this post was submitted on 28 Feb 2025
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Fediverse

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Is it any service that includes the ability to federate? If so, are Matrix/XMPP/other non-ActivityPub services part of the Fediverse, or does Fediverse really just mean ActivityPub?

The context is wanting to promote a Matrix chat room on discuss.online: #online.discuss:discuss.online (see post). Does it belong in Lemmy communities like this one, [email protected], etc? Or does it not count as part of the Fediverse?

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[–] [email protected] 1 points 3 days ago* (last edited 3 days ago) (1 children)

Matrix is not federated, it has nothing to do with the whole ActivityThing. They are two separate universes. Maybe there are bridges that I don't know of, but essentially they are not interconnected.

[–] [email protected] 11 points 3 days ago (1 children)

It's federated, just not to the ActivityPub universe, right? People have been able to join rooms on discuss.online using their matrix.org accounts, which to me counts as federated.

[–] [email protected] 7 points 3 days ago

Matrix servers can talk to each other, so yes, they are federated. But Matrix is not ActivityPub.