Joint Venture - Schedule of Intercompany Eliminations (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024	Jan. 31, 2025
Noncontrolling Interest [Line Items]
Revenue		$ 244,353	$ 196,047	$ 694,822	$ 547,818
Cost of revenue		32,221	22,125	85,761	62,271
Gross profit		212,132	173,922	609,061	485,547
Sales and marketing		104,974	95,340	322,144	285,542
Total operating expenses		224,488	202,654	674,378	608,924
Loss from operations		(12,356)	(28,732)	(65,317)	(123,377)
Interest income		11,704	12,586	34,077	37,443
Other income (expense), net		(6,334)	4,799	(17,216)	5,170
Provision for (benefit from) income taxes		1,811	(39,152)	6,595	(65,330)
Net Income (loss)		(8,797)	27,805	(55,051)	(15,434)
Net loss attributable to noncontrolling interest		(521)	(1,298)	(1,692)	(2,216)
Cash and cash equivalents	[1]	224,231		224,231		$ 227,649
Property and equipment, net	[1]	10,193		10,193		4,013
Total assets	[1]	1,570,839		1,570,839		1,399,263
Total liabilities	[1]	602,842		602,842		577,957
Variable Interest Entity, Primary Beneficiary
Noncontrolling Interest [Line Items]
Revenue		2,312	1,900	6,371	5,321
Cost of revenue		450	523	1,384	1,542
Gross profit		1,862	1,377	4,987	3,779
Sales and marketing		1,712	1,805	4,684	4,850
Research and development		473	603	749	970
General and administrative		1,334	1,616	4,258	3,362
Total operating expenses		3,519	4,024	9,691	9,182
Loss from operations		(1,657)	(2,647)	(4,704)	(5,403)
Interest income		137	168	457	625
Other income (expense), net		387	(342)	568	(36)
Net loss before income taxes		(1,133)	(2,821)	(3,679)	(4,814)
Provision for (benefit from) income taxes		0	0	3	0
Net Income (loss)		(1,133)	(2,821)	(3,682)	(4,814)
Net loss attributable to noncontrolling interest		(521)	$ (1,298)	(1,692)	$ (2,216)
Cash and cash equivalents		37,386		37,386		37,991
Property and equipment, net		536		536		322
Other assets		3,644		3,644		8,185
Total assets		41,566		41,566		46,498
Total liabilities		$ 7,234		$ 7,234		$ 10,278

[1] (1) As of October 31, 2025 and January 31, 2025, the condensed consolidated balance sheet includes assets of the consolidated variable interest entity, GitLab Information Technology (Hubei) Co., LTD (“JiHu”), of $41.6 million and $46.5 million, respectively, and liabilities of $7.2 million and $10.3 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 10. Joint Venture” for further discussion.