now supports Mastodon

Previously, Keybase only supported the mega-behemoths: Twitter, Facebook, Reddit, Github, and HackerNews. This new protocol change isn’t just for Mastodon; we’re ripping Keybase wide open, so any community can cryptographically connect profiles to Keybase.


Has anyone used the keybase messenger?

Do you mean the messaging part of Keybase on Desktop, or the Keybase app? We used both of them.