CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Income Statement [Abstract]
Revenue	$ 291,981	$ 242,183	$ 568,638	$ 471,212
Cost of revenue	81,563	60,474	159,528	117,006
Gross profit	210,418	181,709	409,110	354,206
Operating expenses:
Research and development	96,882	79,091	192,652	151,344
Sales and marketing	123,545	127,879	255,656	261,760
General and administrative	56,327	51,474	106,824	100,153
Restructuring	24,425	3,883	24,457	9,050
Total operating expenses	301,179	262,327	579,589	522,307
Loss from operations	(90,761)	(80,618)	(170,479)	(168,101)
Interest income, net	6,151	12,196	12,978	24,486
Other income (expense), net	(2,414)	(327)	76	165
Loss before income taxes	(87,024)	(68,749)	(157,425)	(143,450)
Provision for income taxes	6,376	3,270	12,139	136,762
Net loss	$ (93,400)	$ (72,019)	$ (169,564)	$ (280,212)
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (0.27)	$ (0.22)	$ (0.50)	$ (0.85)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.27)	$ (0.22)	$ (0.50)	$ (0.85)
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	341,527,623	330,938,421	339,301,479	329,481,933
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	341,527,623	330,938,421	339,301,479	329,481,933