For now, Matrix[0] with the Riot IM app[1]. Also the Wire app[2] for people who wish to use something simpler. I also want to explore Tox[3] sometime soon. All

For now, Matrix[0] with the Riot IM app[1]. Also the Wire app[2] for people who wish to use something simpler. I also want to explore Tox[3] sometime soon. All of these support encrypted communication. Running your own Matrix server isn't so hard. Federated identities allow you to message other users across other Matrix servers. Riot IM is probably the most widespread GUI for Matrix. Works well on both my Android and from Google Chrome. Encrypted voice calls included. Bridges exist to connect it to external services, like IRC. Purism also is working on using Matrix as the basis for secure communication in their upcoming Librem 5 phone. Wire has no bridges and is more self-contained. It works primarily as a mobile app & has the ability to use your phone's contacts to discover other people who have also set it up. Like Matrix, encrypted voice calls are a feature. Wire is currently centralized, but decentralization is on their road map. The software is noteworthy because it is written in both Rust and Haskell. Tox I just discovered today - it is used by at least one developer of MenuetOS. It's a P2P chat app that affords privacy, confidentiality, and anonymity. Cool thread. I hope some interesting answers come up here. [0] https://matrix.org/ https://matrix.org/ [1] https://riot.im/ https://riot.im/ [2] https://wire.com/en/ https://wire.com/en/ [3] https://tox.chat/ https://tox.chat/