v3.25.2
Non-controlling Interests - Summary of Ownership of the LLC Units (Details)
 6 Months Ended
Jun. 30, 2025
shares
Noncontrolling Interest [Line Items]  
Ownership, Balances as of December 31, 2024 236,510,211
Ownership, Vesting of LLC Units 365,295
Ownership, Issuance of LLC Units in connection with equity-based compensation plans 5,143,745
Ownership, Balances as of March 31, 2025 242,019,251
Ownership Percentage, Balances as of December 31, 2024 100.00%
Ownership Percentage, Balances as of March 31, 2025 100.00%
OneStream, Inc.  
Noncontrolling Interest [Line Items]  
Ownership, Balances as of December 31, 2024 173,652,398
Ownership, Exchange of Class C common stock 7,433,218
Ownership, Issuance of LLC Units in connection with equity-based compensation plans 5,143,745
Ownership, Balances as of March 31, 2025 186,229,361
Ownership Percentage, Balances as of December 31, 2024 73.40%
Ownership Percentage, Exchange of Class C common stock 3.10%
Ownership Percentage, Issuance of LLC Units in connection with equity-based compensation plans 0.40%
Ownership Percentage, Balances as of March 31, 2025 76.90%
Continuing Members  
Noncontrolling Interest [Line Items]  
Ownership, Balances as of December 31, 2024 62,857,813 [1]
Ownership, Exchange of Class C common stock (7,433,218) [1]
Ownership, Vesting of LLC Units 365,295 [1]
Ownership, Balances as of March 31, 2025 55,789,890 [1]
Ownership Percentage, Balances as of December 31, 2024 26.60% [1]
Ownership Percentage, Exchange of Class C common stock (3.10%) [1]
Ownership Percentage, Issuance of LLC Units in connection with equity-based compensation plans (0.40%) [1]
Ownership Percentage, Balances as of March 31, 2025 23.10% [1]
[1] Excludes 706,511 and 1,071,806 LLC Units still subject to vesting conditions at June 30, 2025 and December 31, 2024, respectively.