Mullenweg left CNET in October 2005 to focus on WordPress and related activities full-time, and announced Akismet several days later. Akismet is a distributed effort to stop comment and trackback spam by using the collective input of everyone using the service. In December, he announced Automattic, the company behind WordPress.com and Akismet. Automattic employed people who had contributed to the WordPress project, including lead developer Ryan Boren and WordPress MU creator Donncha Ó Caoimh. An Akismet licensing deal and WordPress bundling was announced with Yahoo! Small Business web hosting about the same time.