Zuora (ZUO) 10-Q 12 Sep 18 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jul. 31, 2018	Aug. 31, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jul. 31, 2018
Document Fiscal Year Focus	2,019
Document Fiscal Period Focus	Q2
Trading Symbol	ZUO
Entity Registrant Name	ZUORA INC
Entity Central Index Key	1,423,774
Current Fiscal Year End Date	--01-31
Entity Filer Category	Non-accelerated Filer
Class A common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		61,124,245
Class B common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		46,594,634

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Current assets:
Cash and cash equivalents	$ 179,195	$ 48,208
Accounts receivable, net of allowance for doubtful accounts of $3,018 and $3,292 as of July 31, 2018 and January 31, 2018, respectively	42,054	49,764
Restricted cash, current portion	1,770	0
Prepaid expenses and other current assets	8,793	9,302
Total current assets	231,812	107,274
Property and equipment, net	16,924	10,204
Restricted cash, net of current portion	4,884	5,155
Purchased intangibles, net	10,048	11,292
Goodwill	20,861	20,614
Other assets	2,708	827
Total assets	287,237	155,366
Current liabilities:
Accounts payable	2,841	2,572
Accrued expenses and other current liabilities	14,677	24,496
Accrued employee liabilities	20,976	17,701
Lease obligation, current portion	1,648	1,066
Debt, current portion	5,000	2,917
Deferred revenue, current portion	69,094	66,058
Total current liabilities	114,236	114,810
Debt, net of current portion	9,616	12,052
Deferred revenue, net of current portion	741	346
Lease obligation, net of current portion	1,541	324
Other long-term liabilities	1,856	1,168
Total liabilities	127,990	128,700
Commitments and contingencies
Stockholders’ equity:
Convertible preferred stock	0	6
Additional paid-in capital	461,804	286,152
Related party receivable	(5,657)	(1,281)
Accumulated comprehensive loss	809	471
Accumulated deficit	(297,719)	(258,685)
Total stockholders’ equity	159,247	26,666
Total liabilities and stockholders’ equity	287,237	155,366
Class A common stock
Stockholders’ equity:
Common stock	4	0
Class B common stock
Stockholders’ equity:
Common stock	$ 6	$ 3

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 3,018	$ 3,292

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Revenue:
Subscription	$ 41,470	$ 28,797	$ 77,584	$ 54,852
Professional services	16,284	10,615	31,914	16,899
Total revenue	57,754	39,412	109,498	71,751
Cost of revenue:
Subscription	10,421	8,071	20,286	14,106
Professional services	18,226	12,552	34,379	19,326
Total cost of revenue	28,647	20,623	54,665	33,432
Gross profit	29,107	18,789	54,833	38,319
Operating expenses:
Research and development	13,323	9,768	25,385	17,645
Sales and marketing	25,429	18,479	48,266	33,431
General and administrative	8,563	5,551	17,974	10,230
Total operating expenses	47,315	33,798	91,625	61,306
Loss from operations	(18,208)	(15,009)	(36,792)	(22,987)
Interest and other (expense) income, net	(1,178)	407	(1,851)	391
Loss before income taxes	(19,386)	(14,602)	(38,643)	(22,596)
Income tax provision	(201)	(239)	(391)	(371)
Net loss	(19,587)	(14,841)	(39,034)	(22,967)
Comprehensive loss:
Foreign currency translation adjustment	418	154	340	320
Comprehensive loss	$ (19,169)	$ (14,687)	$ (38,694)	$ (22,647)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.19)	$ (0.56)	$ (0.52)	$ (0.90)
Weighted-average shares outstanding used in calculating net loss per share attributable to common stockholders, basic and diluted	105,146	26,417	75,529	25,654

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Cash flows from operating activities:
Net loss	$ (39,034)	$ (22,967)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,495	3,188
Stock-based compensation	10,263	2,954
Loss on disposal of assets	144	0
Provision for doubtful accounts	2,512	345
Changes in operating assets and liabilities:
Accounts receivable	5,198	1,421
Prepaid expenses and other current assets	(1,905)	(267)
Other assets	(1,881)	(76)
Accounts payable	159	(3,106)
Accrued expenses and other current liabilities	2,626	1,873
Accrued employee liabilities	3,275	1,643
Deferred revenue	3,431	2,042
Other long-term liabilities	495	(68)
Net cash used in operating activities	(10,222)	(13,018)
Cash flows from investing activities:
Purchases of property and equipment	(6,690)	(1,658)
Business combinations, net of cash acquired	(247)	(11,420)
Net cash used in investing activities	(6,937)	(13,078)
Cash flows from financing activities:
Payments under capital leases	(464)	(903)
Proceeds from issuance of common stock upon exercise of stock options	6,665	2,184
Payments of offering costs	(4,272)	0
Proceeds from initial public offering costs, net of underwriters’ discounts and commissions	164,703	0
Payments under related party notes receivable	(4,344)	0
Repurchases of unvested common stock	(6)	0
Principal payments on long-term debt	(417)	0
Payments related to business combination	(12,558)	0
Proceeds from long-term debt, net of issuance costs	0	14,949
Net cash provided by financing activities	149,307	16,230
Effect of exchange rates on cash and cash equivalents and restricted cash	338	321
Net increase (decrease) in cash and cash equivalents and restricted cash	132,486	(9,545)
Cash and cash equivalents and restricted cash, beginning of period	53,363	77,882
Cash and cash equivalents and restricted cash, end of period	185,849	68,337
Supplemental disclosure of non-cash investing and financing activities:
Property and equipment acquired under capital leases	2,335	488
Lapse in restrictions on early exercised common stock options	739	289
Property and equipment purchases accrued or in accounts payable	1,069	66
Deferred offering costs payable or accrued but not paid	337	0
Accrued acquisition-related payments	0	12,558
Reconciliation of cash and cash equivalents and restricted cash within the condensed consolidated balance sheets to the amounts shown in the condensed consolidated statements of cash flows above:
Cash and cash equivalents	179,195	63,176
Restricted cash, current	1,770	6
Restricted cash, net of current portion	$ 4,884	$ 5,155

Overview and Basis of Presentat

Overview and Basis of Presentation	6 Months Ended
	Jul. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Overview and Basis of Presentation	Overview and Basis of Presentation Description of Business Zuora, Inc. was incorporated in the state of Delaware in 2006 and began operations in 2007. Zuora’s fiscal year ends on January 31. Zuora is headquartered in San Mateo, California. The Company provides cloud-based software on a subscription basis that enables any company in any industry to successfully launch, manage, and transform into a subscription business. Architected specifically for dynamic, recurring subscription business models, Zuora functions as an intelligent hub that automates and orchestrates the entire subscription order-to-cash process. The Company’s cloud-based software solution is the new system of record for subscription businesses. References to Zuora, “Company”, “our”, or “we” in these notes refer to Zuora, Inc. and its subsidiaries on a consolidated basis. Initial Public Offering In April 2018, the Company completed an initial public offering (IPO), in which the Company issued and sold an aggregate of 12.7 million shares of its newly authorized Class A common stock at a price to the public of $14.00 per share. The shares sold included 1.7 million shares pursuant to the exercise by the underwriters of an option to purchase additional shares at a price of $14.00 per share less underwriting discounts and commissions. The Company received aggregate net proceeds of $162.2 million from the IPO after deducting underwriting discounts and commissions and payments of offering costs as of April 30, 2018. Prior to the completion of the IPO, all shares of common stock then outstanding were reclassified as Class B common stock, and all shares of convertible preferred stock outstanding immediately prior to the IPO were converted into 62.0 million shares of Class B common stock on a one-to-one basis. As of July 31, 2018 , 45.0 million shares of the Company’s Class A common stock and 62.7 million shares of Class B common stock were outstanding. Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated financial statements, which include the accounts of the Company and its wholly owned subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. All intercompany balances and transactions have been eliminated in consolidation. The unaudited condensed consolidated balance sheet as of January 31, 2018 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by U.S. GAAP on an annual reporting basis. The unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the balance sheet, statements of comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year ending January 31, 2019 or any future period. The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s final prospectus dated April 11, 2018 (Prospectus) filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended. Use of Estimates The preparation of consolidated financial statements in conformity with generally accepted accounting principles requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities at the date of the consolidated financial statements, as well as reported amounts of revenue and expenses during the reporting period. Actual results could differ materially from those estimates. The Company’s most significant estimates and assumptions are related to revenue recognition with respect to the determination of the relative selling prices for the Company’s services; determination of the fair value of the Company’s common stock for valuation of the Company’s stock-based awards issued prior to the completion of the IPO; valuation of the Company’s stock-based awards; estimates of allowance for doubtful accounts; estimates of the fair value of goodwill, intangible assets and other long-lived assets; and the valuation of deferred income tax assets and contingencies. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results may differ materially from these estimates under different assumptions or conditions.

