WordPress.com is a blogging platform that is owned and hosted online by Automattic. It is run on WordPress, an open source piece of software used by bloggers.This website provides free blog hosting for registered users and is financially supported via paid upgrades,"VIP" services and advertising. The site opened to beta testers on August 8, 2005 and opened to the public on November 21, 2005. It was initially launched as an invitation-only service, although at one stage, accounts were also available to users of the Flock web browser. As of March 2016 there were over 58 million posts published monthly on the service.