Joost ( , like "juiced") is a system for distributing recorded TV shows and other forms of video over the Web using peer-to-peer TV technology, created by Niklas Zennström and Janus Friis (founders of Skype and Kazaa).

Joost began development in 2006. Working under the code name "The Venice Project", Zennström and Friis assembled teams of some 150 software developers in about six cities around the world, including New York, London, Leiden and Toulouse. According to Zennström at a 25 July 2007 press conference about Skype held in Tallinn, Estonia, Joost had signed up more than a million beta testers, and its launch was scheduled for the end of 2007.

The teams are currently in negotiations with FOX networks. It has signed up with Warner Music, Indianapolis Motor Speedway Productions (Indianapolis 500, IndyCar Series) and production company Endemol for the beta.Orlowski, Andrew (January 17, 2007). Joost - the new, new TV thing. The Register In February 2007, Viacom entered into a deal with the company to distribute content from its media properties, including MTV Networks, BET and film studio Paramount Pictures.

Technology

The current version of the software is based on XULRunner and the audio management re-uses the ZAP Media Kit. The peer to peer layer comes from the Joltid company, which also provided the peer to peer layer of Skype. The video playback utilizes the CoreCodec, CoreAVC H.264 video decoder.

Joost soft launched its Widget API

Joost development

As co-owners of Skype, Friis and Zennström received part of a $2.6 billion cash payment when eBay acquired Skype in 2005, which easily covered the development and marketing cost of their Joost venture. Just a week after launching the service, the founders announced that they had raised an additional $45 million. Sequoia Capital, which backed Yahoo, Google and YouTube; Index Ventures, an early investor in Skype; Li Ka-shing, the Hong Kong tycoon; and CBS, the US media group, have all taken “small minority” stakes in the start-up. Viacom is also understood to be among the partners, although the nature of its backing has not been disclosed.

Content distribution

As opposed to streaming technology in which all clients get the feed from the server, P2P TV technology differs in the sense that the servers serve only a handful of clients; each of the clients in turn propagate the stream to more downstream clients and so on. This moves the distribution costs from the channel owner to the user.

The Joost service is ad-supported, with advertising analogous to that shown on traditional TV, according to former CEO Fredrik de Wahl. Joost has 40 advertisers, including Sony Pictures, BMW, and Sprite. Aside from injected video-advertisements, it serves additional interactive advertisements via overlays and short pop-ups that are clickable. As this is visible related to the content shown, it is not a surprise that Joost sends regular data back to ad-servers via port 11208, a fact that is disclosed in legalese to users in the end-user license agreement.