred stock, shares outstanding (in shares)	0	100,226,000
Redeemable convertible preferred stock, liquidation preference		$ 548,910
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000	0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	500,000,000	185,000,000
Common stock, shares outstanding (in shares)	157,255,000	35,700,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Revenue:
Total revenue	$ 178,385	$ 130,589	$ 501,237	$ 369,630
Cost of revenue:
Total cost of revenue	45,073	31,216	139,728	86,798
Gross profit	133,312	99,373	361,509	282,832
Operating expenses:
Sales and marketing	117,051	69,666	411,915	203,300
Research and development	38,404	22,522	143,047	68,997
General and administrative	36,274	19,528	170,242	55,923
Total expenses	191,729	111,716	725,204	328,220
Loss from operations	(58,417)	(12,343)	(363,695)	(45,388)
Interest expense	(3,503)	(154)	(3,743)	(474)
Interest income and other income (expense), net	3,395	(1,225)	4,165	699
Loss before provision for (benefit from) income taxes	(58,525)	(13,722)	(363,273)	(45,163)
Provision for (benefit from) income taxes	(5,712)	783	(3,059)	761
Net loss	$ (52,813)	$ (14,505)	$ (360,214)	$ (45,924)
Net loss per share attributable to common stockholders, basic and diluted (in usd per share)	$ (0.31)	$ (0.45)	$ (2.90)	$ (1.49)
Weighted-average number of shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)	167,736	33,353	124,343	31,604
Other comprehensive loss:
Foreign currency translation (losses) gains, net of tax	$ (1,483)	$ 861	$ (6,896)	$ 3,694
Comprehensive loss	(54,296)	(13,644)	(367,110)	(42,230)
Stock-based compensation expense included in costs and expenses:
Stock-based compensation expense			361,707	23,513
Sales and marketing
Stock-based compensation expense included in costs and expenses:
Stock-based compensation expense	22,338	1,959	151,610	7,547
Research and development
Stock-based compensation expense included in costs and expenses:
Stock-based compensation expense	9,919	1,042	64,546	3,721
General and administrative
Stock-based compensation expense included in costs and expenses:
Stock-based compensation expense	13,515	3,113	109,165	10,806
Subscription
Revenue:
Total revenue	169,426	122,905	476,085	347,305
Cost of revenue:
Total cost of revenue	28,709	22,335	84,204	61,668
Subscription | Cost of revenue
Stock-based compensation expense included in costs and expenses:
Stock-based compensation expense	2,398	228	13,941	697
Professional services and other
Revenue:
Total revenue	8,959	7,684	25,152	22,325
Cost of revenue:
Total cost of revenue	16,364	8,881	55,524	25,130
Professional services and other | Cost of revenue
Stock-based compensation expense included in costs and expenses:
Stock-based compensation expense	$ 3,578	$ 253	$ 22,445	$ 742

Condensed Consolidated Statem_2

Condensed Consolidated Statement of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) Statement - 9 months ended Oct. 31, 2018 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Redeemable Convertible Preferred Stock
Beginning balance (in shares) at Jan. 31, 2018		35,699,843
Beginning balance at Jan. 31, 2018	$ (338,648)	$ 4	$ 160,265	$ 3,403	$ (502,320)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	1,868,821	1,869,000
Exercise of stock options	$ 15,365		15,365
Employee stock-based compensation expense	362,260		362,260
Non-employee stock-based compensation expense	886		886
Accretion of preferred stock	(353)		(353)
Issuance of common stock in connection with initial public offering, net of offering costs (in shares)		19,314,182
Issuance of common stock in connection with initial public offering, net of offering costs	525,299	$ 2	525,297
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering (in shares)		100,350,008
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering	547,854	$ 10	547,844
Conversion of preferred stock warrant to common stock warrant in connection with initial public offering	848		848
Equity component of Convertible Senior Notes	131,331		131,331
Purchase of capped calls related to issuance of Convertible Senior Notes	(67,563)		(67,563)
Exercise of warrants (in shares)		22,468
Exercise of warrants	0
Net loss	(360,214)				(360,214)
Foreign currency translation adjustment	(6,896)			(6,896)
Ending balance (in shares) at Oct. 31, 2018		157,255,000
Ending balance at Oct. 31, 2018	$ 810,169	$ 16	$ 1,676,180	$ (3,493)	$ (862,534)
Beginning balance (in shares) at Jan. 31, 2018	100,226,000					100,226,099
Beginning balance at Jan. 31, 2018	$ 547,501					$ 547,501
Increase (Decrease) in Temporary Equity [Roll Forward]
Accretion of preferred stock	(353)					$ 353
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering (in shares)						(100,226,099)
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering						$ (547,854)
Ending balance at Oct. 31, 2018	$ 0					$ 0
Ending balance (in shares) at Oct. 31, 2018	0					0

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Cash flows from operating activities:
Net loss	$ (360,214)	$ (45,924)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	26,024	23,703
Amortization of deferred contract acquisition and fulfillment costs	29,889	22,022
Amortization of debt discount and transaction costs	3,147	0
Stock-based compensation expense	361,707	23,513
Deferred income taxes	(7,347)	58
Other	(2,079)	(21)
Changes in operating assets and liabilities
Accounts receivable	1,366	12,962
Contract assets	2,774	(2,313)
Prepaid expenses and other current assets	(2,383)	(4,128)
Deferred contract acquisition and fulfillment costs	(52,545)	(32,222)
Other assets	2,002	(333)
Accounts payable	(5,990)	(5,545)
Accrued expenses	3,610	1,218
Accrued compensation	2,171	(1,753)
Contract liabilities	35,856	30,445
Deferred rent	277	(174)
Other liabilities	3,684	1,511
Net cash provided by operating activities	41,949	23,019
Cash flows from investing activities:
Cash paid for acquisition, net of acquired cash	(218,779)	0
Purchases of property and equipment	(19,096)	(15,692)
Proceeds from sale of business held for sale	0	467
Net cash used in investing activities	(237,875)	(15,225)
Cash flows from financing activities:
Proceeds from issuance of convertible senior notes, net of initial purchasers' discounts and transaction costs	560,756	0
Purchase of capped calls related to issuance of convertible senior notes	(67,563)	0
Proceeds from issuance of common stock in initial public offering, net of underwriting commissions	529,305	0
Proceeds from the exercise of stock options	15,365	21,946
Payment of deferred offering costs	(3,692)	0
Payment of holdback on prior acquisition	0	(390)
Net cash provided by financing activities	1,034,171	21,556
Effect of foreign exchange on cash, cash equivalents and restricted cash	(1,181)	1,572
Net increase in cash, cash equivalents and restricted cash	837,064	30,922
Cash, cash equivalents and restricted cash at beginning of period	257,436	191,244
Cash, cash equivalents and restricted cash at end of period	1,094,500	222,166
Supplemental disclosure:
Cash paid for interest	204	454
Cash paid for taxes	2,718	336
Non-cash investing and financing activities:
Property and equipment in accounts payable and other accrued liabilities	4,889	151
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering	547,854	0
Conversion of preferred stock warrant to common stock warrant in connection with initial public offering	848	0
Preferred stock accretion	353	1,097
Built-to-suit lease	$ 2,479	$ 0

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Oct. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Organization and Description of Business DocuSign, Inc. (“we,” “our” or “us”) was incorporated in the State of Washington in April 2003. We merged with and into DocuSign, Inc., a Delaware corporation, in March 2015. We provide a platform that enables businesses of all sizes to digitally prepare, execute and act on agreements, thereby simplifying and accelerating the process of doing business. Basis of Presentation and Principles of Consolidation Our condensed consolidated financial statements include the accounts of DocuSign, Inc. and our wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Our condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the applicable rules and regulations of the Securities and Exchange Commission (“SEC”). Therefore, these unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our prospectus dated April 26, 2018, as filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended (File No. 333-223990) (“Prospectus”). Our condensed consolidated financial statements are unaudited and have been prepared on a basis consistent with that used to prepare the audited annual consolidated financial statements and, in our opinion, include all adjustments of a normal recurring nature necessary for the fair statement of our financial position, results of operations and cash flows. Our condensed consolidated balance sheet as of January 31, 2018 was derived from audited financial statements but does not include all disclosures required by GAAP. The results of operations for the three and the nine months ended October 31, 2018 are not necessarily indicative of the results to be expected for the year ending January 31, 2019 . Our fiscal year ends on January 31. References to fiscal 2019 , for example, are to the fiscal year ending January 31, 2019 . Initial Public Offering On May 1, 2018, we completed our initial public offering ("IPO"), in which we issued and sold 19.3 million shares of common stock at price to the public of $29.00 per share, including 3.3 million shares of common stock purchased by the underwriters in the full exercise of the over-allotment option granted to them. Certain of our existing stockholders sold an additional 5.6 million shares at the public offering price. We received net proceeds of $524.2 million after deducting underwriting discounts and commissions of $ 30.8 million and offering expenses of $ 5.1 million . We did not receive any proceeds from the sale of shares by our stockholders. Upon the completion of our IPO, all 100.2 million shares of our convertible preferred stock automatically converted into an aggregate of 100.4 million shares of our common stock; all our outstanding warrants to purchase shares of convertible preferred stock converted into warrants to purchase 22,468 shares of common stock with the related warrant liability of $0.8 million reclassified into additional paid-in capital; and our Amended and Restated Certificate of Incorporation was filed and went in effect authorizing a total of 500.0 million shares of common stock and 10.0 million shares of preferred stock. Follow-On Offering On September 18, 2018, we completed our follow-on offering, in which certain stockholders sold 8.1 million shares of common stock. The price per share to the public was $55.00 . We did not receive any proceeds from the sale of shares by the selling stockholders. We incurred issuance costs of $1.3 million associated with the sale of such shares. Use of Estimates The preparation of financial statements in conformity with 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. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include those related to the allocation of revenue between recognized and deferred amounts, allowance for bad debts, goodwill, intangible assets, deferred contract acquisition costs, customer benefit period, fair value of financial instruments, valuation of stock-based compensation, valuation of common stock, f air value of the liability and equity components of the convertible notes, valuation of the build-to-suit lease, and the valuation allowance for deferred income taxes. Significant Accounting Policies Other than described below, there have been no changes to our significant accounting policies described in our Prospectus that have had a material impact on our consolidated financial statements and related notes. Stock-Based Compensation Compensation cost for all stock-based awards, including stock options and restricted stock units ("RSUs"), is measured at fair value on the date of grant and recognized over the service period. The fair value of stock options is estimated on the date of grant using a Black-Scholes model. The fair value of RSUs is estimated on the date of grant based on the fair value of our underlying common stock. We recognize compensation expense for stock options on a straight-line basis over the requisite service period. Compensation expense for RSUs granted prior to January 31, 2018, is amortized on a graded basis over the requisite service period as long as the performance condition in the form of a specified liquidity event is probable to occur. The liquidity event condition was satisfied upon the effectiveness of our registration statement on Form S-1 ("IPO Registration Statement") on April 26, 2018. On that date we recorded a cumulative stock-based compensation expense of $262.8 million using the accelerated attribution method for all the RSUs, for which the service condition has been fully satisfied as of April 26, 2018. The remaining unrecognized stock-based compensation expense related to the RSUs will be recorded over their remaining requisite service periods. During the nine months ended October 31, 2018 , we granted 0.6 million RSUs that are subject to performance-based vesting condition and a service-based condition. The performance-based conditions will be satisfied if our financial performance meets certain operating targets. We also granted 0.1 million RSUs that are subject to market-based vesting conditions and a service-based condition. The market-based conditions will be satisfied if certain milestones based on our common stock price are met. All other RSUs granted after January 31, 2018, vest on the satisfaction of service-based condition only. We recognize compensation expense for such RSUs on a straight-line basis over the requisite service period. Compensation expense is recognized net of forfeitures that are estimated at the time of grant and revised in subsequent periods if actual forfeitures differ from those estimates. We account for equity instruments issued to non-employees at fair value of the consideration received or fair value of the equity instrument issued, whichever is more reliably measurable. The measurement date of the fair value of the equity instrument issued is the earlier of the date on which the counterparty’s performance is complete or the date on which it is probable that performance will occur. Compensation expense related to stock-based awards issued to non-employees was $0.1 million and $0.4 million for the three months ended October 31, 2018 and 2017 and $0.9 million and $1.0 million for the nine months ended October 31, 2018 and 2017 . Determining the grant date fair value of options using the Black-Scholes option-pricing model requires management to make assumptions and judgments. These estimates involve inherent uncertainties and, if different assumptions had been used, stock-based compensation expense could have been materially different from the amounts recorded. Recent Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued accounting standards update ("ASU") No. 2016-02, Leases (Topic 842), which supersedes current guidance related to accounting for leases. This guidance is intended to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. In July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases. The ASU makes 16 technical corrections to the new leases standard and other accounting topics, alleviating unintended consequences from applying the new standard. It does not make any substantive changes to the core provisions or principles of the new standard. In July 2018, the FASB also issued ASU No. 2018-11, Leases (Topic 842). The ASU provides (1) an optional transition method that entities can use when adopting the standard and (2) a practical expedient that permits lessors to not separate nonlease components from the associated lease component if certain conditions are met. The standard is effective for public entities for annual and interim reporting periods beginning after December 15, 2018. Early adoption is permitted. The ASU can be adopted using modified retrospective approach as of the earliest period presented or as of the adoption date with the cumulative-effect adjustment to the opening balance recognized in retained earnings in the period of adoption. We are in the process of implementing changes to our processes and controls, in conjunction with our review of existing lease agreements, in order to adopt the new standard in the first quarter of fiscal 2020. We expect that the primary impact will relate to (1) the recognition of a right-of-use assets and lease liabilities on the balance sheet for substantially all our existing operating leases designated in Note 10 ; (2) the derecognition of existing assets and liabilities for sale-leaseback transactions arising from build-to-suit lease arrangements for which construction is complete and we are leasing the constructed asset that currently do not qualify for sale accounting, and (3) significant new disclosures about leasing activities. In February 2018, the FASB issued ASU No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220), which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act ("TCJA"). As the amendment only relates to the reclassification of the income tax effects of the TCJA, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. The standard is effective for annual and interim reporting periods beginning after December 15, 2018 for all entities. The amendment is to be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the TCJA is recognized. Early adoption is permitted. The adoption of the standard is not expected to have a material impact on our consolidated financial statements. In June 2018, the FASB issued ASU No. 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting. The ASU aligns the measurement and classification guidance for share-based payments to nonemployees with the guidance for share-based payments to employees, with certain exceptions. Under the guidance, the measurement of equity-classified nonemployee awards will be fixed at the grant date. The ASU is effective for public business entities in annual periods beginning after December 15, 2018, and interim periods within those years. Early adoption is permitted, including in an interim period, but not before an entity adopts the topic 606 revenue guidance. The adoption of the standard is not expected to have a material impact on our consolidated financial statements. In July 2018, the FASB issued ASU No. 2018-09, Codification Improvements, which clarifies, corrects errors in and makes improvements to several topics in the FASB Accounting Standard Codification. The transition and effective date guidance is based on the facts and circumstances of each amendment. Some of the amendments do not require transition guidance and were effective upon issuance of the ASU. Amendments that do have transition guidance are effective for public business entities for annual periods beginning after December 15, 2018. The adoption of the standard is not expected to have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), which modifies, removes and adds certain disclosure requirements on fair value measurements based on the FASB Concepts Statement, Conceptual Framework for Financial Reporting—Chapter 8: Notes to Financial Statements . The ASU is effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. Early adoption is permitted. We are in the process of evaluating the impact of the adoption of the ASU on our consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other— Internal-Use Software (Subtopic 350-40), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this ASU. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted. We are in the process of evaluating the impact of the adoption of the ASU on our consolidated financial statements.

