Joint Venture and Equity Method Investment - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2024 USD ($)	Oct. 31, 2023 USD ($)	Oct. 31, 2024 USD ($) lease	Oct. 31, 2023 USD ($)	Jan. 31, 2024 USD ($)
Noncontrolling Interest [Line Items]
Stock-based compensation	$ 48,042	$ 41,334	$ 139,263	$ 120,032
Operating lease, number of leases entered into | lease			3
Operating lease, total lease payments	500		$ 500
Operating lease liabilities	500		500
Short-term lease, cost	0		100
Operating lease expense	100	200	400	500
Equity method investment, impairment					$ 8,900
Equity method investment					$ 0
Loss from equity method investment, net of tax	0	(743)	0	(2,408)
Arch (Meltano Inc.)
Noncontrolling Interest [Line Items]
Loss from equity method investment, net of tax	$ 0	(700)	$ 0	(2,400)
GitLab Information Technology (Hubei) Co., LTD ("JiHu")
Noncontrolling Interest [Line Items]
Ownership percentage	54.00%		54.00%
GitLab Information Technology (Hubei) Co., LTD ("JiHu")
Noncontrolling Interest [Line Items]
Stock-based compensation	$ 1,000	$ 600	$ 800	$ (2,100)
Compensation expense not yet recognized	$ 8,500		$ 8,500
Period for recognition (in years)			3 years 10 months 24 days