Summary of Significant Accounti

Summary of Significant Accounting Policies and Recent Accounting Pronouncements	6 Months Ended
	Jul. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies and Recent Accounting Pronouncements	Summary of Significant Accounting Policies and Recent Accounting Pronouncements The Company’s significant accounting policies are discussed in “Index to Consolidated Financial Statements—Note 1. Summary of Business and Significant Accounting Policies” in the Prospectus. There have been no significant changes to these policies during the six months ended July 31, 2018 , except as noted below. Stock-Based Compensation All stock-based compensation to employees, including the purchase rights issued under the Company’s 2018 Employee Stock Purchase Plan (ESPP), is based on the fair value of the awards on the date of grant. This fair value is recognized as an expense following the straight-line attribution method over the requisite service period of the entire award for stock options, restricted stock units (RSUs) and restricted stock; and over the offering period for the purchase rights issued under the ESPP. The Company uses the Black-Scholes option pricing model to measure the fair value of its stock options and the purchase rights issued under the ESPP. The fair value of the RSUs and restricted stock is determined using the fair value of the Company’s Class A common stock on the date of grant. Prior to the IPO, the fair value of the Company’s common stock was determined by the estimated fair value of the Company’s common stock at the time of grant. After the IPO, the Company uses the closing price of its Class A common stock on the date of grant for the fair value. Stock-based compensation expense is recorded net of estimated forfeitures in the Company’s unaudited condensed consolidated statements of comprehensive loss. Recent Accounting Pronouncements—Not Yet Adopted The Jumpstart Our Business Startups Act (JOBS Act) allows the Company, as an “emerging growth company,” to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. The Company has elected to use this extended transition period under the JOBS Act. The adoption dates discussed below reflect this election. In May 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (ASU 2014-09) and has modified the standard thereafter. These standards replace existing revenue recognition rules with a comprehensive revenue measurement and recognition standard and expanded disclosure requirements. ASU 2014-09, as amended, became effective for public companies for the fiscal year beginning after December 15, 2017 and interim periods within that year. Private companies have an additional year to adopt the standard. The two permitted transition methods under the new standard are the full retrospective method, under which ASU 2014-09 would be applied to each prior reporting period presented and the cumulative effect of applying the standard would be recognized at the earliest period shown, or the modified retrospective method, under which the cumulative effect of applying ASU 2014-09 would be recognized at the date of initial application. The Company plans to adopt the new revenue standard when it becomes effective for the Company for the fiscal year ending January 31, 2020 (i.e., effective February 1, 2019). The Company is currently in the process of determining what method of adoption it plans to use. The Company is currently assessing the effect the guidance will have on its condensed consolidated financial statements. The adoption also affects the deferral of incremental commission costs of obtaining subscription contracts, which previously were expensed as incurred. Under the new standard, the Company will defer all incremental commission costs to obtain the contract and amortize them over the expected period of benefit. The Company is currently assessing the expected period of benefit. In addition, the new standard will expand the disclosures to be made in the Company’s consolidated financial statements, including disaggregation of revenue, information on contract balances, deferred contract acquisition costs, performance obligations, and remaining performance obligations. In January 2016, the FASB issued ASU No. 2016-01 (Subtopic 825-10), Financial Instruments—Overall: Recognition and Measurement of Financial Assets and Financial Liabilities (ASU 2016-01), which primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the FASB clarified guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. The accounting for other financial instruments, such as loans, investments in debt securities, and financial liabilities is largely unchanged. ASU 2016-01 is effective for fiscal years beginning after December 15, 2018, and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company has not yet adopted ASU 2016-01 and is currently evaluating the impact of adoption on its condensed consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02 (Topic 842)— Leases (ASU 2016-02), which supersedes the guidance in topic ASC 840, Leases. The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases today. ASU 2016-02 is effective for fiscal years beginning after December 15, 2019 and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted. The Company has not yet adopted ASU 2016-02 and is currently evaluating the impact of the adoption of this standard on its condensed consolidated financial statements. In February 2018, the FASB issued ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (ASU 2018-02). Under existing U.S. GAAP, the effects of changes in tax rates and laws on deferred tax balances are recorded as a component of income tax expense in the period in which the law was enacted. When deferred tax balances related to items originally recorded in accumulated other comprehensive income (loss) are adjusted, certain tax effects become stranded in accumulated other comprehensive income. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income (loss) to retained earnings (accumulated deficit) for stranded income tax effects resulting from the Tax Cuts and Jobs Act (the Tax Act). The amendments in this ASU also require certain disclosures about stranded income tax effects. The guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption in any period is permitted. The Company’s provisional adjustments recorded in the fiscal year ended January 31, 2018 to account for the impact of the Tax Act did not result in stranded tax effects. The Company has not yet adopted ASU 2018-02 and does not expect the adoption to have a significant impact on its condensed 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 (ASU 2018-07). The guidance expands the scope of the topic to include share-based payments granted to non-employees in exchange for goods or services. Upon adoption, the fair value of awards granted to non-employees will be determined as of the grant date, which will be recognized over the service period. Previous guidance required the awards to be remeasured at fair value periodically when determining the related expense. ASU 2018-07 is effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. For all other entities, the amendments are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted, but no earlier than an entity’s adoption date of Topic 606. The Company has not yet adopted ASU 2018-07 and does not expect the adoption to have a significant impact on its condensed consolidated financial statements. Recent Accounting Pronouncements—Adopted The Company adopted ASU No. 2016-09 (Topic 718), Improvements to Employee Share-Based Payments Accounting (ASU 2016-09), effective February 1, 2018. The Company elected to continue to estimate its forfeiture rate. The adoption of this standard did not have an effect on the statement of cash flows. In November 2016, the FASB issued ASU No. 2016-18 (Topic 230), Statement of Cash Flows, Restricted Cash (ASU 2016-18), which amends the guidance in ASC 230 Statement of Cash Flows and requires that entities show the changes in total of cash, cash equivalents, restricted cash, and restricted cash equivalents in their statement of cash flows. As a result, entities will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, and interim periods within those years, and is applied retrospectively when adopted. Early adoption is permitted. On February 1, 2018, the Company adopted ASU 2016-18 and is now presenting its cash and cash equivalents and restricted cash together in its condensed consolidated statements of cash flows. In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805) Clarifying the Definition of a Business (ASU 2017-01), which amends the guidance of FASB Accounting Standards Codification Topic 805, “Business Combinations,” adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. This guidance is effective for annual and interim periods beginning after December 15, 2017, and early adoption is permitted under certain circumstances. On February 1, 2018, the Company adopted ASU 2017-01 and the adoption did not have an impact on its condensed consolidated financial statements as no business combinations have occurred since adoption. In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment (ASU 2017-04), which removes the second step of the goodwill impairment test that requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. This guidance is effective for interim and annual reporting periods beginning after December 15, 2019 and will be applied prospectively. On February 1, 2018, the Company adopted ASU 2017-04 and the adoption did not have a significant impact on its condensed consolidated financial statements. In May 2017, the FASB issued ASU No. 2017-09, Compensation-Stock Compensation (Topic 718) Scope of Modification Accounting (ASU 2017-09), which clarifies which changes to the terms or conditions of a share-based payment award are subject to the guidance on modification accounting. Entities would apply the modification accounting guidance unless the value, vesting requirements, and classification of a share-based payment award are the same immediately before and after a change to the terms or conditions of the award. This guidance is effective for annual and interim periods beginning after December 15, 2017 and would be applied prospectively to awards modified on or after the effective date. Early adoption is permitted. On February 1, 2018, the Company adopted ASU 2017-09 and the adoption did not have a significant impact on its condensed consolidated financial statements.

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	6 Months Ended
	Jul. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid Expenses and Other Current Assets	Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands): July 31, January 31, Prepaid software subscriptions $ 3,458 $ 3,239 Prepaid insurance 1,502 445 Prepaid hosting costs 1,151 486 Prepaid rent 876 657 Taxes 542 533 Short-term deposits 380 480 Prepaid employee-related costs 158 132 Capitalized offering costs — 2,460 Other 726 870 Total $ 8,793 $ 9,302

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jul. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The carrying amounts of the Company’s financial instruments, which include cash and cash equivalents, restricted cash, accounts receivable, accounts payable, other accrued expenses, debt and capital lease obligations, approximate their fair values due to their relatively short maturity, and in the case of leases, interest rates approximate current market interest rates. The accounting guidance for fair value measurements establishes a three-tier hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value as follows: Level input Input definition Level 1 Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets Level 2 Inputs other than quoted prices included within Level 1 that are observable for the asset or liability through corroboration with market data at the measurement date Level 3 Unobservable inputs that reflect management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date In general, and where applicable, the Company uses quoted prices in active markets for identical assets or liabilities to determine fair value. If quoted prices in active markets for identical assets or liabilities are not available to determine fair value, then the Company uses quoted prices for similar assets and liabilities or inputs other than the quoted prices that are observable either directly or indirectly. The Company does not have any significant assets or liabilities that utilize Level 2 or Level 3 (unobservable) inputs. As of July 31, 2018 and January 31, 2018 , the Company held cash equivalents and restricted cash of approximately $162.6 million and $35.1 million , respectively, in money market funds measured at fair value using Level 1 inputs.

