The fascist noose is tightening the world over thanks to proprietary big tech. We have to escape now while we can to open-source alternatives.

Currently the best self-hostable, private (encrypted) and federated (like lemmy/piefed) alternative is Movim.

It offers 90% of the features of Discord, including group video calls, group texts, and even screensharing with audio (must use a Chromium based browser currently to share the audio). The only feature missing is discord-style rooms, which the dev is currently working on to release as fast as possible.

For a more complete guide to swapping proprietary apps for safe open-source ones, I suggest referring to this post: lemmy.cafe/post/18663514