this post was submitted on 24 Feb 2025
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Scientists move to Bluesky, transitioning away from X and Meta platforms (www.dailyuw.com)
submitted 9 hours ago by Sunshine@lemmy.ca to c/technology@lemmy.world
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[–] dan@upvote.au 1 points 4 hours ago* (last edited 4 hours ago)

Why is ActivityPub "the" Fediverse? "Fediverse" is very broad and encompasses multiple protocols, a lot of which predate ActivityPub becoming commonplace.

The original Fediverse apps are still around and don't use ActivityPub. For example, StatusNet / GNU Social use OStatus and Identica uses Activity Streams / ActivityPump (which was the protocol before ActivityPub). diaspora (if it's still around) used its own protocol too.

Some of the older apps have adapted to use ActivityPub, while some of them still exist in their own separate part of the Fediverse.