CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Income Statement [Abstract]
Revenue	$ 229,029	$ 186,355
Cost of revenue	56,532	50,137
Gross profit	172,497	136,218
Operating expenses:
Research and development	72,253	58,321
Sales and marketing	133,881	115,830
General and administrative	48,679	42,667
Restructuring (Note 8)	5,167	0
Total operating expenses	259,980	216,818
Loss from operations	(87,483)	(80,600)
Interest income, net	12,290	12,046
Other income (expense), net	492	(39)
Loss before income taxes	(74,701)	(68,593)
Provision for income taxes	133,492	1,512
Net loss	$ (208,193)	$ (70,105)
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (0.63)	$ (0.23)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.63)	$ (0.23)
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	327,976,349	309,547,693
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	327,976,349	309,547,693