
Publishing platform Ghost enters the Fediverse with ActivityPub integration in public beta
Ghost, an open source platform for modern blog and newsletter publishing, has announced that Ghost Pro users can now access ActivityPub, an open standard for decentralized social networking. This integration — first teased last year — is available as a public beta, allowing any site on Ghost Pro to experiment with ActivityPub. The Ghost team expressed their excitement for user feedback as they venture into the Fediverse.
To assist users, Ghost has provided a detailed guide on how this new feature operates and what to expect in its current form. This integration enables creators and publishers to interact across various platforms, including Ghost, WordPress, Mastodon, Threads, Flipboard, Bluesky, Pixelfed, WriteFreely, and more. As a result, audiences are no longer confined to a single, closed platform.
The ActivityPub feature is still under development, and Ghost encourages early testers to provide feedback as they refine the integration for the upcoming Ghost 6.0 release.

It's not clearly stated on Ghost website but since it doesn't support custom "handles" (i.e. fediverse addresses) yet, the functionality is not available to free self-hosted Ghost instance, but only for paid Ghost-hosted ones. And it'll certainly be a little tricky to setup on self-hosted instances though. Also, it doesn't support blocking users that come from other fediverse services no far.