System1 Group PLC, together with its subsidiaries, provides marketing and market research consultancy services. The company offers a range of tools, such as predictive markets tool that uses the wisdom of the crowd to identify winning concepts; and ad-testing tool that identifies efficient and high-return advertising. It operates in the United Kingdom, the United States, Switzerland, Germany, the Netherlands, France, Brazil, Singapore, Australia, and China. 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..