Revenue and Performance Obligat

Revenue and Performance Obligations	9 Months Ended
	Oct. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue and Performance Obligations	Revenue and Performance Obligations Subscription revenue is recognized over time and accounted for approximately 95% and 94% of our revenue for the three months ended October 31, 2018 and 2017 and 95% and 94% of our revenue for the nine months ended October 31, 2018 and 2017 . The typical subscription term is one to three years. Most of our subscription contracts are non-cancelable over the contractual term. Customers typically have the right to terminate their contracts for cause, if we fail to perform. As of October 31, 2018 , the aggregate amount of the transaction price allocated to remaining performance obligations was $493.4 million , which consists of both billed and unbilled consideration that we expect to recognize as subscription revenue. We expect to recognize 52% of the transaction price in twelve months following October 31, 2018 , in our consolidated statement of operations and comprehensive loss with the remainder recognized thereafter. Contract Balances Contract assets represent amounts for which we have recognized revenue, pursuant to our revenue recognition policy, for contracts that have not yet been invoiced to our customers where there is a remaining performance obligation, typically for multi-year arrangements. Total contract assets were $13.4 million and $16.1 million as of October 31, 2018 and January 31, 2018 , of which $1.3 million and $1.9 million were noncurrent and included within "Other assets—noncurrent" on our consolidated balance sheets. The change in contract assets reflects the difference in timing between our satisfaction of remaining performance obligations and our contractual right to bill our customers. Contract liabilities consist of deferred revenue and include payments received in advance of performance under the contract. Such amounts are generally recognized as revenue over the contractual period. For the nine months ended October 31, 2018 and 2017 , we recognized revenue of $238.1 million and $164.8 million that was included in the corresponding contract liability balance at the beginning of the periods presented. The acquisition of SpringCM contributed $10.0 million as of September 4, 2018. We receive payments from customers based upon contractual billing schedules. We record accounts receivable when the right to consideration becomes unconditional. Payment terms on invoiced amounts are typically 30 days. Deferred Contract Acquisition and Fulfillment Costs The following table represents a rollforward of our deferred contract acquisition costs: Nine Months Ended October 31, (in thousands) 2018 2017 Beginning balance $ 77,344 $ 57,271 Additions to deferred contract acquisition costs 51,038 29,931 Amortization of deferred contract acquisition costs (28,561 ) (20,714 ) Ending balance $ 99,821 $ 66,488 Deferred contract acquisition costs, current $ 2,730 $ 1,437 Deferred contract acquisitions costs, noncurrent 97,091 65,051 Total $ 99,821 $ 66,488 The following table represents our contract fulfillment costs, which include third-party service fees: Nine Months Ended October 31, (in thousands) 2018 2017 Beginning balance $ 3,316 $ 788 Additions to deferred contract fulfillment costs 1,507 2,291 Amortization of deferred contract fulfillment costs (1,328 ) (1,308 ) Ending balance $ 3,495 $ 1,771 Deferred contract fulfillment costs, current $ 1,042 $ 397 Deferred contract fulfillment costs, noncurrent 2,453 1,374 Total $ 3,495 $ 1,771 Current deferred contract fulfillment costs are included in "Prepaid expense and other current assets" and noncurrent costs are included in "Other assets—noncurrent" on our consolidated balance sheets.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Oct. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements We carry certain assets and liabilities at fair value. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The three-tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs based on the observability as of the measurement date, is as follows: Level 1 Quoted prices in active markets for identical assets or liabilities; Level 2 Observable inputs other than the quoted prices in active markets for identical assets and liabilities; and Level 3 Unobservable inputs for which there is little or no market data, which require us to develop assumptions of what market participants would use in pricing the asset or liability. The following table summarizes our assets and liabilities that are measured at fair value on a recurring basis, by level, within the fair value hierarchy: (in thousands) Level 1 Level 2 Level 3 Total October 31, 2018 Cash and cash equivalents Money market funds $ 998,068 $ — $ — $ 998,068 January 31, 2018 Cash and cash equivalents Money market funds $ 122,663 $ — $ — $ 122,663 Other liabilities—noncurrent Warrant liabilities — — 445 445 Money market funds consist of cash equivalents with remaining maturities of three months or less at the date of purchase. We use quoted prices in active markets for identical assets or liabilities to determine fair value of our Level 1 investments in money market funds. Warrant liabilities as of January 31, 2018 consisted of outstanding warrants to purchase 22,468 shares of our Series B-1 preferred stock. These warrants were issued in connection with a certain loan and securities agreement previously entered into with Silicon Valley Bank. We estimated the fair value of our warrant liability using the Black-Scholes pricing model. The significant unobservable inputs used in the fair value measurement of the redeemable convertible preferred stock warrant liability are the fair value of the underlying stock at the valuation date and the estimated term of the warrant. The fair value was $0.4 million as of January 31, 2018 . All warrants to purchase shares of convertible preferred stock converted into 22,468 warrants to purchase common stock upon the closing of our IPO on May 1, 2018 and were exercised immediately. The related warrant liability was reclassified to additional paid-in capital as of that date. Convertible Senior Notes As of October 31, 2018 , the estimated fair value of our 0.5% Convertible Senior Notes with aggregate principal amount of $575.0 million was $540.5 million . We estimated the fair value based on the quoted market prices in an inactive market on the last trading day of the reporting period (Level 2). These Convertible Senior Notes are recorded at face value less unamortized debt discount and transaction costs on our consolidated balance sheets. Refer to Note 9 for further information.

Property and Equipment, Net

Property and Equipment, Net	9 Months Ended
	Oct. 31, 2018
Property, Plant and Equipment [Abstract]
Property and Equipment, Net	Property and Equipment, Net Property and equipment consisted of the following: (in thousands) October 31, 2018 January 31, 2018 Computer and network equipment $ 53,801 $ 54,087 Software, including capitalized software development costs 26,479 24,270 Furniture and office equipment 9,805 9,692 Leasehold improvements 37,297 37,494 127,382 125,543 Less: Accumulated depreciation (64,458 ) (66,160 ) 62,924 59,383 Work in progress 11,041 3,636 $ 73,965 $ 63,019 Depreciation expense associated with property and equipment was $6.5 million and $5.6 million for the three months ended October 31, 2018 and 2017 and $17.9 million and $16.1 million for the nine months ended October 31, 2018 and 2017 . As of October 31, 2018 , we capitalized $2.5 million related to the fair value of the Israel leased space and $1.3 million of construction costs in "Work-in-progress" under the build-to-suit lease guidance. The corresponding financing liability of $2.5 million , including interest, was recorded in " Other liabilities—noncurrent" on the consolidated balance sheets. Refer to Note 10 for additional information.

Acquisition of SpringCM Inc.

