ActivityPub AlternativesSocial Networks and other similar apps like ActivityPub

Apps similar to ActivityPub include nostr, which is free and open source. Other options are AT Protocol and muxsocial. In total there are three Mastodon Clients like ActivityPub for self-hosting and the web.

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ActivityPub alternatives page was last updated Jul 9, 2026

nostr
23 likes
The simplest open protocol that is able to create a censorship-resistant global "social" network once and for all.
Cost / License
Free
Open Source
Application typeApplication types
Social Network
Microblog
Origin
International
Platforms
Self-Hosted
Good alternative?Is nostr a good alternative to ActivityPub?
AT Protocol
6 likes
The AT Protocol is a networking technology created to power the next generation of social applications. The initial reference application, bsky.app, provides a global-scale microblogging experience.
Cost / License
Free
Open Source
Origin
United States
Platforms
Self-Hosted
United States
Good alternative?Is AT Protocol a good alternative to ActivityPub?
muxsocial
Like
An open source social media tool that aggregates posts from the top tier open source social media networks: Hashiverse, nostr, Mastodon, and Bluesky.
Cost / License
Free
Open Source (Apache-2.0)
Platforms
Online
Good alternative?Is muxsocial a good alternative to ActivityPub?

3 of 3 ActivityPub alternatives