System1 Group PLC Overview
Pro stress-test →System1 Group is a UK-based marketing decision-making platform provider that delivers marketing and market research consultancy services designed to predict and improve marketing effectiveness. The company serves advertisers globally through proprietary testing platforms and data-driven consultancy services.
Strategic Profile
Pro stress-test →Platform revenues accounted for 93% of total group revenues in Q3 2025, with strongest growth in Predict Your data offerings at +57% as the group builds presence in the substantial ad-testing market. The successful shift to a platform-based operation is having a very positive impact on margins, with System1 achieving a 9M25 gross margin of 88%.
Competitive Landscape
Pro stress-test →System1 Group provides market research data and insight services across the UK, US, Latin America, Europe, and Asia Pacific regions. Primary competitors include larger global market research firms such as WPP, Ipsos, and Kantar, though System1 differentiates through its platform-based technology approach and focus on ad testing and brand tracking services.
Industry Context
System1 Group PLC operates in Market Research, Marketing Analytics & Advertising Technology.
Key facts
Founded: 1999 · Headquarters: London, UK · Revenue: ~£37M (FY25 guidance) · Market cap: £30.45M