Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Revenue
Total revenue	$ 108,108	$ 55,701	$ 204,185	$ 102,990
Cost of revenue
Total cost of revenue	31,582	18,575	60,856	37,969
Gross profit	76,526	37,126	143,329	65,021
Operating expenses
Sales and marketing	65,274	40,113	122,117	76,730
Research and development	31,630	18,963	55,505	36,578
General and administrative	30,261	8,477	42,122	15,254
Total operating expenses	127,165	67,553	219,744	128,562
Loss from operations	(50,639)	(30,427)	(76,415)	(63,541)
Interest expense	(164)	(236)	(165)	(428)
Other expense	(451)	(1,852)	(56)	(2,042)
Loss before provision for income taxes	(51,254)	(32,515)	(76,636)	(66,011)
Provision for income taxes	(635)	(362)	(1,230)	(483)
Net loss	$ (51,889)	$ (32,877)	$ (77,866)	$ (66,494)
Net loss per share attributable to Class A and Class B common stockholders, basic and diluted	$ (0.40)	$ (0.75)	$ (0.87)	$ (1.52)
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic and diluted	130,091	44,105	89,335	43,864
Subscription
Revenue
Total revenue	$ 97,575	$ 49,161	$ 183,566	$ 88,919
Cost of revenue
Total cost of revenue	24,946	14,604	48,637	29,775
Professional services
Revenue
Total revenue	10,533	6,540	20,619	14,071
Cost of revenue
Total cost of revenue	$ 6,636	$ 3,971	$ 12,219	$ 8,194