Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Income Statement [Abstract]
Revenue	$ 164,165	$ 115,323	$ 446,979	$ 296,083
Cost of revenue	43,765	41,006	131,015	104,406
Gross profit	120,400	74,317	315,964	191,677
Operating expenses:
Research and development	52,306	52,234	161,730	153,104
Sales and marketing	98,249	83,953	295,682	223,594
General and administrative	51,239	42,188	151,425	117,525
Restructuring (Note 11)	74	0	4,329	0
Total operating expenses	201,868	178,375	613,166	494,223
Loss from operations	(81,468)	(104,058)	(297,202)	(302,546)
Interest income	11,877	7,193	33,901	11,502
Interest expense	(1)	(613)	(1,213)	(1,225)
Other income (expense), net	605	(781)	1,655	(645)
Loss before income taxes	(68,987)	(98,259)	(262,859)	(292,914)
Provision (benefit) for income taxes	1,317	599	3,852	(7,916)
Net loss	$ (70,304)	$ (98,858)	$ (266,711)	$ (284,998)
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (0.24)	$ (0.35)	$ (0.91)	$ (1.03)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.24)	$ (0.35)	$ (0.91)	$ (1.03)
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	296,650,848	280,635,022	292,755,742	275,867,765
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	296,650,848	280,635,022	292,755,742	275,867,765