Blogger is a blog publishing system. It was created by Pyra Labs, which was bought by Google in 2003. The service itself is located at www.blogger.com, and blogs that do not publish to their own websites are hosted by Google at subdomains of blogspot.com.

WordPress is a blog publishing application and content management system. It was first released in May 2003 by its co-founders Matt Mullenweg and Mike Little as the successor to b2/cafelog. It is powered by PHP and a SQL data backend. As of September 2009, Wordpress is used by 62.8 million websites in the US and 202 million websites worldwide.

LiveJournal (often abbreviated LJ) is a virtual community where Internet users can keep a blog, journal or diary. LiveJournal is also the name of the free and open source server software that was designed to run the LiveJournal virtual community. LiveJournal’s differences from other blogging sites include its WELL-like features of a self-contained community and some social networking features similar to other social networking sites. LiveJournal was started on April 15, 1999 by Brad Fitzpatrick as a way of keeping his high school friends updated on his activities. In January 2005, blogging software company Six Apart purchased Danga Interactive, the company that operated LiveJournal, from Fitzpatrick. On December 2, 2007, Six Apart announced it was selling LiveJournal to SUP, a Russian media company that had been licensing the LiveJournal brand and software for use in Russia. The new owners unveiled a plan to upgrade the service, engage with the LiveJournal community and launch new products for advertisers. This work would be undertaken by the newly formed American-based company LiveJournal, Inc. On January 6, 2009, it was announced that LiveJournal had laid off some of their San Francisco-based employees and moved product development and design functions to Russia. On April 22, 2009, Russian president Dmitry Medvedev opened his own blog on the LiveJournal service.