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Automattic has acquired the ActivityPub plugin for WordPress from German developer Matthias Pfefferle, who will be joining the company to continue improving support for federated platforms. Pfefferle, who is also the author of the Webmention plugin, said his new role is to see how Automattic’s products can benefit from open protocols like ActivityPub.
In 2021, Automattic CEO Matt Mullenweg indicated that he would be interested in having Tumblr support the ActivityPub protocol for a greater level of interoperability across networks like Mastodon and others using the same protocol. That is still in the works, but WordPress sites already have this capability through the plugin.
“ActivityPub and a lot of other Open Web Plugins (like the Webmention plugin) were spare time projects, so I was not looking for an acquisition,” Pfefferle said.