Kantar is a data, insights and consulting company. It is the world's largest market research company, with offices in 100 countries. Kantar's services include brand research, advertising effectiveness, media research, and public opinion polls. The company was founded in 1992 as the Market Research, Consultancy and Investment Group and was renamed Kantar in 2008. Kantar is part of WPP, a British multinational advertising and public relations company. In 2019, Kantar was sold to Bain Capital for $4 billion.