Property and Equipment, Net

Property and Equipment, Net	6 Months Ended
	Jul. 31, 2018
Property, Plant and Equipment [Abstract]
Property and Equipment, Net	Property and Equipment, Net Property and equipment consisted of the following (in thousands): July 31, January 31, Servers $ 14,413 $ 11,283 Computer equipment 9,164 6,885 Software 8,521 7,148 Leasehold improvements 4,066 1,968 Furniture and fixtures 2,539 1,446 Vehicles 23 25 38,726 28,755 Less accumulated depreciation and amortization (21,802 ) (18,551 ) Total $ 16,924 $ 10,204 Depreciation and amortization expense was $1.7 million and $2.9 million for the three and six months ended July 31, 2018 , respectively, and $1.3 million and $2.5 million for the three and six months ended July 31, 2017 , respectively. Depreciation and amortization expense is included in operating expenses and cost of revenue in the accompanying unaudited condensed consolidated statements of comprehensive loss. As of July 31, 2018 and January 31, 2018 , capitalized internal-use software costs, net of amortization, were $4.1 million and $3.4 million , respectively. Internal-use software amortization recorded to cost of subscription revenue was $0.3 million and $0.6 million for the three and six months ended July 31, 2018 , respectively, and $0.3 million and $0.7 million for the three and six months ended July 31, 2017 , respectively.

Purchased Intangible Assets

Purchased Intangible Assets	6 Months Ended
	Jul. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Purchased Intangible Assets	Purchased Intangible Assets The following table summarizes the purchased intangible asset balances (in thousands): As of July 31, 2018 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 7,697 $ (3,475 ) $ 4,222 Customer relationships 5,933 (865 ) 5,068 Trade names 909 (151 ) 758 Total $ 14,539 $ (4,491 ) $ 10,048 As of January 31, 2018 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 7,697 $ (2,666 ) $ 5,031 Customer relationships 5,933 (494 ) 5,439 Trade names 909 (87 ) 822 Total $ 14,539 $ (3,247 ) $ 11,292 Amortization expense related to purchased intangible assets was approximately $0.6 million and $1.2 million for the three and six months ended July 31, 2018 , respectively, and $0.5 million and $0.7 million for the three and six months ended July 31, 2017 , respectively. Amortization expense related to purchased intangible assets is included in cost of subscription revenue in the accompanying unaudited condensed consolidated statements of comprehensive loss.

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	6 Months Ended
	Jul. 31, 2018
Payables and Accruals [Abstract]
Accrued Expenses and Other Current Liabilities	Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of the following (in thousands): July 31, January 31, Accrued goods and services taxes $ 3,172 $ 2,488 Accrued outside services and consulting 2,542 2,006 Employee early exercised stock options 1,130 556 Accrued property and equipment purchases 980 — Accrued sales and use tax liability 465 431 Deferred rent, current 922 604 Accrued legal fees 254 828 Accrued IPO-related costs 232 1,120 Accrued foreign income taxes 217 221 Accrued acquisition-related payments — 12,558 Other accrued expenses 4,763 3,684 Total $ 14,677 $ 24,496

Other Long-Term Liabilities

Other Long-Term Liabilities	6 Months Ended
	Jul. 31, 2018
Other Liabilities Disclosure [Abstract]
Other Long-Term Liabilities	Other Long-Term Liabilities Other long-term liabilities consisted of the following (in thousands): July 31, January 31, Deferred rent, net of current portion $ 741 $ 356 Long-term income taxes payable 436 472 Early exercised common stock options 304 139 Other 375 201 Total $ 1,856 $ 1,168

Debt

Debt	6 Months Ended
	Jul. 31, 2018
Debt Disclosure [Abstract]
Debt	Debt On June 14, 2017, the Company entered into a Loan and Security Agreement (Debt Agreement) with Silicon Valley Bank. The Debt Agreement established a revolving loan and a term loan facility in the amount of $10.0 million and $30.0 million , respectively. Revolving Loan. The Debt Agreement allows the Company to borrow up to $10.0 million until June 2019 in revolving loans. The revolving loan is intended to support working capital and general corporate uses and is available to the Company to draw down upon anytime up to 24 months from the effective date of the agreement. Advances drawn down under the revolving loan incur interest at the prime rate as published by the Wall Street Journal (WSJ Prime Rate) which is due monthly on any amounts drawn down, with the principal due at maturity. Any outstanding amounts must be fully repaid before June 14, 2019. The Company is required to pay an annual fee of $20,000 on this revolving loan, regardless of any amounts drawn down. As of July 31, 2018 , the Company had not drawn down any amounts under this revolving loan. Term Loan. The Debt Agreement allowed the Company to borrow up to $30.0 million in the form of term loans until June 14, 2018. In June 2017, the Company drew down $15.0 million to partially finance the acquisition of Leeyo Software, Inc. (Leeyo), and the remaining $15.0 million was available for borrowing until June 14, 2018 but was not drawn down. Any outstanding amounts under the term loan accrue interest at the WSJ Prime rate plus 1.00% . The interest rate was 6.00% as of July 31, 2018 . Beginning June 2018, the Company is required to make equal monthly payments of principal and interest over 36 months until the term loan is repaid. The Company may prepay all outstanding principal and accrued interest at any time without penalty. The Company will incur a facility fee of 1.5% upon the earlier to occur of prepayment or the termination of the facility. As of July 31, 2018 , the Company had $14.6 million outstanding under the term loan. Both the revolving loan and the term loan are subject to a certain financial covenant to maintain an adjusted quick ratio of no less than 1.10 :1.00. As of July 31, 2018 , the Company was in compliance with this financial covenant. The Debt Agreement also imposes certain limitations with respect to lines of business, mergers, investments and acquisitions, additional indebtedness, distributions, guarantees, liens, and encumbrances. The Company was also in compliance with these restrictions as of July 31, 2018 . The Company incurred transaction costs and fees payable to the lender related to the issuance of the term loan. The amount, net of amortization, is immaterial and is presented as a reduction to the carrying amount of the term loan and is presented under debt in the Company’s condensed consolidated balance sheets. The Company’s indebtedness under the Debt Agreement is secured by a lien on substantially all of its assets, including its intellectual property.

Income Taxes

Income Taxes	6 Months Ended
	Jul. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For each of the three month periods ended July 31, 2018 and 2017 , the Company recorded a tax provision of $0.2 million on pretax losses of $19.4 million and $14.6 million , respectively. The effective tax rates for the three month periods ended July 31, 2018 and 2017 were (1.0)% and (1.6)% , respectively. The effective tax rate for the three months ended July 31, 2018 and 2017 differs from the statutory rate primarily as a result of providing no benefit on pretax losses incurred in the United States. For the three months ended July 31, 2018 , the Company maintained a full valuation allowance on its U.S. federal and state net deferred tax assets as it was more likely than not that those deferred tax assets will not be realized. For each of the six month periods ended July 31, 2018 and 2017 , the Company recorded a tax provision of $0.4 million on pretax losses of $38.6 million and $22.6 million , respectively. The effective tax rates for the six month periods ended July 31, 2018 and 2017 were (1.0)% and (1.6)% , respectively. The effective tax rate for the six months ended July 31, 2018 and 2017 differs from the statutory rate primarily as a result of providing no benefit on pretax losses incurred in the United States. For the six months ended July 31, 2018 , the Company maintained a full valuation allowance on its U.S. federal and state net deferred tax assets as it was more likely than not that those deferred tax assets will not be realized. On December 22, 2017, the Tax Act was signed into law making significant changes to the Internal Revenue Code. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017, and changes to how the United States imposes income tax on multinational corporations. In December 2017, the SEC staff issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118), which allows the Company to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. In fiscal 2018, we calculated an estimate of the expected decrease on our existing deferred tax balances due to the decrease in the tax rate. We determined the impact to be approximately a $30.0 million decrease to our deferred tax assets. Because we provide a valuation allowance against our tax assets, we consequently adjusted the valuation allowance to compensate for this reduction in the provision. As of January 31, 2018, we had not completed our accounting for the tax effects of enactment of the Tax Reform Act; however, we have made a reasonable estimate of the effects on our existing deferred tax balances and the one-time transition tax. We will continue to assess our provision for income taxes as future guidance is issued, but do not currently anticipate significant revisions will be necessary. Any such revisions will be treated in accordance with the measurement period guidance outlined in Staff Accounting Bulletin No. 118.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jul. 31, 2018
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Convertible Preferred Stock Immediately prior to the completion of the IPO, all shares of convertible preferred stock then outstanding were converted into 62.0 million shares of Class B common stock on a one-to-one basis. As of July 31, 2018 , there were no shares of convertible preferred stock issued and outstanding. Common Stock Prior to the IPO, all shares of common stock then outstanding were reclassified into Class B common stock. Shares offered and sold in the IPO consisted of newly authorized shares of Class A common stock. As of July 31, 2018 , the Company had authorized 500 million shares of Class A common stock and 500 million shares of Class B common stock, each with a par value of $0.0001 per share. As of July 31, 2018 , 45.0 million shares of Class A common stock and 62.7 million shares of Class B common stock were issued and outstanding. Holders of Class A and Class B common stock are entitled to one vote per share and ten votes per share, respectively, and the shares of Class A common stock and Class B common stock are identical, except for voting and conversion rights.

