Conversant (known as ValueClick before 2014) is an online advertising company. It provides online advertising campaigns and programs for advertisers and advertising agency customers in the United States and internationally. The company was founded by Brian Coryat in 1998 and is based in Chicago, Illinois. Conversant’s customers include advertisers, advertising agencies, and traffic distribution partners. In February 2015, the company was named number three on the Top 20 Ad Networks/Buy Side Networks by comScore.