v3.25.2
Cover - shares
 6 Months Ended
Jul. 31, 2025
Aug. 28, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jul. 31, 2025  
Document Transition Report false  
Entity File Number 001-41065  
Entity Registrant Name Braze, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 45-2505271  
Entity Address, Address Line One 63 Madison Building  
Entity Address, Address Line Two 28 East 28th Street,  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10016  
City Area Code 609  
Local Phone Number 964-0585  
Title of 12(b) Security Class A Common Stock, par value $0.0001 per share  
Trading Symbol BRZE  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0001676238  
Current Fiscal Year End Date --01-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Address, Address Line Three Floor 12  
Class A common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   99,079,819
Class B common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   12,187,414