Acquisition of SpringCM Inc.	9 Months Ended
	Oct. 31, 2018
Business Combinations [Abstract]
Acquisition of SpringCM Inc.	Acquisition of SpringCM Inc. On September 4, 2018 , we completed the acquisition of SpringCM Inc. ("SpringCM"), a cloud-based document generation and contract lifecycle management software company based in Chicago, Illinois. With the addition of SpringCM's capabilities in document generation, redlining, advanced document management and end-to-end agreement workflow, the deal further accelerates the broadening of our solution beyond e-signature to the rest of the agreement process—from preparing to signing, acting-on and managing agreements. Under the terms of the agreement, we acquired SpringCM for approximately $218.8 million in cash, excluding cash acquired, working capital and transaction cost adjustments. Of the cash paid at closing, $8.2 million will be held in escrow for an 18 -month period after closing to secure our indemnification rights under the Merger Agreement. Additionally, we granted certain continuing employees of SpringCM RSUs with a service and performance condition covering up to 0.5 million shares that will be accounted for as a post-acquisition compensation expense over the vesting period. The performance-based conditions will be satisfied upon SpringCM meeting certain revenue targets. We accounted for the transaction as a business combination using the acquisition method of accounting. We allocated the purchase price to the tangible and identifiable intangible assets acquired and liabilities assumed based on their respective estimated fair values on the acquisition date. Fair values were determined using the valuation performed by management. Excess purchase price consideration was recorded as goodwill and is primarily attributable to the assembled workforce and expanded market opportunities when integrating SpringCM’s capabilities in document generation, redlining, advanced document management and end-to-end agreement workflow with our other offerings. We engaged third party valuation specialists to aid our analysis of the fair value of the acquired intangibles. All estimates, key assumptions, and forecasts were either provided by or reviewed by us. While we chose to utilize a third-party valuation specialist for assistance, the fair value analysis and related valuations reflect the conclusions of management and not those of any third party. The fair values of the assets acquired and liabilities assumed were determined using the market, income and cost approaches. The purchase price allocation was prepared on a preliminary basis and is subject to further adjustments as additional information becomes available concerning the fair value of the assets acquired and liabilities assumed, largely with respect to working capital adjustments. Any adjustments to the purchase price allocation will be made as soon as practicable but no later than one year from the acquisition date. The following table summarizes the acquisition date fair values of assets acquired and liabilities assumed at the date of acquisition: (in thousands) September 4, 2018 Cash and cash equivalents $ 6,950 Other assets 10,542 Property and equipment 6,108 Goodwill 159,292 Intangible assets 73,000 Contract liabilities (9,973 ) Other liabilities (12,854 ) Deferred tax liability (7,336 ) $ 225,729 None of the goodwill recognized upon acquisition is deductible for U.S. federal income tax purposes. The estimated useful lives, primarily based on the expected period of benefit to us, and fair values of the identifiable intangible assets at acquisition date were as follows: (in thousands, except years) Estimated Fair Value Expected Useful Life Existing technology $ 11,900 3 years Customer relationships—subscription 54,200 9 years Backlog—subscription 6,400 2 years Tradenames / trademarks 500 1 year Total preliminary intangible assets $ 73,000 In the nine months ended October 31, 2018 , we incurred acquisition costs of $1.8 million . These costs include legal, accounting fees and other costs directly related to the acquisition and are classified within operating expenses in our condensed consolidated statements of operations. We included the results of operations of SpringCM in our consolidated statements of operations from the acquisition date. In the three and nine months ended October 31, 2018 , our condensed consolidated statement of operations includes revenues of $3.8 million . Due to the continued integration of the combined businesses, the information needed to determine earnings was unavailable. The following unaudited pro forma information has been prepared for illustrative purposes only and assumes the acquisition occurred on February 1, 2017. It includes pro forma adjustments related to the amortization of acquired intangible assets, share-based compensation expense, professional services revenue and contract acquisitions costs adjustments under the new revenue recognition standard, and contract liabilities fair value adjustment. The unaudited pro forma results have been prepared based on estimates and assumptions, which we believe are reasonable, however, they are not necessarily indicative of the consolidated results of operations had the acquisition occurred on February 1, 2017, or of future results of operations: Three Months Ended October 31, Nine Months Ended October 31, (in thousands, except per share data) 2018 2017 2018 2017 Revenue $ 181,490 $ 136,018 $ 517,507 $ 384,356 Net loss (57,433 ) (23,578 ) (384,917 ) (65,652 ) Net loss per share attributable to common stockholders, basic and diluted (0.34 ) (0.72 ) (3.10 ) (2.11 )

Goodwill and Intangible Assets,

Goodwill and Intangible Assets, Net	9 Months Ended
	Oct. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets, Net	Goodwill and Intangible Assets, Net The changes in the carrying amount of goodwill for the nine months ended October 31, 2018 were as follows (in thousands): Balance at January 31, 2018 $ 37,306 Additions—SpringCM 159,292 Foreign currency translation (2,065 ) Balance at October 31, 2018 $ 194,533 Intangible assets consisted of the following: As of October 31, 2018 As of January 31, 2018 (in thousands) Weighted-average Remaining Useful Life (Years) Estimated Fair Value Accumulated Amortization Acquisition-related Intangibles, Net Estimated Fair Value Accumulated Amortization Acquisition-related Intangibles, Net Existing technology 2.7 $ 31,594 $ (19,290 ) $ 12,304 $ 19,694 $ (15,953 ) $ 3,741 Tradenames / trademarks 1.1 2,419 (1,643 ) 776 1,919 (1,294 ) 625 Customer contracts & related relationships 8.5 65,782 (9,061 ) 56,721 11,582 (6,411 ) 5,171 Certifications 1.8 6,917 (4,500 ) 2,417 6,917 (3,462 ) 3,455 Maintenance contracts & related relationships 1.6 1,498 (1,029 ) 469 1,498 (804 ) 694 Backlog—Subscription 1.9 6,400 (491 ) 5,909 — — — 6.8 $ 114,610 $ (36,014 ) 78,596 $ 41,610 $ (27,924 ) 13,686 Cumulative translation adjustment 565 462 Total $ 79,161 $ 14,148 Amortization of finite-lived intangible assets for the three and nine months ended October 31, 2018 and 2017 was as follows: Three Months Ended October 31, Nine Months Ended October 31, (in thousands) 2018 2017 2018 2017 Cost of subscription revenue $ 1,632 $ 1,691 $ 4,303 $ 5,079 Sales and marketing 2,257 1,015 3,787 2,520 Total $ 3,889 $ 2,706 $ 8,090 $ 7,599 As of October 31, 2018 , future amortization of finite-lived intangibles that will be recorded in cost of revenue and operating expenses is estimated as follows, excluding cumulative translation adjustment (in thousands): Fiscal 2019, remainder $ 5,026 Fiscal 2020 17,712 Fiscal 2021 13,815 Fiscal 2022 8,369 Fiscal 2023 6,022 Thereafter 27,652 Total $ 78,596

Contract Balances

Contract Balances	9 Months Ended
	Oct. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract Balances	Revenue and Performance Obligations Subscription revenue is recognized over time and accounted for approximately 95% and 94% of our revenue for the three months ended October 31, 2018 and 2017 and 95% and 94% of our revenue for the nine months ended October 31, 2018 and 2017 . The typical subscription term is one to three years. Most of our subscription contracts are non-cancelable over the contractual term. Customers typically have the right to terminate their contracts for cause, if we fail to perform. As of October 31, 2018 , the aggregate amount of the transaction price allocated to remaining performance obligations was $493.4 million , which consists of both billed and unbilled consideration that we expect to recognize as subscription revenue. We expect to recognize 52% of the transaction price in twelve months following October 31, 2018 , in our consolidated statement of operations and comprehensive loss with the remainder recognized thereafter. Contract Balances Contract assets represent amounts for which we have recognized revenue, pursuant to our revenue recognition policy, for contracts that have not yet been invoiced to our customers where there is a remaining performance obligation, typically for multi-year arrangements. Total contract assets were $13.4 million and $16.1 million as of October 31, 2018 and January 31, 2018 , of which $1.3 million and $1.9 million were noncurrent and included within "Other assets—noncurrent" on our consolidated balance sheets. The change in contract assets reflects the difference in timing between our satisfaction of remaining performance obligations and our contractual right to bill our customers. Contract liabilities consist of deferred revenue and include payments received in advance of performance under the contract. Such amounts are generally recognized as revenue over the contractual period. For the nine months ended October 31, 2018 and 2017 , we recognized revenue of $238.1 million and $164.8 million that was included in the corresponding contract liability balance at the beginning of the periods presented. The acquisition of SpringCM contributed $10.0 million as of September 4, 2018. We receive payments from customers based upon contractual billing schedules. We record accounts receivable when the right to consideration becomes unconditional. Payment terms on invoiced amounts are typically 30 days. Deferred Contract Acquisition and Fulfillment Costs The following table represents a rollforward of our deferred contract acquisition costs: Nine Months Ended October 31, (in thousands) 2018 2017 Beginning balance $ 77,344 $ 57,271 Additions to deferred contract acquisition costs 51,038 29,931 Amortization of deferred contract acquisition costs (28,561 ) (20,714 ) Ending balance $ 99,821 $ 66,488 Deferred contract acquisition costs, current $ 2,730 $ 1,437 Deferred contract acquisitions costs, noncurrent 97,091 65,051 Total $ 99,821 $ 66,488 The following table represents our contract fulfillment costs, which include third-party service fees: Nine Months Ended October 31, (in thousands) 2018 2017 Beginning balance $ 3,316 $ 788 Additions to deferred contract fulfillment costs 1,507 2,291 Amortization of deferred contract fulfillment costs (1,328 ) (1,308 ) Ending balance $ 3,495 $ 1,771 Deferred contract fulfillment costs, current $ 1,042 $ 397 Deferred contract fulfillment costs, noncurrent 2,453 1,374 Total $ 3,495 $ 1,771 Current deferred contract fulfillment costs are included in "Prepaid expense and other current assets" and noncurrent costs are included in "Other assets—noncurrent" on our consolidated balance sheets.

Deferred Contract Acquisition a

Deferred Contract Acquisition and Fulfillment Costs	9 Months Ended
	Oct. 31, 2018
Revenue from Contract with Customer [Abstract]
Deferred Contract Acquisition and Fulfillment Costs	Revenue and Performance Obligations Subscription revenue is recognized over time and accounted for approximately 95% and 94% of our revenue for the three months ended October 31, 2018 and 2017 and 95% and 94% of our revenue for the nine months ended October 31, 2018 and 2017 . The typical subscription term is one to three years. Most of our subscription contracts are non-cancelable over the contractual term. Customers typically have the right to terminate their contracts for cause, if we fail to perform. As of October 31, 2018 , the aggregate amount of the transaction price allocated to remaining performance obligations was $493.4 million , which consists of both billed and unbilled consideration that we expect to recognize as subscription revenue. We expect to recognize 52% of the transaction price in twelve months following October 31, 2018 , in our consolidated statement of operations and comprehensive loss with the remainder recognized thereafter. Contract Balances Contract assets represent amounts for which we have recognized revenue, pursuant to our revenue recognition policy, for contracts that have not yet been invoiced to our customers where there is a remaining performance obligation, typically for multi-year arrangements. Total contract assets were $13.4 million and $16.1 million as of October 31, 2018 and January 31, 2018 , of which $1.3 million and $1.9 million were noncurrent and included within "Other assets—noncurrent" on our consolidated balance sheets. The change in contract assets reflects the difference in timing between our satisfaction of remaining performance obligations and our contractual right to bill our customers. Contract liabilities consist of deferred revenue and include payments received in advance of performance under the contract. Such amounts are generally recognized as revenue over the contractual period. For the nine months ended October 31, 2018 and 2017 , we recognized revenue of $238.1 million and $164.8 million that was included in the corresponding contract liability balance at the beginning of the periods presented. The acquisition of SpringCM contributed $10.0 million as of September 4, 2018. We receive payments from customers based upon contractual billing schedules. We record accounts receivable when the right to consideration becomes unconditional. Payment terms on invoiced amounts are typically 30 days. Deferred Contract Acquisition and Fulfillment Costs The following table represents a rollforward of our deferred contract acquisition costs: Nine Months Ended October 31, (in thousands) 2018 2017 Beginning balance $ 77,344 $ 57,271 Additions to deferred contract acquisition costs 51,038 29,931 Amortization of deferred contract acquisition costs (28,561 ) (20,714 ) Ending balance $ 99,821 $ 66,488 Deferred contract acquisition costs, current $ 2,730 $ 1,437 Deferred contract acquisitions costs, noncurrent 97,091 65,051 Total $ 99,821 $ 66,488 The following table represents our contract fulfillment costs, which include third-party service fees: Nine Months Ended October 31, (in thousands) 2018 2017 Beginning balance $ 3,316 $ 788 Additions to deferred contract fulfillment costs 1,507 2,291 Amortization of deferred contract fulfillment costs (1,328 ) (1,308 ) Ending balance $ 3,495 $ 1,771 Deferred contract fulfillment costs, current $ 1,042 $ 397 Deferred contract fulfillment costs, noncurrent 2,453 1,374 Total $ 3,495 $ 1,771 Current deferred contract fulfillment costs are included in "Prepaid expense and other current assets" and noncurrent costs are included in "Other assets—noncurrent" on our consolidated balance sheets.

