Cost / License
- Freemium
- Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- PHP
- Cloudron




A list of implementations of the ActivityPub protocol.
If you know of an implementation that is missing or if you would like to see an edit to this list please reach out to me via Mastodon/AP: https://jonleibowitz.social/@jon
*** UPDATE 2023 *** This list is woefully out of date and needs major revision. Please bear with me as I look it over and thoughtfully curate the latest state of AP implementations. Or make your own up to date list - that'd be cool too.




Bridgy pulls comments, likes, and reshares on social networks back to your web site. You can also use it to post to social networks - or comment, like, reshare, or even RSVP - from your own web site.

dokieli is a decentralized article authoring, annotation, and social notification tool which works from a Web browser. While it is a general purpose tooling to write articles, it is fully compliant with the Linked Research initiative and principles, and provides features and...
ForgeFed (formerly GitPub) is a decentralized federation protocol based on the W3C's ActivityPub, which extends ActivityStream 2.0. It provides a server to server API for pull request, forking and subscription of repositories provided by Git web services (services like...
Decentralized, open source music streaming; self-hosted, browse by artist, genre; Android, iOS app compatibility. Enjoy unlimited streaming.




Hubzilla is a powerful platform for creating interconnected based websites featuring a decentralised identity, communications, and permissions framework built using common webserver technology. Hubzilla is very suitable for communities (of any size).




no-nonsense activitypub implementation
ActivityPub server designed to use constructions which provide functional security and resilience.
A social network for learners to share reviews on learning resources like books, courses, apps, podcasts, newsletters, livestreams etc. Open-source and ActivityPub compliant.

Lemmy is similar to sites like Reddit, Lobste.rs, or Hacker News: you subscribe to forums you're interested in, post links and discussions, then vote, and comment on them. Behind the scenes, it is very different; anyone can easily run a server, and all these servers are...



Federated and open-source social network with no ads, 500-character limit, custom emojis, and content warnings, emphasizing privacy and personal interaction.












From a friends and familiy birthday party to a march for climate change, today, our gatherings are trapped in the tech giants' platforms. How to get organized, how to click on “I join” without providing intimate data on Facebook or locking yourself in MeetUp?




On-premises file sync, universal access, integrated collaboration, real-time communication with privacy and data control focus.




PeerTube is a free, decentralized and federated video platform developed as an alternative to other platforms that centralize our data and attention, such as YouTube, Dailymotion or Vimeo. But one organization hosting PeerTube alone may not have enough money to pay for bandwidth...




Pixelfed is an image sharing platform with focus on Privacy, Safety and Security, an ethical alternative to centralized platforms like Instagram.




Pleroma is a free, federated social networking server built on open protocols. It is compatible with GNU Social, Mastodon, and many other ActivityPub and OStatus implementations.




Pump.io is not yet an implementation of ActivityPub, but support may be coming in the future: https://github.com/pump-io/pump.io/issues/1241
Decentralized social network on the fediverse. Usable for both #microblogging and full length #blog posts. Editing both content and replies is supported.

Write.as lets you write and publish text instantly. Write a note for yourself to read later. Create a standalone article you can quickly broadcast on social media — or publish a full blog.




Fedilab is a multifunctional Android client to access the distributed Fediverse, consisting of microblogging, photo sharing and video hosting.














Lightweight Android client for decentralized social networking, featuring material design, support for photo, video, emoji, lists, drafts, notifications, multiple themes and timelines.



Amaroq is a lightweight universal client for any Mastodon instance! Simply enter the instance you belong to, log in, and enjoy the all the wonders of the federated social network from your phone.



GON is a Smooth and Confy Client App for Mastodon. You can use for any instance and Easily Switch them. Login to an instance only once makes you easy access between one instance with others.



Mast is a beautiful Mastodon and Pleroma app built with iOS design guidelines in mind. It’s as feature-packed as it is gorgeous. With customisable content and themes, it’s most definitely the perfect choice.







Toot! is a client for the Mastodon social network. It is beautiful, and full of character and whimsy.



A twitter-like web client for Mastodon and Pleroma.
– Twitter like UI, familiar interface. – Able to use on all instances. – No tracking, No ads.

Hyperspace is a free (libre) and open-source client for the Mastodon social network and other fediverse networks written in TypeScript and React. It offers a clean, simple, and fun interface that works with any Mastodon instance.







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