CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Income Statement [Abstract]
Revenues	$ 790,806	$ 723,876	$ 652,504
Cost of revenues	86,759	77,193	64,524
Gross profit	704,047	646,683	587,980
Operating expenses:
Research and development	301,496	341,467	324,688
Sales and marketing	406,952	419,950	391,955
General and administrative	192,930	152,001	141,334
Total operating expenses	901,378	913,418	857,977
Loss from operations	(197,331)	(266,735)	(269,997)
Interest income and other income (expense), net	16,312	19,647	20,624
Interest expense	(3,148)	(3,683)	(3,952)
Loss before provision for income taxes	(184,167)	(250,771)	(253,325)
Provision for income taxes	4,857	4,765	3,705
Net loss	$ (189,024)	$ (255,536)	$ (257,030)
Net loss per share:
Basic (in usd per share)	$ (0.80)	$ (1.11)	$ (1.17)
Diluted (in usd per share)	$ (0.80)	$ (1.11)	$ (1.17)
Weighted-average shares used in calculating net loss per share:
Basic (in shares)	236,823	229,472	220,406
Diluted (in shares)	236,823	229,472	220,406