Kaillera is middleware designed to aid networked multiplayer play for emulators.

Later in early 2006, rights and source code of Kaillera were sold to a private online gaming advertising company called TC.

[citation needed] On 17 June 2006, Christophe Thibault himself publicly confirmed the sale of Kaillera and also announced that TC.

On 4 November 2007, it was announced that due to unforeseen "bugs" the imminent release would be postponed for a time.

Etai Hugi an Israeli developer purchased Kaillera from Christophe Thibault in 2006.

Once a game starts, the server is also responsible for scheduling and mix matching data sent by emulators in a manner befitting user's ping and connection configuration.