Came across this recently, and love to see this on cloudron!
Site address: https://cwtch.im/
Serve install/set up: https://git.openprivacy.ca/cwtch.im/server
What is Cwtch?
Cwtch (/kʊtʃ/ - a Welsh word roughly translating to “a hug that creates a safe place”) is a decentralized, privacy-preserving, multi-party messaging protocol that can be used to build metadata resistant applications.
Decentralized and Open: There is no “Cwtch service” or “Cwtch network”. Participants in Cwtch can host their own safe spaces, or lend their infrastructure to others seeking a safe space. The Cwtch protocol is open, and anyone is free to build bots, services and user interfaces and integrate and interact with Cwtch.
Privacy Preserving: All communication in Cwtch is end-to-end encrypted and takes place over Tor v3 onion services.
Metadata Resistant: Cwtch has been designed such that no information is exchanged or available to anyone without their explicit consent, including on-the-wire messages and protocol metadata.