Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended			9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	[1]	Oct. 31, 2018	Oct. 31, 2017	[1]
Revenue	$ 372,779	$ 277,591		$ 937,608	$ 684,906
Cost of revenue	123,659	95,859		316,008	235,858
Gross profit	249,120	181,732		621,600	449,048
Operating expenses:
Research and development	90,783	68,927		253,306	203,716
Sales and marketing	146,903	116,971		413,019	326,286
General and administrative	38,651	25,406		99,572	67,664
Total operating expenses	276,337	211,304		765,897	597,666
Loss from operations	(27,217)	(29,572)		(144,297)	(148,618)
Other income (expense), net	(2,889)	1,138		(7,920)	6,399
Loss before provision for income taxes	(30,106)	(28,434)		(152,217)	(142,219)
Income tax provision (benefit)	(1,926)	970		390	2,755
Net loss	$ (28,180)	$ (29,404)	[2]	$ (152,607)	$ (144,974)	[2],[3]
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.12)	$ (0.14)		$ (0.66)	$ (0.69)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)	235,205	213,274		229,505	209,456
Product
Revenue	$ 298,863	$ 227,772		$ 735,449	$ 550,291
Cost of revenue	96,610	75,392		241,292	179,289
Support subscription
Revenue	73,916	49,819		202,159	134,615
Cost of revenue	$ 27,049	$ 20,467		$ 74,716	$ 56,569

[1] * Prior period information has been adjusted to reflect the adoption impact of ASC 606, which we adopted on February 1, 2018.

[2] * Prior period information has been adjusted to reflect the adoption impact of ASC 606, which we adopted on February 1, 2018.

[3] * Prior period information has been adjusted to reflect the adoption impact of ASC 606 and Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18), which we adopted on February 1, 2018