Employee Stock Plans

Employee Stock Plans	6 Months Ended
	Jul. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Stock Plans	Employee Stock Plans Equity Incentive Plans In March 2018, the Company’s Board of Directors adopted and its stockholders approved the 2018 Equity Incentive Plan (2018 Plan). The 2018 Plan authorizes the award of stock options, restricted stock awards, stock appreciation rights, RSUs, performance awards, and stock bonuses. As of July 31, 2018 , approximately 9.0 million shares of Class A common stock were reserved and available for issuance under the 2018 Plan. In addition, as of July 31, 2018 , 17.0 million stock options and RSUs exercisable or settleable for Class B common stock were outstanding in the aggregate under the Company’s 2006 Stock Plan (2006 Plan) and 2015 Equity Incentive Plan (2015 Plan), which plans were terminated in May 2015 and April 2018, respectively. The 2006 Plan and 2015 Plan continue to govern outstanding equity awards granted thereunder. Stock Options The following table summarizes stock option activity and related information (in thousands except exercise price and contractual term): Shares Subject To Outstanding Stock Options Weighted Average Exercise Price Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Balance as of January 31, 2018 15,401 $ 3.56 7.91 $ 83,322 Granted 3,617 8.16 Exercised (2,246 ) 2.96 Forfeited (323 ) 5.23 Balance as of July 31, 2018 16,449 4.62 7.99 $ 327,449 Exercisable as of July 31, 2018 15,747 4.53 7.94 314,980 Vested and expected to vest as of July 31, 2018 14,453 4.48 7.88 $ 289,845 The weighted average grant date fair value per share of options granted during the three months ended July 31, 2018 was $6.85 , and was $6.76 and $1.47 for the six months ended July 31, 2018 and 2017 , respectively. The aggregate intrinsic value of options exercised during the three months ended July 31, 2018 was $5.9 million , and was $17.9 million and $1.8 million for the six months ended July 31, 2018 and 2017 , respectively. As of July 31, 2018 , there was $27.1 million of unrecognized compensation cost related to unvested stock options, which is expected to be recognized over the next 3.1 years . The Company used the Black-Scholes option-pricing model to estimate the fair value of its stock options granted with the following assumptions: Three Months Ended Six Months Ended 2018 2017 2018 2017 Fair value of common stock $19.63 $5.42 $12.28 - $19.63 $3.28 - $5.42 Expected volatility 29.9% 42.3% 29.9% - 40.9% 40.0% - 42.6% Expected term (years) 5.98 - 6.05 5.99 5.06 - 6.44 5.14 - 6.99 Risk-free interest rate 2.87% 1.95% 2.62% - 2.87% 1.89% - 2.26% Expected dividend yield — — — — Options Subject to Early Exercise At the discretion of the board of directors, certain options may be exercisable immediately at the date of grant but are subject to a repurchase right, under which the Company may buy back any unvested shares at the lower of their original exercise price or then current fair market value in the event of an employee’s termination prior to vesting. The consideration received for an exercise of an unvested option is considered to be a deposit of the exercise price and the related dollar amount is recorded as a liability. The liabilities are reclassified into equity as the awards vest. As of July 31, 2018 and January 31, 2018 , the Company had $1.4 million and $0.7 million , respectively, recorded in accrued expenses and other current liabilities, and other long-term liabilities, related to early exercises of options to acquire 0.3 million and 0.2 million shares of common stock, respectively. RSU and Restricted Stock Award Activity The following table summarizes RSU and restricted stock award activity and related information for the six months ended July 31, 2018 (in thousands except grant date fair value): Number of RSU and Restricted Shares Outstanding Weighted-Average Grant Date Fair Value Balance as of January 31, 2018 3,037 $ 5.37 Granted 234 20.18 Vested (737 ) 5.49 Forfeited (31 ) 6.30 Balance as of July 31, 2018 2,503 $ 6.71 As of July 31, 2018 , there was $12.7 million of unrecognized compensation cost related to unvested RSUs and restricted stock awards, which is expected to be recognized over the next 2.4 years . 2018 Employee Stock Purchase Plan In March 2018, the Company adopted the 2018 Employee Stock Purchase Plan (ESPP), which became effective on the date of the Prospectus. The ESPP initially reserved and authorized the issuance of up to a total of 2.4 million shares of Class A common stock to participating employees. The initial offering period began April 11, 2018 and will end on June 14, 2020 with purchase dates of December 14, 2018, June 14, 2019, December 14, 2019 and June 14, 2020. Except for the initial offering period, the ESPP provides for 24-month offering periods beginning June 15 and December 15 of each year, and each offering period will consist of four six-month purchase periods. On each purchase date, ESPP participants will purchase shares of the Company’s Class A common stock at a price per share equal to 85% of the lesser of (1) the fair market value of the Class A common stock on the offering date or (2) the fair market value of the Class A common stock on the purchase date. As of July 31, 2018 , there was approximately $5.5 million of unrecognized stock-based compensation expense related to the ESPP that is expected to be recognized over the remaining term of the initial offering period. The Company estimated the fair value of ESPP purchase rights using a Black-Scholes option pricing model with the following assumptions: Three Months Ended Six Months Ended 2018 2017 2018 2017 Fair value of common stock $ 14.00 $ — $ 14.00 $ — Expected volatility 24.6% - 29.9% — 24.6% - 29.9% — Expected term (in years) 0.68 - 2.18 — 0.68 - 2.18 — Risk-free interest rate 2.01% - 2.36% — 2.01% - 2.36% — Expected dividend yield — — — — Stock-Based Compensation Expense Stock-based compensation expense was recorded in the following cost and expense categories in the Company’s unaudited condensed consolidated statements of comprehensive loss (in thousands): Three Months Ended Six Months Ended 2018 2017 2018 2017 Cost of subscription revenue $ 433 $ 163 $ 756 $ 251 Cost of professional services revenue 1,399 356 2,430 496 Research and development 1,416 479 2,464 808 Sales and marketing 1,522 557 3,112 963 General and administrative 890 244 1,501 435 Total stock-based compensation expense $ 5,660 $ 1,799 $ 10,263 $ 2,953

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jul. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies (a) Leases The Company periodically leases facilities and equipment under noncancelable capital and operating leases. The terms of the lease agreements may provide for rental payments on a graduated basis, and accordingly, the Company recognizes related rent expense on a straight-line basis over the entire lease term, and has accrued for rent expense incurred but not paid. The Company has capital lease agreements with a lender to use data center equipment and related software. The lease agreements provide the Company the ability to finance its equipment purchases over an extended period of time. At the end of the lease terms, the Company is obligated to purchase the equipment. In connection with the equipment financing agreement, the Company had outstanding bank issued irrevocable letters of credit of $4.4 million as of July 31, 2018 , classified as restricted cash on its unaudited condensed consolidated balance sheet. As of July 31, 2018 , the Company had operating leases for its offices in the United States and other locations around the world. The Company also had operating leases for facilities related to its U.S. data centers in Las Vegas, Nevada and Santa Clara, California. The initial lease term for these facilities ranged from three to seven years and includes approximately 176,000 square feet of space. In connection with these leased facilities, the Company had outstanding bank issued irrevocable letters of credit on the leases of $2.3 million as of July 31, 2018 , classified as restricted cash on the Company’s unaudited condensed consolidated balance sheet. Certain facility lease agreements contain allowances, rent holidays, and escalation provisions. For these leases, the Company recognizes the related rental expense on a straight-line basis over the lease period of the facility and records the difference between amounts charged to operations and amounts paid as deferred rent. Deferred rent was $1.7 million and $1.0 million as of July 31, 2018 and January 31, 2018 , respectively, and is included in accrued expenses and other current liabilities and other long-term liabilities in the condensed consolidated balance sheets. Rent expense was $2.7 million and $4.4 million for the three and six months ended July 31, 2018 , respectively, and $1.4 million and $2.7 million for the three and six months ended July 31, 2017 , respectively. As of July 31, 2018 , the future minimum lease payments under capital and operating leases by fiscal year were as follows (in thousands): Capital Leases Operating Leases Remainder of 2019 $ 1,134 $ 3,180 2020 1,114 7,340 2021 578 5,568 2022 363 5,686 2023 — 5,560 Thereafter — 4,362 Total future lease commitments $ 3,189 $ 31,696 (b) Legal Matters The Company may be subject to legal proceedings, as well as demands, claims and threatened litigation that arise in the normal course of its business. Although the results of litigation and claims cannot be predicted with certainty, the Company currently believes that the final outcome of such matters will not have a material adverse effect on the Company’s results of operations or financial condition.

