Mastodon is a free, open-source, federated social network. That means users or communities can manage their own data while interacting if they wish with a wider network of more than 1 million users. Mastodon is part of the "fediverse" of federated social networks and is compatible with the W3C's ActivityPub specification.

Mastodon can be self-hosted or run through managed hosting.

Use cases

Run a classroom social network

Set up a Mastodon instance for students to use privately within a course.

Experiment with community moderation

For either a private or federated instance, assign students to develop and test their own policies around privacy, acceptable use, and more.

How to use it

Replacement for

  • Twitter