System1 Group PLC, together with its subsidiaries, provides market research data and insight services in the United States, Latin America, the United Kingdom, rest of Europe, and the Asia Pacific. The company offers Test Your Ad, an ad testing platform that measures consumer emotion to predict short-term sales potential and long-term brand growth; and Test Your Ad Competitive Edge, a subscription-based platform offering emotional effectiveness data and predictive metrics for ads. It also provides Test Your Brand which offers predictive measures to understand current brand health, predict future performance for brands and categories, and improve and inform brand strategy; Test Your Innovation; and bespoke consultancy business. 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.