CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Revenue:
Total revenue	$ 226,893	$ 150,771	$ 607,288	$ 419,381
Cost of revenue:
Total cost of revenue	68,464	46,110	183,694	126,091
Gross profit	158,429	104,661	423,594	293,290
Operating expenses:
Sales and marketing	120,360	83,214	327,627	227,417
Research and development	82,256	54,363	219,403	149,250
General and administrative	32,581	25,175	87,309	66,534
Total operating expenses	235,197	162,752	634,339	443,201
Loss from operations	(76,768)	(58,091)	(210,745)	(149,911)
Other income (expense):
Interest income	204	572	534	4,331
Interest expense	(2,597)	(14,093)	(8,811)	(41,838)
Other income (expense), net	117	(113)	(985)	(1,583)
Loss before provision for income taxes	(79,044)	(71,725)	(220,007)	(189,001)
Provision for income taxes	2,249	926	2,411	2,142
Net loss	$ (81,293)	$ (72,651)	$ (222,418)	$ (191,143)
Net loss per share, basic and diluted (in dollars per share)	$ (1.22)	$ (1.22)	$ (3.49)	$ (3.27)
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	66,386,379	59,368,167	63,750,884	58,476,521
Subscription
Revenue:
Total revenue	$ 217,871	$ 144,069	$ 583,822	$ 401,403
Cost of revenue:
Total cost of revenue	57,378	38,642	153,735	103,240
Services
Revenue:
Total revenue	9,022	6,702	23,466	17,978
Cost of revenue:
Total cost of revenue	$ 11,086	$ 7,468	$ 29,959	$ 22,851