Threw together a comparison of the four decentralized social protocols I know best: IndieWeb, ActivityPub, ATProto, Nostr. Obviously oversimplified, hopefully still useful! Preview below, click through for full table with links.
I tried to focus on how these protocols are currently deployed and used in the real world. For example, identity in ActivityPub is technically URL-based, but in practice the fediverse uses WebFinger user@domain
identifiers more or less universally, so the table reflects that.
Feedback is welcome!

@snarfed.org I was not aware of AT headed towards IETF, is there a source for that?
Hi @snarfed.org I just wanted to let you know that we have a huge matrix community gathering projects about making internet decentralized again. We have official chatrooms from overlay networks to activity-pub, ipfs, nostr, bluesky etc.https://matrix.to/#/#next-internet:codelutin.comMore precisely, this space is dedicated to social networks (including solid, secure scuttlebutt…) https://matrix.to/#/#decentralised-social-networks:codelutin.com
@snarfed.org a โpush vs pullโ explainer in laymanโs terms as it pertains to these protocols would be very interesting.
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Threw together a comparison of the four decentralized social protocols I know best: IndieWeb, ActivityPub, ATProto, Nostr. Obviously oversimplified, hopefully still useful! Preview below, click through for full table with links.I tried to focus on how these protocols are currently deployed and used in the real world. For example, identity in ActivityPub is technically URL-based, but in practice the fediverse uses WebFinger
user@domain
identifiers more or less universally, so the table reflects that.Feedback is welcome!