CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Revenue
Total revenue	$ 1,300,201	$ 835,424	$ 586,067
Cost of revenue
Total cost of revenue	396,405	217,681	159,382
Gross profit	903,796	617,743	426,685
Operating expenses
Research and development	469,259	222,826	159,269
Sales and marketing	770,326	427,350	340,356
General and administrative	431,314	171,726	112,892
Total operating expenses	1,670,899	821,902	612,517
Operating loss	(767,103)	(204,159)	(185,832)
Interest expense	(92,182)	(72,660)	(27,017)
Interest income and other, net	9,768	12,891	17,089
Loss on early extinguishment and conversion of debt	(179)	(2,263)	(14,572)
Interest and other, net	(82,593)	(62,032)	(24,500)
Loss before provision for (benefit from) income taxes	(849,696)	(266,191)	(210,332)
Provision for (benefit from) income taxes	(1,285)	141	(1,419)
Net loss	$ (848,411)	$ (266,332)	$ (208,913)
Net loss per share, basic (in dollars per share)	$ (5.73)	$ (2.09)	$ (1.78)
Net loss per share, diluted (in dollars per share)	$ (5.73)	$ (2.09)	$ (1.78)
Weighted-average shares used to compute net loss per share, basic (in shares)	148,036	127,212	117,221
Weighted-average shares used to compute net loss per share, diluted (in shares)	148,036	127,212	117,221
Subscription
Revenue
Total revenue	$ 1,249,210	$ 796,613	$ 552,688
Cost of revenue
Total cost of revenue	329,131	170,095	116,445
Professional services and other
Revenue
Total revenue	50,991	38,811	33,379
Cost of revenue
Total cost of revenue	$ 67,274	$ 47,586	$ 42,937