Convertible Senior Notes

Convertible Senior Notes	9 Months Ended
	Oct. 31, 2018
Debt Disclosure [Abstract]
Convertible Senior Notes	Convertible Senior Notes In September 2018, we issued $575.0 million aggregate principal amount of 0.5% Convertible Senior Notes due in 2023 (the Notes), including the initial purchasers’ exercise in full of their option to purchase an additional $75.0 million principal amount of the Notes, in a private placement to qualified institutional buyers exempt from registration under the Securities Act. The net proceeds from the issuance of the Notes were $560.8 million after deducting the initial purchasers’ discounts and transaction costs. The Notes are governed by an indenture (the “Indenture”) between us, as the issuer, and U.S. Bank National Association, as trustee. The Notes are our senior unsecured obligations and rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the Notes; equal in right of payment to any of our unsecured indebtedness then existing and future liabilities that are not so subordinated; effectively junior in right of payment to any of our secured indebtedness, to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries. The Indenture does not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness, or the issuance or repurchase of securities by us or any of our subsidiaries. The Notes mature on September 15, 2023 unless earlier repurchased or redeemed by us or earlier converted in accordance with their terms prior to the maturity date. Interest is payable semi-annually in arrears on March 15 and September 15 of each year, beginning on March 15, 2019. The Notes have an initial conversion rate of 13.9860 shares of our common stock per $1,000 principal amount of Notes, which is equal to an initial conversion price of approximately $71.50 per share of our common stock and is subject to adjustment in some events. Following certain corporate events that occur prior to the maturity date or following our issuance of a notice of redemption, we will increase the conversion rate for a holder who elects to convert its Notes in connection with such corporate event or during the related redemption period in certain circumstances. Additionally, upon the occurrence of a corporate event that constitutes a “fundamental change” per the Indenture, holders of the Notes may require us to repurchase for cash all or a portion of their Notes at a purchase price equal to 100% of the principal amount of the Notes plus accrued and unpaid interest. On or after June 15, 2023, until the close of business on September 13, 2023, holders may convert all or any portion of their Notes at any time regardless of whether the conditions set forth below have been met. Upon conversion, holders will receive cash, shares of our common stock or a combination of cash and shares of our common stock, at our election. Holders of the Notes may convert all or any portion of their Notes at any time prior to the close of business on June 14, 2023, in integral multiples of $1,000 principal amount, only under the following circumstances: • During any fiscal quarter commencing after the fiscal quarter ending on January 31, 2019 (and only during such fiscal quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price on each applicable trading day; • During the 5 -business day period after any 10 consecutive trading day period (the “measurement period”) in which the trading price as defined in the Indenture per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate on each such trading day; • If we call any or all of the notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or • Upon the occurrence of specified corporate events described in the Indenture. We may redeem for cash or shares all or any portion of the Notes, at our option, beginning on or after September 20, 2021 if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price on each applicable trading day. As of October 31, 2018 , the condition allowing holders of the Notes to convert have not been met and therefore the Notes are not yet convertible. We account for the Notes as separate liability and equity components. We determined the carrying amount of the liability component as the present value of its cash flows using a discount rate of 6% based on comparable convertible transactions for similar companies. The carrying amount of the equity component representing the conversion option was $134.7 million and was calculated by deducting the carrying value of the liability component from the principal amount of the Notes as a whole. This difference represents a debt discount that is amortized to interest expense over the term of the Notes using the effective interest rate method. The equity component is not remeasured as long as it continues to meet the conditions for equity classification. We allocate transaction costs related to the issuance of the Notes to the liability and equity components using the same proportions as the initial carrying value of the Notes. Transaction costs attributable to the liability component were $10.9 million and are being amortized to interest expense using the effective interest method over the term of the Notes. Transaction costs attributable to the equity components were $3.3 million and are netted with the equity component of the Notes in stockholders’ equity. The net carrying value of the liability component of the Notes was as follows: (in thousands) October 31, 2018 Principal $ 575,000 Less: unamortized debt discount (131,756 ) Less: unamortized transaction costs (10,672 ) Net carrying amount $ 432,572 The net carrying amount of the equity component of the Notes was as follows: (in thousands) October 31, 2018 Proceeds allocated to the conversion option (debt discount) $ 134,667 Less: transaction costs (3,336 ) Net carrying amount $ 131,331 The interest expense recognized related to the Notes was as follows: (in thousands) Three and Nine Months Ended October 31, 2018 Contractual interest expense $ 347 Amortization of debt discount 2,911 Amortization of transaction costs 236 Total $ 3,494 Capped Calls In connection with the offering of the Notes, we entered into privately-negotiated capped call transactions ("Capped Calls") with certain counterparties. The Capped Calls each have an initial strike price of approximately $71.50 per share, subject to certain adjustments, which corresponds to the initial conversion price of the Notes. The Capped Calls have initial cap prices of $110.00 per share, subject to certain adjustments. The Capped Calls cover, subject to anti-dilution adjustments, approximately 8.0 million shares of our common stock. The Capped Calls are generally intended to reduce or offset the potential dilution to our common stock upon any conversion of the Notes with such reduction or offset, as the case may be, subject to a cap based on the cap price. As the Capped Call transactions are considered indexed to our own stock and are considered equity classified, they are recorded in stockholders’ equity and are not accounted for as derivatives. The cost of $67.6 million incurred in connection with the Capped Calls was recorded as a reduction to additional paid-in capital. Impact on Earnings Per Share The Notes will not have an impact on our diluted earnings per share until the average market price of our common stock exceeds the conversion price of $110.00 per share, as we intend and have the ability to settle the principal amount of the Notes in cash upon conversion. We are required under the treasury stock method to compute the potentially dilutive shares of common stock related to the Notes for periods we report net income. However, upon conversion, there will be no economic dilution from the Notes until the average market price of our common stock exceeds the cap price of $110.00 per share, as exercise of the Capped Calls offsets any dilution from the Notes from the conversion price up to the cap price. Capped Calls are excluded from the calculation of diluted earnings per share, as they would be antidilutive under the treasury stock method.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Leases We lease office space under noncancelable operating lease agreements that expire at various dates through June 2027 . Some operating leases contain escalation provisions for adjustments in the consumer price index. We are responsible for maintenance, insurance and property taxes. We recognize rent expense on a straight-line basis over the defined lease periods. Rent expense under operating leases amounted to $5.3 million and $4.5 million for the three months ended October 31, 2018 and 2017 and $14.4 million and $13.3 million for the nine months ended October 31, 2018 and 2017 . We entered into five leases during the nine months ended October 31, 2018 . The future minimum annual lease payments as of October 31, 2018 , related to the lease agreements were as follows (in thousands): Fiscal 2019, remainder $ 4,699 Fiscal 2020 20,741 Fiscal 2021 20,267 Fiscal 2022 19,356 Fiscal 2023 19,797 Thereafter 45,221 Total minimum lease payments $ 130,081 Israel Build-to-Suit Lease In July 2018, we entered into a long-term lease of a new-construction office space in Giv'at Shmuel, Israel. The lease has a term of 10 years with an option to cancel after five years and six months and an option to extend for five years. Since the office space was delivered to us as a cold shell and we are performing construction activities, for accounting purposes only, we are deemed to be the owner of the entire project, including the office space shell. In August 2018, upon commencement of the construction, we began to capitalize the related costs, including the fair value of the office space shell, as a build-to-suit property within "Property and equipment, net" and recognize a corresponding build-to-suit lease obligation, including interest. Fair value of the office space shell was estimated at $2.5 million using comparable market prices per square foot for similar space for public real estate transactions in the surrounding area. It is a Level 2 fair value measure. As of October 31, 2018 , $ 3.8 million was capitalized for the building and construction costs. Other Obligations As of October 31, 2018 , we had unused letters of credit outstanding associated with our various operating leases totaling $9.1 million . We have entered into certain noncancelable contractual arrangements that require future purchases of goods and services. These arrangements primarily relate to cloud infrastructure support and sales and marketing activities. As of October 31, 2018 , our noncancelable contractual obligations with a remaining term of more than one year were as follows (in thousands): Fiscal 2019, remainder $ 932 Fiscal 2020 3,645 Fiscal 2021 2,229 Fiscal 2022 855 Fiscal 2023 898 Thereafter 5,499 Total $ 14,058 Indemnification We enter into indemnification provisions under our agreements with other companies in the ordinary course of business, including business partners, contractors and parties performing our research and development. Pursuant to these arrangements, we agree to indemnify and defend the indemnified party for certain claims and related losses suffered or incurred by the indemnified party from actual or threatened third-party claim because of our activities. The duration of these indemnification agreements is generally perpetual. The maximum potential amount of future payments we could be required to make under these indemnifications is not determinable. Historically, we have not incurred material costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, we believe the fair value of these indemnification agreements is not material as of October 31, 2018 and January 31, 2018. We maintain commercial general liability insurance and product liability insurance to offset certain of our potential liabilities under these indemnification agreements. We have entered into indemnification agreements with each of our directors and executive officers. These agreements require us to indemnify such individuals, to the fullest extent permitted by Delaware law, for certain liabilities to which they may become subject as a result of their affiliation with us. Claims and Litigation From time to time, we may be subject to legal proceedings, claims and litigations made against us in the ordinary course of business. We are not currently a party to any legal proceedings or are aware of any pending or threatened litigations, that would have a material adverse effect to our financial condition, results of operations, or cash flows, should such litigation be resolved unfavorably.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Oct. 31, 2018
Equity [Abstract]
Stockholders' Equity	Stockholders' Equity Equity Incentive Plans We maintain three stock-based compensation plans: the 2018 Equity Incentive Plan ("2018 Plan"), the Amended and Restated 2011 Equity Incentive Plan (“2011 Plan”) and the Amended and Restated 2003 Stock Plan (“2003 Plan”). Our board of directors adopted, and our stockholders approved the 2018 Plan during the nine months ended October 31, 2018 . The 2018 Plan went into effect in April 2018, upon the effectiveness of our IPO Registration Statement. This plan serves as a successor to the 2011 Plan and 2003 Plan and provides for the grant of stock-based awards to our employees, directors and consultants. No additional awards under the 2011 Plan or 2003 Plan will be made as of the effective date of the 2018 Plan. Outstanding awards under these two plans continue to be subject to the terms and conditions of the respective plans. Shares available for grant under the 2011 Plan that were reserved but not issued as of the effective date of the 2018 Plan were added to the reserves of the 2018 Plan. Any shares subject to outstanding awards originally granted under the 2011 Plan that: (i) expire or terminate for any reason prior to exercise or settlement; (ii) are forfeited because of the failure to meet a contingency or condition required to vest such shares or otherwise return to the Company; or (iii) are reacquired, withheld (or not issued) to satisfy a tax withholding obligation in connection with an award or to satisfy the purchase price or exercise price of a stock award shall become available for future issuance pursuant to the 2018 Plan. As of October 31, 2018 , 12.2 million shares were available for future issuance under the 2018 Plan. The number of shares reserved under the 2018 Plan will automatically increase on the first day of each fiscal year, starting on February 1, 2019 and continuing through February 1, 2028, in an amount equal to (i) 5% of the total number of shares of our capital stock outstanding on January 31st of the preceding fiscal year or (ii) a lesser number of shares as determined by our board of directors. Stock Options Option activity for the nine months ended October 31, 2018 , was as follows: (in thousands, except per share data) Number of Options Outstanding Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Balances at January 31, 2018 19,832 $ 11.44 6.62 $ 152,754 Options exercised (1,869 ) 8.18 Options canceled/expired (334 ) 11.54 Balances at October 31, 2018 17,629 $ 11.78 6.01 $ 531,681 Vested and expected to vest at October 31, 2018 17,376 $ 11.70 5.98 $ 525,517 Exercisable at October 31, 2018 14,754 $ 10.70 5.70 $ 460,871 As of October 31, 2018 , our total unrecognized compensation cost related to stock option grants was $18.5 million . We expect to recognize this expense over the remaining weighted-average period of approximately 1.6 years. RSUs Substantially all the RSUs that we have issued through January 31, 2018 vest upon the satisfaction of both service-based and performance-based vesting conditions. The service-based condition is typically satisfied over a four -year service period. The performance-based condition related to these awards was satisfied upon the effectiveness of our IPO Registration Statement on April 26, 2018. On that date we recorded a cumulative stock-based compensation expense of $262.8 million using the accelerated attribution method for all the RSUs with the service condition fully satisfied. During the nine months ended October 31, 2018 , we granted 0.7 million RSUs that are subject to either performance-based or market-based vesting conditions and a service-based condition. The performance-based conditions will be satisfied if our financial performance meets certain operating targets. The market-based conditions will be satisfied if certain milestones based on our common stock price are met. All other RSUs granted after January 31, 2018 vest on the satisfaction of a service-based condition only. RSU activity for the nine months ended October 31, 2018 , was as follows: (in thousands, except per share data) Number of Units Weighted-Average Grant Date Fair Value Unvested at January 31, 2018 23,081 $ 17.54 Granted 8,576 54.77 Vested (11,376 ) 18.65 Canceled (1,028 ) 23.81 Unvested at October 31, 2018 19,253 $ 32.48 As of October 31, 2018 , our total unrecognized compensation cost related to RSUs was $422.5 million . We expect to recognize this expense over the remaining weighted-average period of approximately 2.1 years. 2018 Employee Stock Purchase Plan In the nine months ended October 31, 2018 , our board of directors adopted, and our stockholders approved the 2018 Employee Stock Purchase Plan (“2018 ESPP”). In April 2018, the 2018 ESPP went into effect upon the effectiveness of our IPO Registration Statement. Subject to any limitations contained therein, the 2018 ESPP allows eligible employees to contribute, normally through payroll deductions, up to 15% of their earnings for the purchase our common stock at a discounted price per share. The 2018 ESPP provides for separate six -month offering periods. The initial offering period will run from September 15, 2018 through March 14, 2019. Compensation expense related to the ESPP was $1.0 million for the three and nine months ended October 31, 2018 . A total of 3.8 million shares of common stock were reserved for issuance under the 2018 ESPP. As of October 31, 2018 , no shares of our common stock have been purchased under the 2018 ESPP. The number of shares reserved under the 2018 ESPP will automatically increase on the first day of each fiscal year, starting on February 1, 2019 and continuing through February 1, 2028, in an amount equal to the lesser of (i) 1% of the total number of shares of our common stock outstanding on January 31 of the preceding fiscal year, (ii) 3.8 million shares, or (iii) a lesser number of shares determined by our board of directors.

