Ricochet Refresh is what you want.
It's fork of Ricochet (now abandoned) which was an alternative to TorChat.
About Ricochet Refresh
Ricochet was launched in 2014 as a different approach to instant messaging that doesn’t trust anyone in protecting your privacy.
Ricochet Refresh uses the original Ricochet open-source software but has improved on it substantially, such as upgrading its security and making it compatible with Tor Onion Services v3 instead of the older v2.
We believe software like Ricochet is important to protect freedom of expression for whistleblowers, activists, and journalists worldwide.
https://www.ricochetrefresh.net/