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 private (encrypted) and federated Discord alternative is Movim, which I highly recommend people switch to as soon as possible (the Dev is currently working on discord-like channels with rooms).
For a more complete guide to swapping proprietary apps for safe open-source ones, I suggest referring to this post: https://lemmy.cafe/post/18663514