Net Loss Per Share Attributable

Net Loss Per Share Attributable to Common Stockholders	6 Months Ended
	Jul. 31, 2018
Earnings Per Share [Abstract]
Net Loss Per Share Attributable to Common Stockholders	Net Loss Per Share Attributable to Common Stockholders Basic and diluted net loss per common share is presented in conformity with the two-class method required for participating securities. Class A and Class B common stock are the only outstanding equity in the Company. The rights of the holders of Class A and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to ten votes per share. Shares of Class B common stock may be converted into Class A common stock at any time at the option of the stockholder, and are automatically converted into Class A common stock upon sale or transfer, subject to certain limited exceptions. Basic net loss per share attributable to common stockholders is computed using the weighted-average number of common shares outstanding during the period. Diluted net loss per share attributable to common stockholders is computed using the weighted-average number of common shares and, if dilutive, potential common shares outstanding during the period. The dilutive effect of these potential common shares is reflected in diluted earnings per share by application of the treasury stock method. The following table presents the calculation of basic and diluted net loss per share attributable to common stockholders for the periods presented (in thousands, except per share data): Three Months Ended Six Months Ended 2018 2017 2018 2017 Numerator: Net loss $ (19,587 ) $ (14,841 ) $ (39,034 ) $ (22,967 ) Denominator: Weighted-average common shares outstanding, basic and diluted 105,146 26,417 75,529 25,654 Net loss per share attributable to common stockholders, basic and diluted $ (0.19 ) $ (0.56 ) $ (0.52 ) $ (0.90 ) Since the Company was in a loss position for all periods presented, basic net loss per share attributable to common stockholders is the same as diluted net loss per share attributable to common stockholders as the inclusion of all potential common shares outstanding would have been anti-dilutive. Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in thousands): As of July 31, 2018 2017 Conversion of convertible preferred stock — 61,984 Issued and outstanding stock options 16,449 13,327 Unvested restricted stock issued and outstanding 1,731 2,133 Unvested RSUs issued and outstanding 772 — Shares committed under ESPP 225 — Total 19,177 77,444

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jul. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Certain members of the Company’s Board of Directors serve or are closely affiliated with people who serve on the board of directors of companies that are customers or vendors of the Company. Certain of the Company’s executive officers also serve on the board of directors of companies that are customers or vendors of the Company. The Company had no related party transactions during the three months ended July 31, 2018 . In November 2017 and April 2018, the Company paid an aggregate $5.6 million of taxes owed in connection with restricted stock granted to two employees in exchange for full-recourse promissory notes, which notes were secured by 4.6 million shares of restricted common stock. The notes accrued interest at rates ranging from 1.85% to 2.72% and become payable in full upon the earlier of: (i) a change in control or (ii) January 12, 2019. Consistent with ASC 505-10-45, the notes receivable balance is presented as a deduction from stockholders’ equity. In August 2018, the notes were fully repaid.

Summary of Significant Accoun21

Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Policies)	6 Months Ended
	Jul. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated financial statements, which include the accounts of the Company and its wholly owned subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. All intercompany balances and transactions have been eliminated in consolidation. The unaudited condensed consolidated balance sheet as of January 31, 2018 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by U.S. GAAP on an annual reporting basis. The unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the balance sheet, statements of comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year ending January 31, 2019 or any future period. The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s final prospectus dated April 11, 2018 (Prospectus) filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with generally accepted accounting principles requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities at the date of the consolidated financial statements, as well as reported amounts of revenue and expenses during the reporting period. Actual results could differ materially from those estimates. The Company’s most significant estimates and assumptions are related to revenue recognition with respect to the determination of the relative selling prices for the Company’s services; determination of the fair value of the Company’s common stock for valuation of the Company’s stock-based awards issued prior to the completion of the IPO; valuation of the Company’s stock-based awards; estimates of allowance for doubtful accounts; estimates of the fair value of goodwill, intangible assets and other long-lived assets; and the valuation of deferred income tax assets and contingencies. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results may differ materially from these estimates under different assumptions or conditions.
Stock-Based Compensation	Stock-Based Compensation All stock-based compensation to employees, including the purchase rights issued under the Company’s 2018 Employee Stock Purchase Plan (ESPP), is based on the fair value of the awards on the date of grant. This fair value is recognized as an expense following the straight-line attribution method over the requisite service period of the entire award for stock options, restricted stock units (RSUs) and restricted stock; and over the offering period for the purchase rights issued under the ESPP. The Company uses the Black-Scholes option pricing model to measure the fair value of its stock options and the purchase rights issued under the ESPP. The fair value of the RSUs and restricted stock is determined using the fair value of the Company’s Class A common stock on the date of grant. Prior to the IPO, the fair value of the Company’s common stock was determined by the estimated fair value of the Company’s common stock at the time of grant. After the IPO, the Company uses the closing price of its Class A common stock on the date of grant for the fair value. Stock-based compensation expense is recorded net of estimated forfeitures in the Company’s unaudited condensed consolidated statements of comprehensive loss.
Recent Accounting Pronouncements	Recent Accounting Pronouncements—Not Yet Adopted The Jumpstart Our Business Startups Act (JOBS Act) allows the Company, as an “emerging growth company,” to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. The Company has elected to use this extended transition period under the JOBS Act. The adoption dates discussed below reflect this election. In May 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (ASU 2014-09) and has modified the standard thereafter. These standards replace existing revenue recognition rules with a comprehensive revenue measurement and recognition standard and expanded disclosure requirements. ASU 2014-09, as amended, became effective for public companies for the fiscal year beginning after December 15, 2017 and interim periods within that year. Private companies have an additional year to adopt the standard. The two permitted transition methods under the new standard are the full retrospective method, under which ASU 2014-09 would be applied to each prior reporting period presented and the cumulative effect of applying the standard would be recognized at the earliest period shown, or the modified retrospective method, under which the cumulative effect of applying ASU 2014-09 would be recognized at the date of initial application. The Company plans to adopt the new revenue standard when it becomes effective for the Company for the fiscal year ending January 31, 2020 (i.e., effective February 1, 2019). The Company is currently in the process of determining what method of adoption it plans to use. The Company is currently assessing the effect the guidance will have on its condensed consolidated financial statements. The adoption also affects the deferral of incremental commission costs of obtaining subscription contracts, which previously were expensed as incurred. Under the new standard, the Company will defer all incremental commission costs to obtain the contract and amortize them over the expected period of benefit. The Company is currently assessing the expected period of benefit. In addition, the new standard will expand the disclosures to be made in the Company’s consolidated financial statements, including disaggregation of revenue, information on contract balances, deferred contract acquisition costs, performance obligations, and remaining performance obligations. In January 2016, the FASB issued ASU No. 2016-01 (Subtopic 825-10), Financial Instruments—Overall: Recognition and Measurement of Financial Assets and Financial Liabilities (ASU 2016-01), which primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the FASB clarified guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. The accounting for other financial instruments, such as loans, investments in debt securities, and financial liabilities is largely unchanged. ASU 2016-01 is effective for fiscal years beginning after December 15, 2018, and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company has not yet adopted ASU 2016-01 and is currently evaluating the impact of adoption on its condensed consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02 (Topic 842)— Leases (ASU 2016-02), which supersedes the guidance in topic ASC 840, Leases. The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases today. ASU 2016-02 is effective for fiscal years beginning after December 15, 2019 and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted. The Company has not yet adopted ASU 2016-02 and is currently evaluating the impact of the adoption of this standard on its condensed consolidated financial statements. In February 2018, the FASB issued ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (ASU 2018-02). Under existing U.S. GAAP, the effects of changes in tax rates and laws on deferred tax balances are recorded as a component of income tax expense in the period in which the law was enacted. When deferred tax balances related to items originally recorded in accumulated other comprehensive income (loss) are adjusted, certain tax effects become stranded in accumulated other comprehensive income. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income (loss) to retained earnings (accumulated deficit) for stranded income tax effects resulting from the Tax Cuts and Jobs Act (the Tax Act). The amendments in this ASU also require certain disclosures about stranded income tax effects. The guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption in any period is permitted. The Company’s provisional adjustments recorded in the fiscal year ended January 31, 2018 to account for the impact of the Tax Act did not result in stranded tax effects. The Company has not yet adopted ASU 2018-02 and does not expect the adoption to have a significant impact on its condensed 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 (ASU 2018-07). The guidance expands the scope of the topic to include share-based payments granted to non-employees in exchange for goods or services. Upon adoption, the fair value of awards granted to non-employees will be determined as of the grant date, which will be recognized over the service period. Previous guidance required the awards to be remeasured at fair value periodically when determining the related expense. ASU 2018-07 is effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. For all other entities, the amendments are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted, but no earlier than an entity’s adoption date of Topic 606. The Company has not yet adopted ASU 2018-07 and does not expect the adoption to have a significant impact on its condensed consolidated financial statements. Recent Accounting Pronouncements—Adopted The Company adopted ASU No. 2016-09 (Topic 718), Improvements to Employee Share-Based Payments Accounting (ASU 2016-09), effective February 1, 2018. The Company elected to continue to estimate its forfeiture rate. The adoption of this standard did not have an effect on the statement of cash flows. In November 2016, the FASB issued ASU No. 2016-18 (Topic 230), Statement of Cash Flows, Restricted Cash (ASU 2016-18), which amends the guidance in ASC 230 Statement of Cash Flows and requires that entities show the changes in total of cash, cash equivalents, restricted cash, and restricted cash equivalents in their statement of cash flows. As a result, entities will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, and interim periods within those years, and is applied retrospectively when adopted. Early adoption is permitted. On February 1, 2018, the Company adopted ASU 2016-18 and is now presenting its cash and cash equivalents and restricted cash together in its condensed consolidated statements of cash flows. In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805) Clarifying the Definition of a Business (ASU 2017-01), which amends the guidance of FASB Accounting Standards Codification Topic 805, “Business Combinations,” adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. This guidance is effective for annual and interim periods beginning after December 15, 2017, and early adoption is permitted under certain circumstances. On February 1, 2018, the Company adopted ASU 2017-01 and the adoption did not have an impact on its condensed consolidated financial statements as no business combinations have occurred since adoption. In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment (ASU 2017-04), which removes the second step of the goodwill impairment test that requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. This guidance is effective for interim and annual reporting periods beginning after December 15, 2019 and will be applied prospectively. On February 1, 2018, the Company adopted ASU 2017-04 and the adoption did not have a significant impact on its condensed consolidated financial statements. In May 2017, the FASB issued ASU No. 2017-09, Compensation-Stock Compensation (Topic 718) Scope of Modification Accounting (ASU 2017-09), which clarifies which changes to the terms or conditions of a share-based payment award are subject to the guidance on modification accounting. Entities would apply the modification accounting guidance unless the value, vesting requirements, and classification of a share-based payment award are the same immediately before and after a change to the terms or conditions of the award. This guidance is effective for annual and interim periods beginning after December 15, 2017 and would be applied prospectively to awards modified on or after the effective date. Early adoption is permitted. On February 1, 2018, the Company adopted ASU 2017-09 and the adoption did not have a significant impact on its condensed consolidated financial statements.

