Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Income Statement [Abstract]
Revenue	$ 621,154	$ 422,179	$ 204,799
Cost of revenue	179,281	144,177	81,677
Gross profit	441,873	278,002	123,122
Operating expenses:
Research and development	218,176	207,008	136,274
Sales and marketing	397,160	310,848	160,576
General and administrative	198,247	162,722	93,504
Restructuring Charges	6,706	0	0
Total operating expenses	820,289	680,578	390,354
Loss from operations	(378,416)	(402,576)	(267,232)
Interest income	45,880	21,408	202
Interest expense	(1,216)	(1,830)	(787)
Other income (expense), net	918	(1,293)	(2,280)
Loss before income taxes	(332,834)	(384,291)	(270,097)
Provision for (benefit from) income taxes	5,859	(5,613)	1,004
Net loss	$ (338,693)	$ (378,678)	$ (271,101)
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (1.15)	$ (1.36)	$ (1.56)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (1.15)	$ (1.36)	$ (1.56)
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	294,923,536	277,802,861	174,051,203
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	294,923,536	277,802,861	174,051,203