Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated deficit
Temporary equity, beginning balance (in shares) at Jan. 31, 2023	74,182,559
Temporary equity, beginning balance at Jan. 31, 2023	$ 714,713
Temporary equity, ending balance (in shares) at Oct. 31, 2023	74,182,559
Temporary equity, ending balance at Oct. 31, 2023	$ 714,713
Beginning balance, shares (in shares) at Jan. 31, 2023		59,878,717
Beginning balance at Jan. 31, 2023	(1,087,329)	$ 1	$ 242,326	$ (1,301)	$ (1,328,355)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock option (in shares)		833,684
Issuance of common stock upon exercise of stock options	3,081		3,081
Issuance of common stock for business acquisition (in shares)		500,000
Issuance of common stock for business acquisition	14,070		14,070
Stock-based compensation	2,284		2,284
Other comprehensive income (loss)	38			38
Net loss	(256,661)				(256,661)
Ending balance, shares (in shares) at Oct. 31, 2023		61,212,401
Ending balance at Oct. 31, 2023	$ (1,324,517)	$ 1	261,761	(1,263)	(1,585,016)
Temporary equity, beginning balance (in shares) at Jul. 31, 2023	74,182,559
Temporary equity, beginning balance at Jul. 31, 2023	$ 714,713
Temporary equity, ending balance (in shares) at Oct. 31, 2023	74,182,559
Temporary equity, ending balance at Oct. 31, 2023	$ 714,713
Beginning balance, shares (in shares) at Jul. 31, 2023		60,552,375
Beginning balance at Jul. 31, 2023	(1,253,228)	$ 1	245,909	(389)	(1,498,749)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock option (in shares)		160,026
Issuance of common stock upon exercise of stock options	1,130		1,130
Issuance of common stock for business acquisition (in shares)		500,000
Issuance of common stock for business acquisition	14,070		14,070
Stock-based compensation	652		652
Other comprehensive income (loss)	(874)			(874)
Net loss	(86,267)				(86,267)
Ending balance, shares (in shares) at Oct. 31, 2023		61,212,401
Ending balance at Oct. 31, 2023	$ (1,324,517)	$ 1	261,761	(1,263)	(1,585,016)
Temporary equity, beginning balance (in shares) at Jan. 31, 2024	74,182,559
Temporary equity, beginning balance at Jan. 31, 2024	$ 714,713
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)	(74,182,559)
Conversion of redeemable convertible preferred stock and founder stock to common stock upon initial public offering	$ (714,713)
Beginning balance, shares (in shares) at Jan. 31, 2024		61,262,729
Beginning balance at Jan. 31, 2024	$ (1,419,257)	$ 1	265,494	(2,239)	(1,682,513)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock option (in shares)	1,168,397	1,168,397
Issuance of common stock upon exercise of stock options	$ 6,595		6,595
Issuance of common stock upon settlement of restricted stock awards and restricted stock units (in shares)		21,201,971
Issuance of common stock upon settlement of restricted stock units	(432,512)		(432,512)
Issuance of common stock under employee stock purchase plan (in shares)		406,769
Issuance of common stock under employee stock purchase plan	11,064		11,064
Conversion of redeemable convertible preferred stock and founder stock to common stock upon initial public offering (in shares)		74,182,559
Conversion of redeemable convertible preferred stock and founder stock to common stock upon initial public offering	714,713	$ 2	714,711
Issuance of common stock upon initial public offering and underwriters' exercise of over-allotment option, net of underwriting discounts and commissions, and offering costs (in shares)		26,972,252
Issuance of common stock upon initial public offering and underwriters' exercise of over-allotment option, net of underwriting discounts and commissions, and offering costs	805,135	$ 1	805,134
Stock-based compensation	831,683		831,683
Other comprehensive income (loss)	1,423			1,423
Net loss	(1,039,931)				(1,039,931)
Ending balance, shares (in shares) at Oct. 31, 2024		185,194,677
Ending balance at Oct. 31, 2024	(521,087)	$ 4	2,202,169	(816)	(2,722,444)
Beginning balance, shares (in shares) at Jul. 31, 2024		181,422,818
Beginning balance at Jul. 31, 2024	(499,294)	$ 4	2,093,874	(1,638)	(2,591,534)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock option (in shares)		487,997
Issuance of common stock upon exercise of stock options	2,877		2,877
Issuance of common stock upon settlement of restricted stock awards and restricted stock units (in shares)		2,877,093
Issuance of common stock under employee stock purchase plan (in shares)		406,769
Issuance of common stock under employee stock purchase plan	11,064		11,064
Stock-based compensation	94,354		94,354
Other comprehensive income (loss)	822			822
Net loss	(130,910)				(130,910)
Ending balance, shares (in shares) at Oct. 31, 2024		185,194,677
Ending balance at Oct. 31, 2024	$ (521,087)	$ 4	$ 2,202,169	$ (816)	$ (2,722,444)