Prepaid Expenses and Other Cu22

Prepaid Expenses and Other Current Assets (Tables)	6 Months Ended
	Jul. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets consisted of the following (in thousands): July 31, January 31, Prepaid software subscriptions $ 3,458 $ 3,239 Prepaid insurance 1,502 445 Prepaid hosting costs 1,151 486 Prepaid rent 876 657 Taxes 542 533 Short-term deposits 380 480 Prepaid employee-related costs 158 132 Capitalized offering costs — 2,460 Other 726 870 Total $ 8,793 $ 9,302

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	6 Months Ended
	Jul. 31, 2018
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment, Net	Property and equipment consisted of the following (in thousands): July 31, January 31, Servers $ 14,413 $ 11,283 Computer equipment 9,164 6,885 Software 8,521 7,148 Leasehold improvements 4,066 1,968 Furniture and fixtures 2,539 1,446 Vehicles 23 25 38,726 28,755 Less accumulated depreciation and amortization (21,802 ) (18,551 ) Total $ 16,924 $ 10,204

Purchased Intangible Assets (Ta

Purchased Intangible Assets (Tables)	6 Months Ended
	Jul. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Purchased Intangible Assets	The following table summarizes the purchased intangible asset balances (in thousands): As of July 31, 2018 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 7,697 $ (3,475 ) $ 4,222 Customer relationships 5,933 (865 ) 5,068 Trade names 909 (151 ) 758 Total $ 14,539 $ (4,491 ) $ 10,048 As of January 31, 2018 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 7,697 $ (2,666 ) $ 5,031 Customer relationships 5,933 (494 ) 5,439 Trade names 909 (87 ) 822 Total $ 14,539 $ (3,247 ) $ 11,292

Accrued Expenses and Other Cu25

Accrued Expenses and Other Current Liabilities (Tables)	6 Months Ended
	Jul. 31, 2018
Payables and Accruals [Abstract]
Summary of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities consisted of the following (in thousands): July 31, January 31, Accrued goods and services taxes $ 3,172 $ 2,488 Accrued outside services and consulting 2,542 2,006 Employee early exercised stock options 1,130 556 Accrued property and equipment purchases 980 — Accrued sales and use tax liability 465 431 Deferred rent, current 922 604 Accrued legal fees 254 828 Accrued IPO-related costs 232 1,120 Accrued foreign income taxes 217 221 Accrued acquisition-related payments — 12,558 Other accrued expenses 4,763 3,684 Total $ 14,677 $ 24,496

Other Long-Term Liabilities (Ta

Other Long-Term Liabilities (Tables)	6 Months Ended
	Jul. 31, 2018
Other Liabilities Disclosure [Abstract]
Summary of Other Long-Term Liabilities	Other long-term liabilities consisted of the following (in thousands): July 31, January 31, Deferred rent, net of current portion $ 741 $ 356 Long-term income taxes payable 436 472 Early exercised common stock options 304 139 Other 375 201 Total $ 1,856 $ 1,168

Employee Stock Plans (Tables)

Employee Stock Plans (Tables)	6 Months Ended
	Jul. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock Option Activity	The following table summarizes stock option activity and related information (in thousands except exercise price and contractual term): Shares Subject To Outstanding Stock Options Weighted Average Exercise Price Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Balance as of January 31, 2018 15,401 $ 3.56 7.91 $ 83,322 Granted 3,617 8.16 Exercised (2,246 ) 2.96 Forfeited (323 ) 5.23 Balance as of July 31, 2018 16,449 4.62 7.99 $ 327,449 Exercisable as of July 31, 2018 15,747 4.53 7.94 314,980 Vested and expected to vest as of July 31, 2018 14,453 4.48 7.88 $ 289,845
Schedule of Valuation Assumptions for Estimated Fair Value of Stock Options	The Company used the Black-Scholes option-pricing model to estimate the fair value of its stock options granted with the following assumptions: Three Months Ended Six Months Ended 2018 2017 2018 2017 Fair value of common stock $19.63 $5.42 $12.28 - $19.63 $3.28 - $5.42 Expected volatility 29.9% 42.3% 29.9% - 40.9% 40.0% - 42.6% Expected term (years) 5.98 - 6.05 5.99 5.06 - 6.44 5.14 - 6.99 Risk-free interest rate 2.87% 1.95% 2.62% - 2.87% 1.89% - 2.26% Expected dividend yield — — — —
Schedule of RSU and Restricted Stock Award Activity	The following table summarizes RSU and restricted stock award activity and related information for the six months ended July 31, 2018 (in thousands except grant date fair value): Number of RSU and Restricted Shares Outstanding Weighted-Average Grant Date Fair Value Balance as of January 31, 2018 3,037 $ 5.37 Granted 234 20.18 Vested (737 ) 5.49 Forfeited (31 ) 6.30 Balance as of July 31, 2018 2,503 $ 6.71
Schedule of Valuation Assumptions for Estimated Fair Value of Employee Stock Purchase Plan	The Company estimated the fair value of ESPP purchase rights using a Black-Scholes option pricing model with the following assumptions: Three Months Ended Six Months Ended 2018 2017 2018 2017 Fair value of common stock $ 14.00 $ — $ 14.00 $ — Expected volatility 24.6% - 29.9% — 24.6% - 29.9% — Expected term (in years) 0.68 - 2.18 — 0.68 - 2.18 — Risk-free interest rate 2.01% - 2.36% — 2.01% - 2.36% — Expected dividend yield — — — —
Schedule of Stock-based Compensation Expense	Stock-based compensation expense was recorded in the following cost and expense categories in the Company’s unaudited condensed consolidated statements of comprehensive loss (in thousands): Three Months Ended Six Months Ended 2018 2017 2018 2017 Cost of subscription revenue $ 433 $ 163 $ 756 $ 251 Cost of professional services revenue 1,399 356 2,430 496 Research and development 1,416 479 2,464 808 Sales and marketing 1,522 557 3,112 963 General and administrative 890 244 1,501 435 Total stock-based compensation expense $ 5,660 $ 1,799 $ 10,263 $ 2,953

