Matt Mullenweg unleashed a no-holds-barred tirade at WP Engine, which has been commercializing WordPress since 2010.

Cease and desist letter claims Matt Mullenweg demanded tens of millions for trademark license WordPress hosting service WP Engine on Monday sent a cease and desist letter to rival Automattic, to force CEO Matthew Mullenweg to stop making allegedly false and misleading claims following a purported trademark license demand.

WP Engine is a major WordPress hosting provider that has been commercializing the open-source WordPress project since 2010. Over their 14-year history, they've raised nearly $300

Mullenweg, who co-created WordPress, last week criticized WP Engine for raking in profits without giving much back to the open source project.

Speaking at the annual WordCamp US conference in Oregon, Automattic CEO and WordPress co-developer Matt Mullenweg branded rival company WP Engine a “cancer to WordPress.” Mullenweg’s harsh comment criticizes WP Engine’s business model,

WP Engine C&D cites Mullenweg's "coercive threats" of "scorched earth nuclear approach" if tens of millions of dollars not paid