Net Loss per Share Attributable

Net Loss per Share Attributable to Common Stockholders	9 Months Ended
	Oct. 31, 2018
Earnings Per Share [Abstract]
Net Loss per Share Attributable to Common Stockholders	Net Loss per Share Attributable to Common Stockholders The following table presents the calculation of basic and diluted net loss per share attributable to common stockholders for periods presented: Three Months Ended October 31, Nine Months Ended October 31, (in thousands, except per share data) 2018 2017 2018 2017 Numerator: Net loss $ (52,813 ) $ (14,505 ) $ (360,214 ) $ (45,924 ) Less: preferred stock accretion — (376 ) (353 ) (1,097 ) Net loss attributable to common stockholders $ (52,813 ) $ (14,881 ) $ (360,567 ) $ (47,021 ) Denominator: Weighted-average common shares outstanding 167,736 33,353 124,343 31,604 Net loss per share attributable to common stockholders: Basic and diluted $ (0.31 ) $ (0.45 ) $ (2.90 ) $ (1.49 ) Outstanding potentially dilutive securities that were excluded from the diluted per share calculations because they would have been antidilutive are as follows: As of October 31, (in thousands) 2018 2017 Convertible preferred stock as-converted — 100,350 Stock options 17,629 21,840 Warrants to purchase convertible preferred stock — 22 Warrants to purchase common stock — 18 RSUs 18,598 — Total antidilutive securities 36,227 122,230 The table above does not include 0.7 million RSUs and 22.2 million RSUs outstanding as of October 31, 2018 and October 31, 2017 , as these RSUs are subject to operating and stock price targets or a liquidity event performance condition that was not considered probable as of that period.

Income Taxes

Income Taxes	9 Months Ended
	Oct. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our quarte rly provision for income taxes is based on an estimated effective annual income tax rate. It includes the tax impact of certain unusual or infrequently occurring items, if any, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, in the interim period in which they occur. We had a tax benefit of $5.7 million for the three months ended October 31, 2018 , compared to a provision for income taxes of $0.8 million for the three months ended October 31, 2017 . We had a tax benefit of $3.1 million for the nine months ended October 31, 2018 compared to a provision for income taxes of $0.8 million for the nine months ended October 31, 2017 . During the three months October 31, 2018 , we recorded approximately $33.0 million of additional net deferred tax liabilities related to the SpringCM acquisition. These additional deferred tax liabilities create a new source of taxable income, thereby requiring us to release a portion of our deferred tax asset valuation allowance with a related reduction in income tax expense of $7.4 million . This tax benefit was partially offset by an increase in foreign tax expense, resulting from higher year-over-year earnings in certain foreign jurisdictions as we continue to scale our foreign operations to support our ongoing international growth. In December 2017, the TCJA was enacted into law. The new legislation contains several key tax provisions that affected us, including a reduction of the federal corporate income tax rate to 21% effective January 1, 2018. We are required to recognize the effect of the tax law changes in the period of enactment, such as re-measuring our U.S. deferred tax assets and liabilities and our valuation allowance against our net U.S. deferred tax assets. In December 2017, the SEC staff issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the 2017 Tax Cuts and Jobs Act ("SAB 118"), added by the FASB to Income taxes (Topic 740) in February 2018, which allows us to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. As part of the transition to the new territorial tax system, the TCJA imposes a one-time repatriation tax on deemed repatriation of historical earnings of foreign subsidiaries. Based on the current evaluation of our operations, no repatriation tax charge is anticipated due to negative earnings and profits in our foreign subsidiaries. We recognized provisional tax impacts related to the revaluation of deferred tax assets and liabilities and corresponding valuation allowances in our consolidated financial statements for the year ended January 31, 2018 . The ultimate impact may differ from those provisional amounts, possibly materially, due to, among other things, additional analysis, changes in interpretations and assumptions we have made, additional regulatory guidance that may be issued, and actions we may take because of the TCJA. Any adjustments made to the provisional amounts under SAB 118 should be recorded as discrete adjustments in the period identified (not to extend beyond the one-year measurement provided in SAB 118). During the three and nine months ended October 31, 2018 , we did not make any adjustments to our provisional amounts included in our consolidated financial statements for the year ended January 31, 2018 . Any adjustments are expected to be completed within the measurement period. As of October 31, 2018 , we were not able to reasonably estimate, and therefore have not recorded, deferred taxes for the Global Intangible Low-taxed Income ("GILTI") provisions. We have not yet determined our policy election with respect to whether to record deferred taxes for basis differences expected to reverse because of the GILTI provisions in future periods or use the period cost method. We have, however, included an estimate of the current GILTI impact in our tax provision for fiscal 2019. We review the likelihood that we will realize the benefit of our deferred tax assets and, therefore, the need for valuation allowances, on a quarterly basis. There is no corresponding income tax benefit recognized with respect to losses incurred and no corresponding income tax expense recognized with respect to earnings generated in jurisdictions with a valuation allowance. This causes variability in our effective tax rate. We intend to maintain the valuation allowances until it is more likely than not that the net deferred tax assets will be realized. As of October 31, 2018 , our gross uncertain tax benefits totaled $8.1 million , including related accrued interest and penalties, all of which would impact the effective tax rate if recognized. We are subject to taxation in the United States and various state and foreign jurisdictions. Earnings from international activities are subject to local country income tax. The material jurisdictions where we are subject to potential examination by taxing authorities include the United States, California and Israel. We are currently under an income tax examination by the Israel Tax Authority for tax years 2013 through 2016. We are not currently under audit by the Internal Revenue Service or any similar taxing authority in any other material jurisdiction. We believe that adequate amounts have been reserved in all jurisdictions.

Geographic Information

Geographic Information	9 Months Ended
	Oct. 31, 2018
Segment Reporting [Abstract]
Geographic Information	Geographic Information We operate in one operating and one reportable segment as we only report financial information on an aggregate and consolidated basis to the Chief Executive Officer, who is our chief operating decision maker. Revenue by geography is generally based on the address of the customer as specified in our master subscription agreement. Revenue by geographic area were as follows: Three Months Ended October 31, Nine Months Ended October 31, (in thousands) 2018 2017 2018 2017 United States $ 147,677 $ 106,577 $ 416,034 $ 307,164 International 30,708 24,012 85,203 62,466 Total revenue $ 178,385 $ 130,589 $ 501,237 $ 369,630 No single country other than the United States had revenue greater than 10% of total revenue for the three and nine months ended October 31, 2018 and 2017 . Our property and equipment by geographic area were as follows: (in thousands) October 31, 2018 January 31, 2018 United States $ 58,976 $ 51,023 International 14,989 11,996 Total property and equipment $ 73,965 $ 63,019

