System1 Group PLC, together with its subsidiaries, provides marketing and market research consultancy services. The company offers a range of tools, such as predictive marketing tool that uses the wisdom of the crowd to identify winning concepts; and ad-testing tool that identifies the emotional impact of advertising. It operates in the Americas, the United Kingdom, rest of Europe, and the Asia Pacific. The company was formerly known as BrainJuicer Group PLC and changed its name to System1 Group PLC in March 2017. System1 Group PLC was founded in 1999 and is headquartered in London, the United Kingdom.