The UK based global market research firm Taylor Nelson Sofres (TNS) is purchasing online measurement firm Compete.

TNS will initially pay $75 million in cash for Compete and depending on revenue performance over the next two years it could pay an additional $75 million.

Compete launched in 2000 and gets its data from its own panel and Internet service providers. The company will continue to operate as a stand-alone company but will merge its clickstream data with TNS.