Subsequent Events

Subsequent Events	9 Months Ended
	Oct. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On November 15, 2018, subsequent to quarter end, we settled 12.3 million RSUs for which the service condition was satisfied on or prior to that date. In connection with this settlement, we withheld 4.8 million shares at the applicable minimum statutory rates and remitted tax liabilities of $186.2 million on behalf of the RSUs holders to the relevant tax authorities in cash. The withheld shares became available for future issuance pursuant to the 2018 Plan.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Oct. 31, 2018
Accounting Policies [Abstract]
Consolidation	Our condensed consolidated financial statements include the accounts of DocuSign, Inc. and our wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.
Basis of Presentation	Our condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the applicable rules and regulations of the Securities and Exchange Commission (“SEC”). Therefore, these unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our prospectus dated April 26, 2018, as filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended (File No. 333-223990) (“Prospectus”). Our condensed consolidated financial statements are unaudited and have been prepared on a basis consistent with that used to prepare the audited annual consolidated financial statements and, in our opinion, include all adjustments of a normal recurring nature necessary for the fair statement of our financial position, results of operations and cash flows. Our condensed consolidated balance sheet as of January 31, 2018 was derived from audited financial statements but does not include all disclosures required by GAAP. The results of operations for the three and the nine months ended October 31, 2018 are not necessarily indicative of the results to be expected for the year ending January 31, 2019 .
Fiscal Year	Our fiscal year ends on January 31. References to fiscal 2019 , for example, are to the fiscal year ending January 31, 2019 .
Use of Estimates	The preparation of financial statements in conformity with 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. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include those related to the allocation of revenue between recognized and deferred amounts, allowance for bad debts, goodwill, intangible assets, deferred contract acquisition costs, customer benefit period, fair value of financial instruments, valuation of stock-based compensation, valuation of common stock, f air value of the liability and equity components of the convertible notes, valuation of the build-to-suit lease, and the valuation allowance for deferred income taxes.
Stock-Based Compensation	Compensation cost for all stock-based awards, including stock options and restricted stock units ("RSUs"), is measured at fair value on the date of grant and recognized over the service period. The fair value of stock options is estimated on the date of grant using a Black-Scholes model. The fair value of RSUs is estimated on the date of grant based on the fair value of our underlying common stock. We recognize compensation expense for stock options on a straight-line basis over the requisite service period. Compensation expense for RSUs granted prior to January 31, 2018, is amortized on a graded basis over the requisite service period as long as the performance condition in the form of a specified liquidity event is probable to occur. The liquidity event condition was satisfied upon the effectiveness of our registration statement on Form S-1 ("IPO Registration Statement") on April 26, 2018. On that date we recorded a cumulative stock-based compensation expense of $262.8 million using the accelerated attribution method for all the RSUs, for which the service condition has been fully satisfied as of April 26, 2018. The remaining unrecognized stock-based compensation expense related to the RSUs will be recorded over their remaining requisite service periods. During the nine months ended October 31, 2018 , we granted 0.6 million RSUs that are subject to performance-based vesting condition and a service-based condition. The performance-based conditions will be satisfied if our financial performance meets certain operating targets. We also granted 0.1 million RSUs that are subject to market-based vesting conditions and a service-based condition. The market-based conditions will be satisfied if certain milestones based on our common stock price are met. All other RSUs granted after January 31, 2018, vest on the satisfaction of service-based condition only. We recognize compensation expense for such RSUs on a straight-line basis over the requisite service period. Compensation expense is recognized net of forfeitures that are estimated at the time of grant and revised in subsequent periods if actual forfeitures differ from those estimates. We account for equity instruments issued to non-employees at fair value of the consideration received or fair value of the equity instrument issued, whichever is more reliably measurable. The measurement date of the fair value of the equity instrument issued is the earlier of the date on which the counterparty’s performance is complete or the date on which it is probable that performance will occur. Compensation expense related to stock-based awards issued to non-employees was $0.1 million and $0.4 million for the three months ended October 31, 2018 and 2017 and $0.9 million and $1.0 million for the nine months ended October 31, 2018 and 2017 . Determining the grant date fair value of options using the Black-Scholes option-pricing model requires management to make assumptions and judgments. These estimates involve inherent uncertainties and, if different assumptions had been used, stock-based compensation expense could have been materially different from the amounts recorded.
Recent Accounting Pronouncements	In February 2016, the Financial Accounting Standards Board ("FASB") issued accounting standards update ("ASU") No. 2016-02, Leases (Topic 842), which supersedes current guidance related to accounting for leases. This guidance is intended to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. In July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases. The ASU makes 16 technical corrections to the new leases standard and other accounting topics, alleviating unintended consequences from applying the new standard. It does not make any substantive changes to the core provisions or principles of the new standard. In July 2018, the FASB also issued ASU No. 2018-11, Leases (Topic 842). The ASU provides (1) an optional transition method that entities can use when adopting the standard and (2) a practical expedient that permits lessors to not separate nonlease components from the associated lease component if certain conditions are met. The standard is effective for public entities for annual and interim reporting periods beginning after December 15, 2018. Early adoption is permitted. The ASU can be adopted using modified retrospective approach as of the earliest period presented or as of the adoption date with the cumulative-effect adjustment to the opening balance recognized in retained earnings in the period of adoption. We are in the process of implementing changes to our processes and controls, in conjunction with our review of existing lease agreements, in order to adopt the new standard in the first quarter of fiscal 2020. We expect that the primary impact will relate to (1) the recognition of a right-of-use assets and lease liabilities on the balance sheet for substantially all our existing operating leases designated in Note 10 ; (2) the derecognition of existing assets and liabilities for sale-leaseback transactions arising from build-to-suit lease arrangements for which construction is complete and we are leasing the constructed asset that currently do not qualify for sale accounting, and (3) significant new disclosures about leasing activities. In February 2018, the FASB issued ASU No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220), which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act ("TCJA"). As the amendment only relates to the reclassification of the income tax effects of the TCJA, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. The standard is effective for annual and interim reporting periods beginning after December 15, 2018 for all entities. The amendment is to be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the TCJA is recognized. Early adoption is permitted. The adoption of the standard is not expected to have a material impact on our consolidated financial statements. In June 2018, the FASB issued ASU No. 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting. The ASU aligns the measurement and classification guidance for share-based payments to nonemployees with the guidance for share-based payments to employees, with certain exceptions. Under the guidance, the measurement of equity-classified nonemployee awards will be fixed at the grant date. The ASU is effective for public business entities in annual periods beginning after December 15, 2018, and interim periods within those years. Early adoption is permitted, including in an interim period, but not before an entity adopts the topic 606 revenue guidance. The adoption of the standard is not expected to have a material impact on our consolidated financial statements. In July 2018, the FASB issued ASU No. 2018-09, Codification Improvements, which clarifies, corrects errors in and makes improvements to several topics in the FASB Accounting Standard Codification. The transition and effective date guidance is based on the facts and circumstances of each amendment. Some of the amendments do not require transition guidance and were effective upon issuance of the ASU. Amendments that do have transition guidance are effective for public business entities for annual periods beginning after December 15, 2018. The adoption of the standard is not expected to have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), which modifies, removes and adds certain disclosure requirements on fair value measurements based on the FASB Concepts Statement, Conceptual Framework for Financial Reporting—Chapter 8: Notes to Financial Statements . The ASU is effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. Early adoption is permitted. We are in the process of evaluating the impact of the adoption of the ASU on our consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other— Internal-Use Software (Subtopic 350-40), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this ASU. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted. We are in the process of evaluating the impact of the adoption of the ASU on our consolidated financial statements.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Oct. 31, 2018
Fair Value Disclosures [Abstract]
Summary of assets and liabilities measured at fair value	The following table summarizes our assets and liabilities that are measured at fair value on a recurring basis, by level, within the fair value hierarchy: (in thousands) Level 1 Level 2 Level 3 Total October 31, 2018 Cash and cash equivalents Money market funds $ 998,068 $ — $ — $ 998,068 January 31, 2018 Cash and cash equivalents Money market funds $ 122,663 $ — $ — $ 122,663 Other liabilities—noncurrent Warrant liabilities — — 445 445

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	9 Months Ended
	Oct. 31, 2018
Property, Plant and Equipment [Abstract]
Property and equipment	Property and equipment consisted of the following: (in thousands) October 31, 2018 January 31, 2018 Computer and network equipment $ 53,801 $ 54,087 Software, including capitalized software development costs 26,479 24,270 Furniture and office equipment 9,805 9,692 Leasehold improvements 37,297 37,494 127,382 125,543 Less: Accumulated depreciation (64,458 ) (66,160 ) 62,924 59,383 Work in progress 11,041 3,636 $ 73,965 $ 63,019

Acquisition of SpringCM Inc. (T

Acquisition of SpringCM Inc. (Tables)	9 Months Ended
	Oct. 31, 2018
Business Combinations [Abstract]
Schedule of assets acquired and liabilities assumed	The following table summarizes the acquisition date fair values of assets acquired and liabilities assumed at the date of acquisition: (in thousands) September 4, 2018 Cash and cash equivalents $ 6,950 Other assets 10,542 Property and equipment 6,108 Goodwill 159,292 Intangible assets 73,000 Contract liabilities (9,973 ) Other liabilities (12,854 ) Deferred tax liability (7,336 ) $ 225,729
Schedule of identifiable intangible assets estimated useful lives	The estimated useful lives, primarily based on the expected period of benefit to us, and fair values of the identifiable intangible assets at acquisition date were as follows: (in thousands, except years) Estimated Fair Value Expected Useful Life Existing technology $ 11,900 3 years Customer relationships—subscription 54,200 9 years Backlog—subscription 6,400 2 years Tradenames / trademarks 500 1 year Total preliminary intangible assets $ 73,000
Schedule of unaudited pro forma results	The unaudited pro forma results have been prepared based on estimates and assumptions, which we believe are reasonable, however, they are not necessarily indicative of the consolidated results of operations had the acquisition occurred on February 1, 2017, or of future results of operations: Three Months Ended October 31, Nine Months Ended October 31, (in thousands, except per share data) 2018 2017 2018 2017 Revenue $ 181,490 $ 136,018 $ 517,507 $ 384,356 Net loss (57,433 ) (23,578 ) (384,917 ) (65,652 ) Net loss per share attributable to common stockholders, basic and diluted (0.34 ) (0.72 ) (3.10 ) (2.11 )

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets, Net (Tables)	9 Months Ended
	Oct. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying amount of goodwill	The changes in the carrying amount of goodwill for the nine months ended October 31, 2018 were as follows (in thousands): Balance at January 31, 2018 $ 37,306 Additions—SpringCM 159,292 Foreign currency translation (2,065 ) Balance at October 31, 2018 $ 194,533
Intangible assets	Intangible assets consisted of the following: As of October 31, 2018 As of January 31, 2018 (in thousands) Weighted-average Remaining Useful Life (Years) Estimated Fair Value Accumulated Amortization Acquisition-related Intangibles, Net Estimated Fair Value Accumulated Amortization Acquisition-related Intangibles, Net Existing technology 2.7 $ 31,594 $ (19,290 ) $ 12,304 $ 19,694 $ (15,953 ) $ 3,741 Tradenames / trademarks 1.1 2,419 (1,643 ) 776 1,919 (1,294 ) 625 Customer contracts & related relationships 8.5 65,782 (9,061 ) 56,721 11,582 (6,411 ) 5,171 Certifications 1.8 6,917 (4,500 ) 2,417 6,917 (3,462 ) 3,455 Maintenance contracts & related relationships 1.6 1,498 (1,029 ) 469 1,498 (804 ) 694 Backlog—Subscription 1.9 6,400 (491 ) 5,909 — — — 6.8 $ 114,610 $ (36,014 ) 78,596 $ 41,610 $ (27,924 ) 13,686 Cumulative translation adjustment 565 462 Total $ 79,161 $ 14,148
Amortization of finite-lived intangible assets	Amortization of finite-lived intangible assets for the three and nine months ended October 31, 2018 and 2017 was as follows: Three Months Ended October 31, Nine Months Ended October 31, (in thousands) 2018 2017 2018 2017 Cost of subscription revenue $ 1,632 $ 1,691 $ 4,303 $ 5,079 Sales and marketing 2,257 1,015 3,787 2,520 Total $ 3,889 $ 2,706 $ 8,090 $ 7,599
Future amortization of finite-lived intangibles	As of October 31, 2018 , future amortization of finite-lived intangibles that will be recorded in cost of revenue and operating expenses is estimated as follows, excluding cumulative translation adjustment (in thousands): Fiscal 2019, remainder $ 5,026 Fiscal 2020 17,712 Fiscal 2021 13,815 Fiscal 2022 8,369 Fiscal 2023 6,022 Thereafter 27,652 Total $ 78,596

Deferred Contract Acquisition_2

Deferred Contract Acquisition and Fulfillment Costs (Tables)	9 Months Ended
	Oct. 31, 2018
Revenue from Contract with Customer [Abstract]
Deferred contract costs	The following table represents a rollforward of our deferred contract acquisition costs: Nine Months Ended October 31, (in thousands) 2018 2017 Beginning balance $ 77,344 $ 57,271 Additions to deferred contract acquisition costs 51,038 29,931 Amortization of deferred contract acquisition costs (28,561 ) (20,714 ) Ending balance $ 99,821 $ 66,488 Deferred contract acquisition costs, current $ 2,730 $ 1,437 Deferred contract acquisitions costs, noncurrent 97,091 65,051 Total $ 99,821 $ 66,488 The following table represents our contract fulfillment costs, which include third-party service fees: Nine Months Ended October 31, (in thousands) 2018 2017 Beginning balance $ 3,316 $ 788 Additions to deferred contract fulfillment costs 1,507 2,291 Amortization of deferred contract fulfillment costs (1,328 ) (1,308 ) Ending balance $ 3,495 $ 1,771 Deferred contract fulfillment costs, current $ 1,042 $ 397 Deferred contract fulfillment costs, noncurrent 2,453 1,374 Total $ 3,495 $ 1,771

Convertible Senior Notes (Table

Convertible Senior Notes (Tables)	9 Months Ended
	Oct. 31, 2018
Debt Disclosure [Abstract]
Schedule of convertible debt	The net carrying value of the liability component of the Notes was as follows: (in thousands) October 31, 2018 Principal $ 575,000 Less: unamortized debt discount (131,756 ) Less: unamortized transaction costs (10,672 ) Net carrying amount $ 432,572 The net carrying amount of the equity component of the Notes was as follows: (in thousands) October 31, 2018 Proceeds allocated to the conversion option (debt discount) $ 134,667 Less: transaction costs (3,336 ) Net carrying amount $ 131,331 The interest expense recognized related to the Notes was as follows: (in thousands) Three and Nine Months Ended October 31, 2018 Contractual interest expense $ 347 Amortization of debt discount 2,911 Amortization of transaction costs 236 Total $ 3,494

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Oct. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of future minimum rental payments for operating leases	The future minimum annual lease payments as of October 31, 2018 , related to the lease agreements were as follows (in thousands): Fiscal 2019, remainder $ 4,699 Fiscal 2020 20,741 Fiscal 2021 20,267 Fiscal 2022 19,356 Fiscal 2023 19,797 Thereafter 45,221 Total minimum lease payments $ 130,081
Schedule of noncancelable contractual obligations	As of October 31, 2018 , our noncancelable contractual obligations with a remaining term of more than one year were as follows (in thousands): Fiscal 2019, remainder $ 932 Fiscal 2020 3,645 Fiscal 2021 2,229 Fiscal 2022 855 Fiscal 2023 898 Thereafter 5,499 Total $ 14,058

