Cost / License
- Free
- Open Source (AGPL-3.0)
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Self-Hosted
- Kubernetes
- YunoHost


FoundKey is described as 'Free and open source microblogging server compatible with ActivityPub. It is currently under LIMITED MAINTENANCE and is not well suited for large instances. No more than 20 users per instance are recommended' and is an app in the social & communications category. There are more than 25 alternatives to FoundKey for a variety of platforms, including Web-based, Self-Hosted, Android, iPhone and Android Tablet apps. The best FoundKey alternative is Mastodon, which is both free and Open Source. Other great apps like FoundKey are Bluesky, X, diaspora* and Tumblr.


Sharkey is a Misskey fork following upstream changes when possible, with added features. Like any other ActivityPub software Sharkey can interface with the thousands of servers that form the fediverse, an interconnected social network, working in tandem with software such as...

This is a fork of Pleroma, which is a microblogging server software that can federate (= exchange messages with) other servers that support ActivityPub. What that means is that you can host a server for yourself or your friends and stay in control of your online identity, but...

Iceshrimp is a derivative of Misskey that has been offering practical solutions, enhancements, and improvements since 2023. It is designed to address user needs directly, focusing on delivering straightforward fixes and features that users find valuable.
identi.ca is a free personal web server that implements a distributed social networking service. It is based on pump.io, a free software which make up the distributed social network.







Cato is an X (Twitter) alternative where you can post Meows, get Not So Anonymous Messages, connect with other Catos & grow your online social network.




Stegodon is an SSH-first federated blogging platform. Users connect via SSH to create notes in a terminal interface. Notes federate to the Fediverse via ActivityPub and are available through RSS feeds and a web interface.

While it’s always nice to have more Fediverse software, we have some specific features and goals that we think makes Takahe a great choice of server software:


Ktistec is an ActivityPub server. It is intended for individual users, not communities of users, although support for additional users will be added in the future. It is designed to have few runtime dependencies -- for example, it uses SQLite as its database, instead of...

Calckey is based off of Misskey, a powerful microblogging server on ActivityPub with features such as emoji reactions, a customizable web UI, rich chatting, and much more!