Pleroma

Pleroma is a federated microblogging server compatible with Mastodon, GNU social, and the ActivityPub protocol. It is for server operators and communities that need open source software for federated microblogging. ActivityPub compatibility gives it a standards-based role in federation, while support for Mastodon and GNU social lets it work with those microblogging platforms. This makes Pleroma relevant where different compatible servers need to participate in the same federated environment. Its main limitation is its narrow scope: Pleroma is server software for microblogging, not a general-purpose publishing or communication suite. Its compatibility covers ActivityPub, Mastodon, and GNU social, so compatibility with other protocols or platforms should not be assumed. For its intended use, it remains focused on federated microblogging and interoperability with the three named technologies.