Loopt

Loopt, Inc. was an American company based in Mountain View, California, which provided a service for smartphone users to share their location selectively with other people. The service supported all the major mobile operating systems. Loopt's services had more than five million registered users and partnerships with every major U.S. mobile phone carrier. Their applications offered a variety of privacy controls. In addition to its core features, users also had the ability to integrate Loopt with other social networks, including Facebook and Twitter.

The company was founded in 2005 and received initial funding from Y Combinator, and completed Series A and B financing led by Sequoia Capital and New Enterprise Associates. The company's board members included TiVo-founder Mike Ramsay and Greg McAdoo of Sequoia Capital. In March 2012 Loopt agreed to be acquired by Green Dot Corporation for $43.4 million in cash, with $9.8 million of that to be set aside for employee retention.