Implements ActivityPub and you can do Twitter-like messaging and you can define the makimum length of the text. The client API is the same as with Mastodon, so you can use any Mastodon app with it, or even run the Mastodon web frontend.

It is written in Elixir instead of Ruby, so it is much faster than Mastodon. Supports quoting and emoji reactions like Misskey does.