San Francisco, CA
Founded in 2011, Doximity connects physicians and clinicians to make them more successful and productive. It is the largest medical professional network with over 70 percent of all U.S. physicians as members. The network enables medical professionals to communicate with colleagues and patients, and to share their perspectives on the latest health care trends and research. Doximity is based in San Francisco and was created by the founders of Epocrates and Rock Health.