Kantar is a global data, insights, and consulting company based in London, England. It was founded in 1992 and has approximately 30,000 employees in over 90 countries working in various research disciplines, including brand guidance, brand strategy, social media monitoring, advertising effectiveness, consumer and shopper behavior, and public opinion. Kantar has been majority-owned by Bain Capital Private Equity since July 2019, when WPP sold a 60% stake of the company for $3.1 billion, at a valuation of $4.0 billion.

Kantar provides a unique combination of expertise, advanced analytics, products, and platforms to help organizations succeed through a deeper understanding of people. They offer dedicated solutions based on their deep industry knowledge and help organizations in various industries, including automotive, consumer goods, financial services, healthcare, media, and technology. Kantar also provides online market research services, specializing in using the Internet as a data collection platform to provide research through building and maintaining panels subject to quality and representative sampling standards.

Kantar advises governments, the public sector, NGOs, and NFPs on the delivery of public policy, programs, services, and communications to the public. They have several subsidiaries, including Kantar Profiles (former Lightspeed), which provides online market research services, and Kantar Public, which advises governments and public sector organizations. In May 2022, Kantar announced the sale of Kantar Public businesses to private equity firm Trilantic Europe.

Kantar is the worlds leading marketing data and analytics company. They have a complete, unique, and rounded understanding of how people think, feel, shop, vote, watch, and post worldwide than any other company. Their services are employed by over half of the Fortune 500 companies in 100 countries.