Jason Calacanis is an American entrepreneur, angel investor, and author best known for his early-stage investments in technology companies such as Uber, Thumbtack, and Robinhood. He founded several media and tech ventures, including Weblogs, Inc., and hosts the popular podcast 'This Week in Startups', where he interviews founders and discusses trends in the startup ecosystem. Calacanis is a prominent figure in Silicon Valley and a frequent commentator on innovation and venture capital.