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Cover
Jan. 06, 2025
Document Information [Line Items]  
Document Type 8-K
Document Period End Date Jan. 06, 2025
Entity Registrant Name System1, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-39331
Entity Tax Identification Number 92-3978051
Entity Address, Address Line One 4235 Redwood Avenue
Entity Address, City or Town Los Angeles
Entity Address, State or Province CA
Entity Address, Postal Zip Code 90066
City Area Code 310
Local Phone Number 924-6037
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Central Index Key 0001805833
Amendment Flag false
Class A Common Stock, $0.0001 par value per share  
Document Information [Line Items]  
Title of 12(b) Security Class A Common Stock, $0.0001 par value per share
Trading Symbol SST
Security Exchange Name NYSE
Redeemable warrants, each whole warrant exercisable for one Class A Common Stock share at an exercise price of $11.50 per share  
Document Information [Line Items]  
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one Class A Common Stock share at an exercise price of $11.50 per share
Trading Symbol SST.WS
Security Exchange Name NYSE