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Document And Entity Information
Nov. 06, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 06, 2025
Entity Registrant Name OneStream, Inc.
Entity Central Index Key 0001889956
Entity Emerging Growth Company true
Entity File Number 001-42187
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
Entity Information, Former Legal or Registered Name Not Applicable
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Ex Transition Period false
Title of 12(b) Security Class A common stock, par value $0.0001 per share
Trading Symbol OS
Security Exchange Name NASDAQ