CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Apr. 30, 2022	Apr. 30, 2021
Income Statement [Abstract]
Revenue		$ 422,371	$ 228,914
Cost of revenue		147,930	97,346
Gross profit		274,441	131,568
Operating expenses:
Sales and marketing		243,912	166,804
Research and development		150,798	109,796
General and administrative		68,497	60,563
Total operating expenses		463,207	337,163
Operating loss		(188,766)	(205,595)
Interest income		4,759	2,612
Other expense, net		(8,481)	(488)
Loss before income taxes		(192,488)	(203,471)
Benefit from income taxes		(26,694)	(251)
Net loss		$ (165,794)	$ (203,220)
Net loss per share attributable to Class A common stockholders - basic (in dollars per share)	[1]	$ (0.53)	$ (0.70)
Net loss per share attributable to Class A common stockholders - diluted (in dollars per share)	[1]	$ (0.53)	$ (0.70)
Weighted-average shares used in computing net loss per share attributable to Class A common stockholders - basic (in shares)	[1]	314,361	291,386
Weighted-average shares used in computing net loss per share attributable to Class A common stockholders - diluted (in shares)	[1]	314,361	291,386

[1] On March 1, 2021, all shares of the Company’s then-outstanding Class B common stock were automatically converted into the same number of shares of Class A common stock, pursuant to the terms of the Company’s amended and restated certificate of incorporation. No additional shares of Class B common stock will be issued following such conversion. See Note 10 for further details.