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Oct. 31, 2018
Equity [Abstract]
Stock option activity	Option activity for the nine months ended October 31, 2018 , was as follows: (in thousands, except per share data) Number of Options Outstanding Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Balances at January 31, 2018 19,832 $ 11.44 6.62 $ 152,754 Options exercised (1,869 ) 8.18 Options canceled/expired (334 ) 11.54 Balances at October 31, 2018 17,629 $ 11.78 6.01 $ 531,681 Vested and expected to vest at October 31, 2018 17,376 $ 11.70 5.98 $ 525,517 Exercisable at October 31, 2018 14,754 $ 10.70 5.70 $ 460,871
RSU activity	RSU activity for the nine months ended October 31, 2018 , was as follows: (in thousands, except per share data) Number of Units Weighted-Average Grant Date Fair Value Unvested at January 31, 2018 23,081 $ 17.54 Granted 8,576 54.77 Vested (11,376 ) 18.65 Canceled (1,028 ) 23.81 Unvested at October 31, 2018 19,253 $ 32.48

Net Loss per Share Attributab_2

Net Loss per Share Attributable to Common Stockholders (Tables)	9 Months Ended
	Oct. 31, 2018
Earnings Per Share [Abstract]
Calculation of basic and diluted loss per share	The following table presents the calculation of basic and diluted net loss per share attributable to common stockholders for periods presented: Three Months Ended October 31, Nine Months Ended October 31, (in thousands, except per share data) 2018 2017 2018 2017 Numerator: Net loss $ (52,813 ) $ (14,505 ) $ (360,214 ) $ (45,924 ) Less: preferred stock accretion — (376 ) (353 ) (1,097 ) Net loss attributable to common stockholders $ (52,813 ) $ (14,881 ) $ (360,567 ) $ (47,021 ) Denominator: Weighted-average common shares outstanding 167,736 33,353 124,343 31,604 Net loss per share attributable to common stockholders: Basic and diluted $ (0.31 ) $ (0.45 ) $ (2.90 ) $ (1.49 )
Antidilutive securities	Outstanding potentially dilutive securities that were excluded from the diluted per share calculations because they would have been antidilutive are as follows: As of October 31, (in thousands) 2018 2017 Convertible preferred stock as-converted — 100,350 Stock options 17,629 21,840 Warrants to purchase convertible preferred stock — 22 Warrants to purchase common stock — 18 RSUs 18,598 — Total antidilutive securities 36,227 122,230

Geographic Information (Tables)

Geographic Information (Tables)	9 Months Ended
	Oct. 31, 2018
Segment Reporting [Abstract]
Revenues by geographic area	Revenue by geographic area were as follows: Three Months Ended October 31, Nine Months Ended October 31, (in thousands) 2018 2017 2018 2017 United States $ 147,677 $ 106,577 $ 416,034 $ 307,164 International 30,708 24,012 85,203 62,466 Total revenue $ 178,385 $ 130,589 $ 501,237 $ 369,630
Property and equipment by geographic area	Our property and equipment by geographic area were as follows: (in thousands) October 31, 2018 January 31, 2018 United States $ 58,976 $ 51,023 International 14,989 11,996 Total property and equipment $ 73,965 $ 63,019

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 18, 2018	May 01, 2018	Apr. 26, 2018	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Jan. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from issuance initial public offering		$ 524,200				$ 529,305	$ 0
Underwriting discounts and commissions		30,800
Other offering expenses		$ 5,100
Redeemable convertible preferred stock, shares issued (in shares)		100,200,000		0		0		100,226,000
Reclassification of outstanding warrant liability into additional paid-in capital upon issuance of new warrants						$ 848
Common stock, shares authorized (in shares)		500,000,000		500,000,000		500,000,000		185,000,000
Preferred stock, shares authorized (in shares)		10,000,000		10,000,000		10,000,000		0
Stock issuance costs						$ 3,692	0
Stock-based compensation expense for non-employees				$ 100	$ 400	$ 900	$ 1,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated share based compensation expense			$ 262,800
Shares granted (in shares)						8,576,493
RSUs with vesting conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)						600,000
RSU's with market-based and service-based vesting conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)						100,000
IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued and sold, IPO (in shares)		19,300,000
Price per share, IPO (in usd per share)		$ 29
Over-Allotment Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued and sold, IPO (in shares)		3,300,000
IPO - Shares From Existing Shareholders
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued and sold, IPO (in shares)		5,600,000
Follow-On Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued and sold, IPO (in shares)	8,100,000
Price per share, IPO (in usd per share)	$ 55
Stock issuance costs	$ 1,300
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued upon conversion (in shares)		100,400,000				100,350,008
Warrants to purchase common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued upon conversion (in shares)		22,468
Reclassification of outstanding warrant liability into additional paid-in capital upon issuance of new warrants		$ 800

Revenue and Performance Oblig_2

Revenue and Performance Obligations - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Disaggregation of Revenue [Line Items]
Remaining performance obligations	$ 493.4		$ 493.4
Subscription | Minimum
Disaggregation of Revenue [Line Items]
Contract term			1 year
Subscription | Maximum
Disaggregation of Revenue [Line Items]
Contract term			3 years
Product concentration risk | Revenue | Subscription
Disaggregation of Revenue [Line Items]
Concentration risk percentage	95.00%	94.00%	95.00%	94.00%

Revenue and Performance Oblig_3

Revenue and Performance Obligations - Remaining Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-31	Oct. 31, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	52.00%
Remaining performance obligations, period of recognition	1 year

Fair Value Measurements - Asset

Fair Value Measurements - Assets and liabilities measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 998,068	$ 122,663
Other liabilities—noncurrent		445
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	998,068	122,663
Other liabilities—noncurrent		0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Other liabilities—noncurrent		0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 0	0
Other liabilities—noncurrent		$ 445

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($)	Oct. 31, 2018	Sep. 30, 2018	May 01, 2018	Jan. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities—noncurrent				$ 445,000
Series B-1 preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Warrants outstanding (in shares)	22,468
Class A common stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Warrants outstanding (in shares)			22,468
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities—noncurrent				$ 0
Fair value of the Notes	$ 540,500,000
Convertible Debt | Convertible Senior Notes Due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt interest rate percentage	0.50%
Aggregate principal amount of debt issued		$ 575,000,000

Property and Equipment, Net (De

Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Jan. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, net	$ 73,965		$ 73,965		$ 63,019
Depreciation expense	6,500	$ 5,600	17,900	$ 16,100
Financing liability	2,500		2,500
Computer and network equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	53,801		53,801		54,087
Software, including capitalized software development costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	26,479		26,479		24,270
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,805		9,805		9,692
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	37,297		37,297		37,494
Property and equipment, excluding work in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	127,382		127,382		125,543
Less: Accumulated depreciation	(64,458)		(64,458)		(66,160)
Property and equipment, net	62,924		62,924		59,383
Work in progress
Property, Plant and Equipment [Line Items]
Property and equipment, net	11,041		11,041		$ 3,636
Israel Leased Property
Property, Plant and Equipment [Line Items]
Property and equipment, net	3,800		3,800
Israel Leased Property | Work in progress
Property, Plant and Equipment [Line Items]
Property and equipment, net	1,300		1,300
Israel Leased Property | Other Capitalized Property Plant and Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, net	$ 2,500		$ 2,500

Acquisition of SpringCM Inc. -

Acquisition of SpringCM Inc. - Narrative (Details) - USD ($) $ in Thousands, shares in Millions	Sep. 04, 2018	Oct. 31, 2018	Oct. 31, 2018	Oct. 31, 2017
Business Acquisition [Line Items]
Cash paid, excluding cash acquired			$ 218,779	$ 0
SpringCM Inc.
Business Acquisition [Line Items]
Cash paid, excluding cash acquired	$ 218,800
Portion of cash paid held in escrow	$ 8,200
Period of time held in escrow	18 months
Acquisition costs			1,800
Revenue since acquisition date		$ 3,800	$ 3,800
RSUs with vesting conditions | SpringCM Inc.
Business Acquisition [Line Items]
Shares granted to employees (in shares)			0.5

Acquisition of SpringCM Inc. _2

Acquisition of SpringCM Inc. - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Oct. 31, 2018	Sep. 04, 2018	Jan. 31, 2018
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	$ 194,533		$ 37,306
SpringCM Inc.
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Cash and cash equivalents		$ 6,950
Other assets		10,542
Property and equipment		6,108
Goodwill		159,292
Intangible assets		73,000
Contract liabilities		(9,973)
Other liabilities		(12,854)
Deferred tax liability		(7,336)
Total assets acquired and liabilities assumed		$ 225,729

Acquisition of SpringCM Inc. _3

Acquisition of SpringCM Inc. - Intangible Assets Acquired (Details) - SpringCM Inc. $ in Thousands	Sep. 04, 2018USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 73,000
Existing technology
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 11,900
Expected Useful Life	3 years
Customer relationships—subscription
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 54,200
Expected Useful Life	9 years
Backlog—subscription
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 6,400
Expected Useful Life	2 years
Tradenames / trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 500
Expected Useful Life	1 year

Acquisition of SpringCM Inc. _4

Acquisition of SpringCM Inc. - Pro Forma Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Business Acquisition, Pro Forma Information [Abstract]
Revenue	$ 181,490	$ 136,018	$ 517,507	$ 384,356
Net loss	$ (57,433)	$ (23,578)	$ (384,917)	$ (65,652)
Net loss per share attributable to common stockholders, basic and diluted (in usd per share)	$ (0.34)	$ (0.72)	$ (3.10)	$ (2.11)

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets, Net - Goodwill (Details) $ in Thousands	9 Months Ended
	Oct. 31, 2018USD ($)
Goodwill [Roll Forward]
Balance at January 31, 2018	$ 37,306
Additions—SpringCM	159,292
Foreign currency translation	(2,065)
Balance at October 31, 2018	$ 194,533

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets, Net - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2018	Jan. 31, 2018
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	6 years 9 months 18 days
Estimated Fair Value	$ 114,610	$ 41,610
Accumulated Amortization	(36,014)	(27,924)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	78,596	13,686
Cumulative translation adjustment	565	462
Acquisition-related Intangibles, Net	$ 79,161	14,148
Existing technology
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	2 years 8 months 12 days
Estimated Fair Value	$ 31,594	19,694
Accumulated Amortization	(19,290)	(15,953)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 12,304	3,741
Tradenames / trademarks
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	1 year 1 month 6 days
Estimated Fair Value	$ 2,419	1,919
Accumulated Amortization	(1,643)	(1,294)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 776	625
Customer contracts & related relationships
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	8 years 6 months
Estimated Fair Value	$ 65,782	11,582
Accumulated Amortization	(9,061)	(6,411)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 56,721	5,171
Certifications
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	1 year 9 months 18 days
Estimated Fair Value	$ 6,917	6,917
Accumulated Amortization	(4,500)	(3,462)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 2,417	3,455
Maintenance contracts & related relationships
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	1 year 7 months 6 days
Estimated Fair Value	$ 1,498	1,498
Accumulated Amortization	(1,029)	(804)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 469	694
Backlog—Subscription
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	1 year 10 months 24 days
Estimated Fair Value	$ 6,400	0
Accumulated Amortization	(491)	0
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 5,909	$ 0

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets, Net - Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of finite-lived intangible assets	$ 3,889	$ 2,706	$ 8,090	$ 7,599
Cost of subscription revenue
Finite-Lived Intangible Assets [Line Items]
Amortization of finite-lived intangible assets	1,632	1,691	4,303	5,079
Sales and marketing
Finite-Lived Intangible Assets [Line Items]
Amortization of finite-lived intangible assets	$ 2,257	$ 1,015	$ 3,787	$ 2,520

Goodwill and Intangible Asset_6

Goodwill and Intangible Assets, Net - Future Amortization (Details) - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Fiscal 2019, remainder	$ 5,026
Fiscal 2,020	17,712
Fiscal 2,021	13,815
Fiscal 2,022	8,369
Fiscal 2,023	6,022
Thereafter	27,652
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 78,596	$ 13,686

Contract Balances (Details)

