Larry founded Janrain in 2002 to address the challenge of managing user identity on the Internet. Prior to Janrain, Larry was a co-founder of Silicon Valley startups Desktop.com, a web-based service, and Four11 Corporation. At Four11 Corporation, Larry led the development of its RocketMail product, one of the first Internet-based email systems. Four11 was acquired by Yahoo in 1997; and its RocketMail product became Yahoo! Mail. Earlier in his career, Larry did software development for Raynet, McDonnell Douglas and A.G. Edwards.