Niklas Zennstrom and Janus Friis founded which Internet telephone company?
Janus Friis Janus Friis Janus Friis (; born 26 June 1976 in Copenhagen) is a Danish entrepreneur best known for co-founding the file-sharing application Kazaa, and the peer-to-peer telephony application Skype. In September 2005, he and his partner Niklas Zennström sold Skype to eBay for $2.6B. Friis has maintained ownership interest in Skype through Silver Lake Partners, which sold Skype to Microsoft for $8.5 billion, in May 2011. Friis and Zennström also developed Joost - an interactive software application for distributing TV shows and other forms of video content over the Web. The assets of this service were sold to Adconion Media
Janus Friis to leave Tele2. Friis moved into Zennström's small apartment in Amsterdam in January 2000 where they started developing KaZaA, the company responsible for the most popular software for use with the FastTrack file sharing network protocol. Janus Friis and Niklas Zennström developed the FastTrack protocol in 2001. From the success of KaZaA’s peer-to-peer technology the duo co-founded Joltid, a software company developing and marketing peer-to-peer solutions and peer-to-peer traffic optimization technologies to companies. Friis is also co-founder of Altnet, a network that sells commercial music to KaZaA users. Friis founded the online music streaming service Rdio with Zennstroem in 2010.