Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Revenue	$ 428,409	$ 372,779	$ 1,151,436	$ 937,608
Cost of revenue	127,771	123,659	366,092	316,008
Gross profit	300,638	249,120	785,344	621,600
Operating expenses:
Research and development	106,663	90,783	318,758	253,306
Sales and marketing	184,819	146,903	537,633	413,019
General and administrative	37,416	38,651	119,542	99,572
Total operating expenses	328,898	276,337	975,933	765,897
Loss from operations	(28,260)	(27,217)	(190,589)	(144,297)
Other income (expense), net	9	(2,889)	(2,459)	(7,920)
Loss before provision (benefit) for income taxes	(28,251)	(30,106)	(193,048)	(152,217)
Income tax provision (benefit)	1,731	(1,926)	3,288	390
Net loss	$ (29,982)	$ (28,180)	$ (196,336)	$ (152,607)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.12)	$ (0.12)	$ (0.78)	$ (0.66)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)	255,047	235,205	250,618	229,505
Product
Revenue	$ 323,268	$ 298,863	$ 862,137	$ 735,449
Cost of revenue	89,998	96,610	259,460	241,292
Support subscription
Revenue	105,141	73,916	289,299	202,159
Cost of revenue	$ 37,773	$ 27,049	$ 106,632	$ 74,716