Revenues - Disaggregation of Revenue by Product and Service (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 252,653	$ 152,176	$ 81,227
Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
Subscription—self-managed and SaaS
Disaggregation of Revenue [Line Items]
Total revenue	$ 226,163	$ 132,763	$ 70,367
Subscription—self-managed and SaaS | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	90.00%	87.00%	87.00%
Subscription—self-managed
Disaggregation of Revenue [Line Items]
Total revenue	$ 179,564	$ 114,949	$ 65,420
Subscription—self-managed | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	72.00%	75.00%	81.00%
SaaS
Disaggregation of Revenue [Line Items]
Total revenue	$ 46,599	$ 17,814	$ 4,947
SaaS | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	18.00%	12.00%	6.00%
License—self-managed and other
Disaggregation of Revenue [Line Items]
Total revenue	$ 26,490	$ 19,413	$ 10,860
License—self-managed and other | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	10.00%	13.00%	13.00%
License—self-managed
Disaggregation of Revenue [Line Items]
Total revenue	$ 20,171	$ 14,525	$ 9,879
License—self-managed | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	8.00%	10.00%	12.00%
Professional services and other
Disaggregation of Revenue [Line Items]
Total revenue	$ 6,319	$ 4,888	$ 981
Professional services and other | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	2.00%	3.00%	1.00%