Kongregate is a social web games website, described by its founder as "video games meets YouTube". The site allows prospective visitors to play games created and submitted by members, in much the same way that YouTube showcases video content created and submitted by its members. The site relies on Adobe's Flash web plugin and the Ruby on Rails web application framework to power the games that it provides.
The site was created in June 2006 by brother and sister Jim and Emily Greer. The site was initially run through a testing phase which lasted until December 2006. During this time, game developers and players tested the site's interface and functionality. In December of the same year, the site was formally opened to the public. The site formally entered the beta testing phase on March 22, 2007.
The Kongregate website itself was designed by Happy Cog Studios.