Jupiter Media Metrix was created via the merger of Jupiter Communications and Media Metrix in June 2000.

The Media Metrix part of Jupiter Media Metrix was subsequently sold to comScore

ComScore

comScore is a Internet marketing research company providing marketing data and services to many of the Internet's largest businesses. comScore tracks all internet data on its surveyed computers in order to study online behavior....

. The AdRelevance product was sold to Nielsen

Nielsen

Nielsen , is a Danish patronymic surname, literally meaning son of Niels, Niels being the Danish version of the Greek male given name Νικόλαος, Nikolaos . It is the second most common surname in Denmark, shared by about 5% of the population. It is also used in Norway, although the form Nelsen and...

 NetRatings in 2002 after the FTC

FTC

FTC may refer to:- Organizations :* Federal Trade Commission, a US agency for consumer protection* Ferencvárosi TC, a Hungarian sports club* Financial Training Center Limited, a training institution in Tanzania...

blocked a proposed acquisition of Jupiter Media Metrix by NetRatings, and the Jupiter Research business was sold to INT Media Group in June 2002 for $250,000 plus the assumption of liabilities.