Revenue - Schedule of total revenue by geographic areas (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 450,561	$ 368,280
MongoDB Atlas-related
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	313,855	237,756
Other subscription
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	123,041	116,958
Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	13,665	13,566
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	272,093	222,346
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	123,296	105,123
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 55,172	$ 40,811