Joint Venture and Equity Method Investment - Narrative (Details) $ in Thousands, shares in Millions				1 Months Ended		3 Months Ended			6 Months Ended
	Apr. 04, 2022 USD ($)	Mar. 29, 2022 USD ($)	Jul. 31, 2018 USD ($)	Apr. 30, 2021 USD ($)	Feb. 28, 2021 USD ($) day	Jul. 31, 2022 USD ($)		Jul. 31, 2021 USD ($)	Jul. 31, 2022 USD ($) shares		Jul. 31, 2021 USD ($)	Jan. 31, 2022 USD ($)
Noncontrolling Interest [Line Items]
Stock-based compensation expense						$ 37,747		$ 5,232	$ 55,218		$ 8,663
Contributions received from noncontrolling interests, net of issuance costs									57,673		26,450
Decrease in net assets upon consolidation	$ 9,400
Decrease from deconsolidation									11,342
Carrying value of investment						14,581	[1]		14,581	[1]		$ 0
Loss from equity method investment, net of tax						(816)		$ 0	(1,019)		$ 0
Shares subject to the 2021 ESPP | 2021 Employee Stock Purchase Plan
Noncontrolling Interest [Line Items]
Compensation expense not yet recognized						31,700			$ 31,700
Period for recognition (in years)									1 year 9 months 18 days
Meltano Inc.
Noncontrolling Interest [Line Items]
Equity method investment, cost	17,800
Stake in equity method investment (as a percent)									98.00%
Noncontrolling Interests
Noncontrolling Interest [Line Items]
Stock-based compensation expense						2,755			$ 2,972
Decrease from deconsolidation	11,300								11,342
Accumulated Deficit
Noncontrolling Interest [Line Items]
Decrease from deconsolidation	15,900
JiHu
Noncontrolling Interest [Line Items]
Consideration received on transaction, net of discounts		$ 27,700
Net of issuance costs						22,800			22,800
Stock-based compensation expense						2,800			3,000
Compensation expense not yet recognized						$ 20,600			$ 20,600
Period for recognition (in years)									3 years 8 months 12 days
Meltano Inc.
Noncontrolling Interest [Line Items]
Consideration received on transaction, net of discounts	$ 7,200
Contributions received from noncontrolling interests, net of issuance costs				$ 4,200
Meltano Inc. | Employee stock options
Noncontrolling Interest [Line Items]
Potentially dilutive equity instruments (in shares) | shares									2.6
Meltano Inc. | Preferred Stock
Noncontrolling Interest [Line Items]
Stake in equity method investment (as a percent)									50.00%
Potentially dilutive equity instruments (in shares) | shares									3.1
JiHu
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners		72.00%
Ownership percentage		56.00%
Meltano Inc.
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners				12.00%
Investment in subsidiary			$ 400
Variable Interest Entity, Primary Beneficiary | JiHu
Noncontrolling Interest [Line Items]
Loans payable					$ 2,900
Loan payable, period (in days) | day					10

[1] (1) As of July 31, 2022 and January 31, 2022, the condensed consolidated balance sheet includes assets of the consolidated variable interest entity, GitLab Information Technology (Hubei) Co., LTD (“JiHu”), of $60.9 million and $17.7 million, respectively, and liabilities of $3.6 million and $3.7 million, respectively. The assets of JiHu can be used only to settle obligations of JiHu and creditors of JiHu do not have recourse against the general credit of the Company. Refer to “Note 11. Joint Venture and Equity Method Investment” for further discussion.