LiveJournal (often called LJ) is a website on which Internet users can keep a blog. It is also the name of the software that was designed to run it. LiveJournal is different from some other blogging sites, because a user can interact with friends in certain ways that are unique to the website (such as instant messaging in LJ Talk). It is based in San Francisco, California.
LiveJournal was started in 1999 by Brad Fitzpatrick as a way of keeping his high school friends updated on his activities. In January 2005, a blogging software company called Six Apart bought Danga Interactive, the company that was owned by Fitzpatrick, which operates LiveJournal.