System1 Group Plc operates as a marketing and brand consultancy company, which provides online market research services. It engages in translating breakthroughs in psychology, behavioural economics and the social sciences into online research and advertising techniques that better understand and predict human behaviour. It operates through the followings segments: US, United Kingdom, Continental Europe, Asia, Brazil and Australia. The company was founded by John V. Kearon on September 19, 2006 and is headquartered in London, the United Kingdom.