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jul. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments Under Operating Leases	As of July 31, 2018 , the future minimum lease payments under capital and operating leases by fiscal year were as follows (in thousands): Capital Leases Operating Leases Remainder of 2019 $ 1,134 $ 3,180 2020 1,114 7,340 2021 578 5,568 2022 363 5,686 2023 — 5,560 Thereafter — 4,362 Total future lease commitments $ 3,189 $ 31,696
Schedule of Future Minimum Lease Payments Under Capital Leases	As of July 31, 2018 , the future minimum lease payments under capital and operating leases by fiscal year were as follows (in thousands): Capital Leases Operating Leases Remainder of 2019 $ 1,134 $ 3,180 2020 1,114 7,340 2021 578 5,568 2022 363 5,686 2023 — 5,560 Thereafter — 4,362 Total future lease commitments $ 3,189 $ 31,696

Net Loss Per Share Attributab29

Net Loss Per Share Attributable to Common Stockholders (Tables)	6 Months Ended
	Jul. 31, 2018
Earnings Per Share [Abstract]
Summary of Basic and Diluted Net Loss Per Share	The following table presents the calculation of basic and diluted net loss per share attributable to common stockholders for the periods presented (in thousands, except per share data): Three Months Ended Six Months Ended 2018 2017 2018 2017 Numerator: Net loss $ (19,587 ) $ (14,841 ) $ (39,034 ) $ (22,967 ) Denominator: Weighted-average common shares outstanding, basic and diluted 105,146 26,417 75,529 25,654 Net loss per share attributable to common stockholders, basic and diluted $ (0.19 ) $ (0.56 ) $ (0.52 ) $ (0.90 )
Schedule of Potential Dilutive Securities Not Included in the Diluted Per Share Calculations	Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in thousands): As of July 31, 2018 2017 Conversion of convertible preferred stock — 61,984 Issued and outstanding stock options 16,449 13,327 Unvested restricted stock issued and outstanding 1,731 2,133 Unvested RSUs issued and outstanding 772 — Shares committed under ESPP 225 — Total 19,177 77,444

Overview and Basis of Present30

Overview and Basis of Presentation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	6 Months Ended
	Apr. 30, 2018	Jul. 31, 2018	Jul. 31, 2017
Class of Stock [Line Items]
Public offering price (in dollars per share)	$ 14
Aggregate proceeds received, net		$ 164,703	$ 0
Class A common stock
Class of Stock [Line Items]
Common stock outstanding (in shares)		45,000,000
Class B common stock
Class of Stock [Line Items]
Shares of common stock issued upon conversion of convertible preferred stock	62,000,000
Number of common shares issued for each share of convertible preferred stock	1
Common stock outstanding (in shares)		62,700,000
IPO
Class of Stock [Line Items]
Shares issued and sold (in shares)	12,700,000
Aggregate proceeds received, net	$ 162,200
Over-Allotment Option
Class of Stock [Line Items]
Shares issued and sold (in shares)	1,700,000

Prepaid Expenses and Other Cu31

Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid software subscriptions	$ 3,458	$ 3,239
Prepaid insurance	1,502	445
Prepaid hosting costs	1,151	486
Prepaid rent	876	657
Taxes	542	533
Short-term deposits	380	480
Prepaid employee-related costs	158	132
Capitalized offering costs	0	2,460
Other	726	870
Total	$ 8,793	$ 9,302

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	Jul. 31, 2018	Jan. 31, 2018
Fair Value Level 1 Inputs | Money Market Funds
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Cash equivalents and restricted cash	$ 162.6	$ 35.1

Property and Equipment, Net - S

Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 38,726	$ 28,755
Less accumulated depreciation and amortization	(21,802)	(18,551)
Total	16,924	10,204
Servers
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,413	11,283
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,164	6,885
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,521	7,148
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,066	1,968
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,539	1,446
Vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 23	$ 25

Property and Equipment, Net - N

Property and Equipment, Net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017	Jan. 31, 2018
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 1.7	$ 1.3	$ 2.9	$ 2.5
Internal-use software
Property, Plant and Equipment [Line Items]
Capitalized internal-use software costs	4.1		4.1		$ 3.4
Internal-use software amortization	$ 0.3	$ 0.3	$ 0.6	$ 0.7

Purchased Intangible Assets - S

Purchased Intangible Assets - Summary of Purchased Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 14,539	$ 14,539
Accumulated Amortization	(4,491)	(3,247)
Net Carrying Amount	10,048	11,292
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,697	7,697
Accumulated Amortization	(3,475)	(2,666)
Net Carrying Amount	4,222	5,031
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,933	5,933
Accumulated Amortization	(865)	(494)
Net Carrying Amount	5,068	5,439
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	909	909
Accumulated Amortization	(151)	(87)
Net Carrying Amount	$ 758	$ 822

Purchased Intangible Assets - N

Purchased Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense related to purchased intangible assets	$ 0.6	$ 0.5	$ 1.2	$ 0.7

Accrued Expenses and Other Cu37

Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Payables and Accruals [Abstract]
Accrued goods and services taxes	$ 3,172	$ 2,488
Accrued outside services and consulting	2,542	2,006
Employee early exercised stock options	1,130	556
Accrued property and equipment purchases	980	0
Accrued sales and use tax liability	465	431
Deferred rent, current	922	604
Accrued legal fees	254	828
Accrued IPO-related costs	232	1,120
Accrued foreign income taxes	217	221
Accrued acquisition-related payments	0	12,558
Other accrued expenses	4,763	3,684
Total	$ 14,677	$ 24,496

Other Long-Term Liabilities - S

Other Long-Term Liabilities - Summary of Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Other Long-Term Liabilities
Deferred rent, net of current portion	$ 741	$ 356
Long-term income taxes payable	436	472
Early exercised common stock options	304	139
Other	375	201
Total	$ 1,856	$ 1,168

Debt - Narrative (Details)

Debt - Narrative (Details) - Silicon Valley Bank Debt Agreement	1 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)	Jul. 31, 2018USD ($)payment	Jun. 14, 2017USD ($)
Revolving Loan
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity		$ 10,000,000	$ 10,000,000
Line of credit facility term from effective date of agreement		24 months
Line of credit facility expiration date		Jun. 14, 2019
Annual fee on loan		$ 20,000
Term Loan
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity		$ 30,000,000	$ 30,000,000
Amount withdrawn from line of credit	$ 15,000,000
Line of credit remaining borrowing capacity	$ 15,000,000
Effective interest rate (percent)		6.00%
Number of installments in line of credit facility | payment		36
Frequency of periodic payment		Monthly
Prepayment or termination fee (percent)		1.50%
Amount drawn under credit facility		$ 14,600,000
Maximum
Line of Credit Facility [Line Items]
Adjusted quick ratio for debt agreement covenant		110.00%
WSJ Prime Rate | Term Loan
Line of Credit Facility [Line Items]
Variable interest rate basis		WSJ Prime rate plus 1.00%
Variable interest rate (percent)		1.00%

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Income Tax Disclosure [Abstract]
Income tax provision		$ 201	$ 239	$ 391	$ 371
Loss before income taxes		$ (19,386)	$ (14,602)	$ (38,643)	$ (22,596)
Effective tax rates		(1.00%)	(1.60%)	(1.00%)	(1.60%)
Provisional adjustment to deferred tax assets related to Tax Cuts and Jobs Act	$ 30,000

Stockholders' Equity - Narrativ

Stockholders' Equity - Narrative (Details) - $ / shares	1 Months Ended	6 Months Ended
	Apr. 30, 2018	Jul. 31, 2018
Class of Stock [Line Items]
Preferred stock issued (in shares)		0
Preferred stock outstanding (in shares)		0
Class A common stock
Class of Stock [Line Items]
Common stock authorized (in shares)		500,000,000
Common stock par value (in dollars per share)		$ 0.0001
Common stock issued (in shares)		45,000,000
Common stock outstanding (in shares)		45,000,000
Common stock voting rights		one vote per share
Class B common stock
Class of Stock [Line Items]
Shares of common stock issued upon conversion of convertible preferred stock	62,000,000
Number of common shares issued for each share of convertible preferred stock	1
Common stock authorized (in shares)		500,000,000
Common stock par value (in dollars per share)		$ 0.0001
Common stock issued (in shares)		62,700,000
Common stock outstanding (in shares)		62,700,000
Common stock voting rights		ten votes per share

