System1

Leading responsive acquisition marketing platform with a dual O&O publisher and ad technology model, publicly traded on NYSE

System1 is a publicly traded responsive acquisition marketing platform headquartered in Los Angeles, California. The company operates a portfolio of owned and operated (O&O) websites alongside its RAMP (Responsive Acquisition Marketing Platform) technology, which enables advertisers to acquire customers at scale across search, display, and native advertising channels. System1 leverages first-party data and proprietary technology to match consumer intent signals with relevant advertiser offers, monetizing traffic through partnerships with major search engines including Google and Microsoft. The company has grown significantly through acquisitions, notably acquiring Infospace and Startpage, and going public via a SPAC merger with Trebia Acquisition Corp in January 2022. System1's O&O portfolio includes privacy-focused search engine Startpage, antivirus brand TotalAV, and various content and utility websites that generate high-intent traffic. This dual-sided model — owning both the traffic sources and the monetization infrastructure — differentiates System1 from pure-play ad networks or agencies. In the AdTech ecosystem, System1 occupies a unique position as both a publisher and a technology platform. Its RAMP platform is used internally and offered to third-party publishers to optimize monetization across multiple demand sources. The company competes with performance marketing networks, search monetization platforms, and customer acquisition specialists, while maintaining strategic relationships with major search advertising ecosystems.