Sonar was founded by
Ocean City, Maryland, native Brett Martin,[3] and was launched in 2011 at
TechCrunch Disrupt New York.[1][4] Sonar is the fourth business to come out of New York-based mobile incubator K2 Media Labs, with the previous three being Fingerprint, Tracks, and MarketSharing.[5][3]
Sonar has been offline as of September 2013, at which time Martin stated that he was no longer working on the project.[6]