Employee Stock Plans - Narrativ

Employee Stock Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 31, 2018	Jul. 31, 2018	Jul. 31, 2018	Jul. 31, 2017	Apr. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of options granted (in dollars per share)		$ 6.85	$ 6.76	$ 1.47
Aggregate intrinsic value of options exercised		$ 5,900	$ 17,900	$ 1,800
Exercise of stock options, value		314,980	$ 314,980
Exercise of stock options (in shares)			2,246,000
2018 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price, percentage of fair market value			85.00%
Unrecognized stock-based compensation expense related to ESPP		$ 5,500	$ 5,500
Class A common stock | 2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved and available for issuance (in shares)		9,000,000	9,000,000
Class A common stock | 2018 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved and available for issuance (in shares)					2,400,000
Stock Options and RSUs | 2006 Stock Plan and 2015 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate equity awards outstanding (in shares)		17,000,000	17,000,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		$ 27,100	$ 27,100
Unrecognized compensation cost, recognition period			3 years 1 month 6 days
Stock Options Subject to Early Exercise | Accrued Expenses and Other Current Liabilities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of stock options, value	$ 700	$ 1,400	$ 1,400
Stock Options Subject to Early Exercise | Other Long-term Liabilities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of stock options (in shares)	200,000		300,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)		0	0
RSUs and Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		$ 12,700	$ 12,700
Unrecognized compensation cost, recognition period			2 years 4 months 23 days
Restricted stock granted (in shares)			234,000

Employee Stock Plans - Schedule

Employee Stock Plans - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Jul. 31, 2018	Jul. 31, 2018	Jul. 31, 2017	Jan. 31, 2018
Shares Subject To Outstanding Stock Options
Outstanding, beginning balance (in shares)		15,401
Granted (in shares)		3,617
Exercised (in shares)		(2,246)
Forfeited (in shares)		(323)
Outstanding, ending balance (in shares)	16,449	16,449		15,401
Exercisable (in shares)	15,747	15,747
Vested and expected to vest (in shares)	14,453	14,453
Weighted Average Exercise Price
Weighted average exercise price, beginning balance (in dollars per share)		$ 3.56
Granted (in dollars per share)		8.16
Exercised (in dollars per share)		2.96
Forfeited (in dollars per share)		5.23
Weighted average exercise price, ending balance (in dollars per share)	$ 4.62	4.62		$ 3.56
Exercisable (in dollars per share)	4.53	4.53
Vested and expected to vest (in dollars per share)	$ 4.48	$ 4.48
Average Remaining Contractual Term (Years)
Average Remaining Contractual Term (Years), Outstanding		7 years 11 months 26 days		7 years 10 months 28 days
Average Remaining Contractual Term (Years), Exercisable		7 years 11 months 8 days
Average Remaining Contractual Term (Years), Vested and expected to vest		7 years 10 months 17 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value, beginning balance		$ 83,322
Aggregate Intrinsic Value, exercised	$ 5,900	17,900	$ 1,800
Aggregate Intrinsic Value, ending balance	327,449	327,449		$ 83,322
Aggregate Intrinsic Value, exercisable	314,980	314,980
Aggregate Intrinsic Value, vested and expected to vest	$ 289,845	$ 289,845

Employee Stock Plans - Valuatio

Employee Stock Plans - Valuation Assumptions for Estimated Fair Value of Stock Options (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of common stock (in dollars per share)			$ 8.16
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of common stock (in dollars per share)	$ 19.63	$ 5.42	$ 12.28
Expected volatility	29.90%	42.30%
Expected volatility, minimum			29.90%	40.00%
Expected volatility, maximum			40.90%	42.60%
Expected term (years)		5 years 11 months 26 days
Risk-free interest rate	2.87%	1.95%
Risk-free interest rate, minimum			2.62%	1.89%
Risk-free interest rate, maximum			2.87%	2.26%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of common stock (in dollars per share)				$ 3.28
Expected term (years)	5 years 11 months 23 days		5 years 22 days	5 years 1 month 20 days
Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of common stock (in dollars per share)			$ 19.63	$ 5.42
Expected term (years)	6 years 18 days		6 years 5 months 9 days	6 years 11 months 26 days

Employee Stock Plans - Schedu45

Employee Stock Plans - Schedule of RSU and Restricted Stock Award Activity (Details) - RSUs and Restricted Shares shares in Thousands	6 Months Ended
	Jul. 31, 2018$ / sharesshares
Number of RSU and Restricted Shares Outstanding
Outstanding, beginning balance (in shares) | shares	3,037
Granted (in shares) | shares	234
Vested (in shares) | shares	(737)
Forfeited (in shares) | shares	(31)
Outstanding, ending balance (in shares) | shares	2,503
Weighted-Average Grant Date Fair Value
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 5.37
Granted (in dollars per share) | $ / shares	20.18
Vested (in dollars per share) | $ / shares	5.49
Forfeited (in dollars per share) | $ / shares	6.30
Outstanding, ending balance (in dollars per share) | $ / shares	$ 6.71

Employee Stock Plans - Valuat46

Employee Stock Plans - Valuation Assumptions for Estimated Fair Value of Employee Stock Purchase Plan (Details) - 2018 Employee Stock Purchase Plan	3 Months Ended	6 Months Ended
	Jul. 31, 2018$ / shares	Jul. 31, 2018$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of common stock (in dollars per share)	$ 14	$ 14
Expected volatility, minimum	24.60%	24.60%
Expected volatility, maximum	29.90%	29.90%
Risk-free interest rate, minimum	2.01%	2.01%
Risk-free interest rate, maximum	2.36%	2.36%
Expected dividend yield	0.00%	0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	8 months 5 days	8 months 5 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	2 years 2 months 5 days	2 years 2 months 5 days

Employee Stock Plans - Schedu47

Employee Stock Plans - Schedule of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Cost of Revenue
Stock-based compensation expense	$ 5,660	$ 1,799	$ 10,263	$ 2,953
Cost of subscription revenue
Cost of Revenue
Stock-based compensation expense	433	163	756	251
Cost of professional services revenue
Cost of Revenue
Stock-based compensation expense	1,399	356	2,430	496
Research and development
Cost of Revenue
Stock-based compensation expense	1,416	479	2,464	808
Sales and marketing
Cost of Revenue
Stock-based compensation expense	1,522	557	3,112	963
General and administrative
Cost of Revenue
Stock-based compensation expense	$ 890	$ 244	$ 1,501	$ 435

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) ft² in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2018USD ($)ft²	Jul. 31, 2017USD ($)	Jul. 31, 2018USD ($)ft²	Jul. 31, 2017USD ($)	Jan. 31, 2018USD ($)
Loss Contingencies [Line Items]
Deferred rent included in accrued expenses	$ 1.7		$ 1.7		$ 1
Rent expense	2.7	$ 1.4	4.4	$ 2.7
Capital Lease Agreements
Loss Contingencies [Line Items]
Letters of credit issued	4.4		4.4
Operating Lease Agreements
Loss Contingencies [Line Items]
Letters of credit issued	$ 2.3		$ 2.3
Operating leases, area | ft²	176		176
Minimum | Operating Lease Agreements
Loss Contingencies [Line Items]
Lease term			3 years
Maximum | Operating Lease Agreements
Loss Contingencies [Line Items]
Lease term			7 years

Commitments and Contingencies49

Commitments and Contingencies - Future Minimum Lease Payments (Details) $ in Thousands	Jul. 31, 2018USD ($)
Capital Leases
Remainder of 2019	$ 1,134
2,020	1,114
2,021	578
2,022	363
2,023	0
Thereafter	0
Total future lease commitments	3,189
Operating Leases
Remainder of 2019	3,180
2,020	7,340
2,021	5,568
2,022	5,686
2,023	5,560
Thereafter	4,362
Total future lease commitments	$ 31,696

Net Loss Per Share Attributab50

Net Loss Per Share Attributable to Common Stockholders - Summary of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Numerator:
Net loss	$ (19,587)	$ (14,841)	$ (39,034)	$ (22,967)
Denominator:
Weighted-average common shares outstanding, basic and diluted (in shares)	105,146	26,417	75,529	25,654
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.19)	$ (0.56)	$ (0.52)	$ (0.90)

Net Loss Per Share Attributab51

Net Loss Per Share Attributable to Common Stockholders - Schedule of Potential Dilutive Securities Not Included in the Diluted Per Share Calculations (Details) - shares shares in Thousands	6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation	19,177	77,444
Conversion of convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation	0	61,984
Issued and outstanding stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation	16,449	13,327
Unvested restricted stock issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation	1,731	2,133
Unvested RSUs issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation	772	0
Shares committed under ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation	225	0

Related Party Transactions - Na

Related Party Transactions - Narrative (Details) - Employees shares in Millions, $ in Millions	6 Months Ended
	Jul. 31, 2018shares	Apr. 30, 2018USD ($)employee
Related Party Transaction [Line Items]
Payment for taxes owed in connection with restricted stock award | $		$ 5.6
Number of employees in related party agreement | employee		2
Promissory note receivable | Minimum
Related Party Transaction [Line Items]
Promissory notes interest rate (percent)	1.85%
Promissory note receivable | Maximum
Related Party Transaction [Line Items]
Promissory notes interest rate (percent)	2.72%
Promissory note receivable | Restricted Stock
Related Party Transaction [Line Items]
Shares of restricted common stock that secure promissory notes (in shares) | shares	4.6