DoubleClick is a subsidiary of Google which develops and provides Internet ad serving services. Its clients include agencies, marketers (Universal McCann Interactive, AKQA etc. ) and publishers who serve customers like Microsoft, General Motors, Coca-Cola, Motorola, L’Oréal, Palm, Inc. , Apple Inc. , Visa USA, Nike, Carlsberg among others. DoubleClick’s headquarters is in New York City, United States. DoubleClick was founded in 1995 by Kevin O’Connor and Dwight Merriman.