The history of WordPress is varied but it loosely begins with the Matt Mullenweg and Mike Little's Fork of B2/cafelog (b2 or cafelog). By 27 May 2003, WordPress- a name suggested by Matt's friend Christine Selleck Tremoulet, had been installed on approximately 2 000 blogs. Since its release, WordPress has taken over Content Management Systems with its ease of use and active development of features by contributing programmers from all over the world.

As of January this year, WordPress was used by almost 60% of all the websites whose content management system we know of; equating to 27.5% of the top ten million websites. This number is up from 23,3% of the top ten million websites just two years ago in the same period.

Michael Valdrighi who wrote it in PHP for its use with MySQL is now a contributing developer to WordPress.

By October 2009, the Open Source CMS MarketShare Report concluded that WordPress had the strongest brand of all CMS available on open source.