Sonar (mobile application)

Sonar was a free mobile application which showed the user how they are connected to other individuals in a room via publicly available social media profiles and location information from Foursquare, Twitter, and Facebook.[1][2]


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.[3]

Sonar has been offline as of September 2013, at which time Martin stated that he was no longer working on the project.[5]


  1. ^ Jump up to:ab Tsotsis, Alexia (May 23, 2011). “Sonar Finds You The Most Relevant People In The Room”. TechCrunch. Retrieved July 14, 2011.
  2. ^Wortham, Jenna (June 4, 2011). “Focusing on the Social, Minus the Media”. New York Times. Retrieved July 14, 2011.
  3. ^ Jump up to:ab Boyd Myers, Courtney (May 24, 2011). “Interview with Sonar: The inside story on the hyperlocal, realtime networking app”. The Next Web. Retrieved July 14, 2011.
  4. ^Segall, Laurie (May 31, 2011). “5 hot startups at TechCrunch Disrupt”. CNNMoney. Retrieved July 14, 2011.
  5. ^Ha, Anthony (September 17, 2013). “Yep, Social Discovery Startup Sonar Is Dead (And Its CEO Explains Why)”. TechCrunch. Retrieved July 8, 2014.

Ofer Abarbanel online library

Ofer Abarbanel online library

Ofer Abarbanel online library