XML 8 R1.htm IDEA: XBRL DOCUMENT v3.25.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2025
May 02, 2025
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Entity Registrant Name OneStream, Inc.  
Entity Central Index Key 0001889956  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Title of 12(b) Security Class A common stock, par value $0.0001 per share  
Trading Symbol OS  
Entity File Number 001-42187  
Security Exchange Name NASDAQ  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 87-3199478  
Entity Address, Address Line One 191 N. Chester Street  
Entity Address, City or Town Birmingham  
Entity Address, State or Province MI  
Entity Address, Postal Zip Code 48009  
City Area Code 248  
Local Phone Number 650-1490  
Document Quarterly Report true  
Document Transition Report false  
Class A common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   75,399,202
Class C Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   63,331,215
Class D Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   100,860,889