Janus Friis ([ˈjæːnus ˈfʁiːˀs]; 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.