Contract Balances (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Sep. 04, 2018	Jan. 31, 2018
Business Acquisition [Line Items]
Contract assets	$ 13,400			$ 16,100
Contract assets, noncurrent	1,300			$ 1,900
Revenue recognized that was included in contract liability balance at the beginning of the period	$ 238,100	$ 164,800
Payment term	30 days
SpringCM Inc.
Business Acquisition [Line Items]
Contract liabilities acquired			$ (9,973)

Deferred Contract Acquisition_3

Deferred Contract Acquisition and Fulfillment Costs (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Jan. 31, 2018	Oct. 31, 2017
Capitalized Contract Cost, Net [Roll Forward]
Amortization of deferred contract acquisition costs	$ (29,889)	$ (22,022)
Deferred contract acquisitions costs, noncurrent			$ 97,091	$ 75,535
Contract acquisition costs
Capitalized Contract Cost, Net [Roll Forward]
Beginning balance	77,344	57,271
Additions to deferred contract acquisition costs	51,038	29,931
Amortization of deferred contract acquisition costs	(28,561)	(20,714)
Ending balance	99,821	66,488
Deferred contract acquisition costs, current			2,730		$ 1,437
Deferred contract acquisitions costs, noncurrent			97,091		65,051
Total	77,344	57,271	99,821	77,344	66,488
Contract fulfillment costs
Capitalized Contract Cost, Net [Roll Forward]
Beginning balance	3,316	788
Additions to deferred contract acquisition costs	1,507	2,291
Amortization of deferred contract acquisition costs	(1,328)	(1,308)
Ending balance	3,495	1,771
Deferred contract acquisition costs, current			1,042		397
Deferred contract acquisitions costs, noncurrent			2,453		1,374
Total	$ 3,316	$ 788	$ 3,495	$ 3,316	$ 1,771

Convertible Senior Notes - Narr

Convertible Senior Notes - Narrative (Details) $ / shares in Units, shares in Millions	1 Months Ended	9 Months Ended
	Sep. 30, 2018USD ($)day$ / sharesshares	Oct. 31, 2018USD ($)	Oct. 31, 2017USD ($)
Debt Conversion [Line Items]
Proceeds from issuance of debt		$ 560,756,000	$ 0
Costs incurred for capped calls		$ 67,563,000
Convertible Senior Notes Due 2023 | Convertible Debt
Debt Conversion [Line Items]
Aggregate principal amount of debt issued	$ 575,000,000
Debt interest rate percentage		0.50%
Additional principal amount purchased	75,000,000
Proceeds from issuance of debt	$ 560,800,000
Conversion price (in usd per share) | $ / shares	$ 71.50
Conversion rate	0.013986
Percentage of principal amount redeemed	100.00%
Trading days | day	20
Consecutive trading days | day	30
Percentage of conversion price	130.00%
Equity component of conversion option		$ 134,667,000
Transaction costs attributable to liability component		10,900,000
Transaction costs attributable to equity components		$ 3,336,000
Capped Calls
Debt Conversion [Line Items]
Conversion price (in usd per share) | $ / shares	$ 71.50
Initial cap price (in usd per share) | $ / shares	$ 110
Shares covered by capped calls (in shares) | shares	8
Costs incurred for capped calls	$ 67,600,000
Conversion Covenant One | Convertible Senior Notes Due 2023 | Convertible Debt
Debt Conversion [Line Items]
Trading days | day	20
Consecutive trading days | day	30
Percentage of conversion price	130.00%
Conversion Covenant Two | Convertible Senior Notes Due 2023 | Convertible Debt
Debt Conversion [Line Items]
Trading days | day	5
Consecutive trading days | day	10
Percentage of conversion price	98.00%
Measurement Input, Discount Rate [Member] | Convertible Senior Notes Due 2023 | Convertible Debt
Debt Conversion [Line Items]
Discount rate		0.06

Convertible Senior Notes - Carr

Convertible Senior Notes - Carrying Value of Liability Component (Details) - Convertible Senior Notes Due 2023 - Convertible Debt $ in Thousands	Oct. 31, 2018USD ($)
Debt Instrument [Line Items]
Principal	$ 575,000
Less: unamortized debt discount	(131,756)
Less: unamortized transaction costs	(10,672)
Net carrying amount	$ 432,572

Convertible Senior Notes - Ca_2

Convertible Senior Notes - Carrying Amount Of Equity Component (Details) - Convertible Debt - Convertible Senior Notes Due 2023 $ in Thousands	Oct. 31, 2018USD ($)
Debt Instrument [Line Items]
Proceeds allocated to the conversion option (debt discount)	$ 134,667
Less: transaction costs	(3,336)
Net carrying amount	$ 131,331

Convertible Senior Notes - Inte

Convertible Senior Notes - Interest Expense (Details) - Convertible Debt - Convertible Senior Notes Due 2023 - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 31, 2018	Oct. 31, 2018
Debt Instrument [Line Items]
Contractual interest expense	$ 347	$ 347
Amortization of debt discount	2,911	2,911
Amortization of transaction costs	236	236
Total	$ 3,494	$ 3,494

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Jan. 31, 2018
Property, Plant and Equipment [Line Items]
Rent expense		$ 5,300	$ 4,500	$ 14,400	$ 13,300
Letters of credit outstanding		9,100		9,100
Lease term	10 years
Threshold term for lease cancellation	5 years 6 months
Optional extension period	5 years
Total property and equipment		73,965		73,965		$ 63,019
Israel Leased Property
Property, Plant and Equipment [Line Items]
Total property and equipment		3,800		3,800
Israel Leased Property | Other Capitalized Property Plant and Equipment
Property, Plant and Equipment [Line Items]
Total property and equipment		$ 2,500		$ 2,500

Commitments and Contingencies_2

Commitments and Contingencies - Future Minimum Annual Lease Payments (Details) $ in Thousands	Oct. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Fiscal 2019, remainder	$ 4,699
Fiscal 2,020	20,741
Fiscal 2,021	20,267
Fiscal 2,022	19,356
Fiscal 2,023	19,797
Thereafter	45,221
Total minimum lease payments	$ 130,081

Commitments and Contingencies_3

Commitments and Contingencies - Future Purchase Obligations (Details) $ in Thousands	Oct. 31, 2018USD ($)
Purchase Obligation, Fiscal Year Maturity [Abstract]
Fiscal 2019, remainder	$ 932
Fiscal 2,020	3,645
Fiscal 2,021	2,229
Fiscal 2,022	855
Fiscal 2,023	898
Thereafter	5,499
Total	$ 14,058

Stockholders' Equity - Narrativ

Stockholders' Equity - Narrative (Details) $ in Thousands	Apr. 26, 2018USD ($)	Oct. 31, 2018USD ($)planshares	Oct. 31, 2018USD ($)planshares	Oct. 31, 2017USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock-based compensation plans | plan		3	3
Unrecognized compensation cost, options		$ 18,500	$ 18,500
Employee stock purchase plan, compensation expense			$ 361,707	$ 23,513
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, remaining weighted-average period for recognition			1 year 7 months 6 days
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, remaining weighted-average period for recognition			2 years 1 month 6 days
Service period			4 years
Accelerated share based compensation expense	$ 262,800
Shares granted (in shares) | shares			8,576,493
Unrecognized compensation cost, RSUs		422,500	$ 422,500
RSUs with vesting conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares) | shares			700,000
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan, compensation expense		$ 1,000	$ 1,000
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for future issuance (in shares) | shares		12,200,000	12,200,000
Annual increase in shares reserved, percentage of total shares			5.00%
2018 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for future issuance (in shares) | shares		3,800,000	3,800,000
Annual increase in shares reserved, percentage of total shares			1.00%
Employee contribution, maximum percentage of earnings		15.00%	15.00%
Employee stock purchase plan offering period			6 months

Stockholders' Equity - Stock Op

Stockholders' Equity - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2018	Jan. 31, 2018
Number of Options Outstanding
Beginning balance (in shares)	19,831,715
Options exercised (in shares)	(1,868,821)
Options canceled/expired (in shares)	(334,043)
Ending balance (in shares)	17,629,000	19,831,715
Vested and expected to vest (in shares)	17,376,086
Exercisable (in shares)	14,754,274
Weighted-Average Exercise Price Per Share
Beginning balance (in usd per share)	$ 11.44
Options exercised (in usd per share)	8.18
Options canceled/expired (in usd per share)	11.54
Ending balance (in usd per share)	11.78	$ 11.44
Vested and expected to vest (in usd per share)	11.70
Exercisable (in usd per share)	$ 10.70
Weighted-Average Remaining Contractual Term
Balance	6 years 4 days	6 years 7 months 13 days
Vested and expected to vest	5 years 11 months 23 days
Exercisable	5 years 8 months 12 days
Aggregate Intrinsic Value
Balance	$ 531,681	$ 152,754
Vested and expected to vest	525,517
Exercisable	$ 460,871

Stockholders' Equity - RSU Acti

Stockholders' Equity - RSU Activity (Details) - RSUs	9 Months Ended
	Oct. 31, 2018$ / sharesshares
Number of Units
Unvested at beginning of period (in shares) | shares	23,080,543
Granted (in shares) | shares	8,576,493
Vested (in shares) | shares	(11,375,732)
Canceled (in shares) | shares	(1,027,674)
Unvested at end of period (in shares) | shares	19,252,630
Weighted-Average Grant Date Fair Value
Unvested at beginning of period (in usd per share) | $ / shares	$ 17.54
Granted (in usd per share) | $ / shares	54.77
Vested (in usd per share) | $ / shares	18.65
Canceled (in usd per share) | $ / shares	23.81
Unvested at end of period (in usd per share) | $ / shares	$ 32.48

Net Loss per Share Attributab_3

Net Loss per Share Attributable to Common Stockholders - Calculation of basic and diluted net loss per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Numerator:
Net loss	$ (52,813)	$ (14,505)	$ (360,214)	$ (45,924)
Less: preferred stock accretion	0	(376)	(353)	(1,097)
Net loss attributable to common stockholders	$ (52,813)	$ (14,881)	$ (360,567)	$ (47,021)
Denominator:
Weighted-average common shares outstanding (in shares)	167,736	33,353	124,343	31,604
Net loss per share attributable to common stockholders:
Basic and diluted (in usd per share)	$ (0.31)	$ (0.45)	$ (2.90)	$ (1.49)

Net Loss per Share Attributab_4

Net Loss per Share Attributable to Common Stockholders - Antidilutive Securities (Details) - shares shares in Thousands	9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	36,227	122,230
Convertible preferred stock as-converted
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	0	100,350
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	17,629	21,840
Warrants to purchase convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	0	22
Warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	0	18
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	18,598	0

Net Loss per Share Attributab_5

Net Loss per Share Attributable to Common Stockholders - Narrative (Details) - shares	Oct. 31, 2018	Oct. 31, 2017
RSUs with vesting conditions
IPO, Sale of Stock [Line Items]
RSUs outstanding (in shares)	654,439	22,162,316

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Operating Loss Carryforwards [Line Items]
Provision for (benefit from) income taxes	$ (5,712)	$ 783	$ (3,059)	$ 761
Reduction in income tax expense	7,400
Uncertain tax benefits	8,100		$ 8,100
SpringCM Inc.
Operating Loss Carryforwards [Line Items]
Deferred tax liabilities	$ 33,000

Geographic Information (Details

Geographic Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018USD ($)	Oct. 31, 2017USD ($)	Oct. 31, 2018USD ($)segment	Oct. 31, 2017USD ($)	Jan. 31, 2018USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segments | segment			1
Number of reportable segments | segment			1
Total revenue	$ 178,385	$ 130,589	$ 501,237	$ 369,630
Total property and equipment	73,965		73,965		$ 63,019
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	147,677	106,577	416,034	307,164
Total property and equipment	58,976		58,976		51,023
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	30,708	$ 24,012	85,203	$ 62,466
Total property and equipment	$ 14,989		$ 14,989		$ 11,996

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event shares in Millions, $ in Millions	Nov. 15, 2018USD ($)shares
Subsequent Event [Line Items]
Remitted tax liabilities | $	$ 186.2
RSUs
Subsequent Event [Line Items]
Shares settled upon service condition satisfaction (in shares)	12.3
Shares withheld (in shares)	4.8