SimpleX has the best privacy, because of removing metadata.
Signal comes close, and has many more users. Probably some of your friends already use it.
If you want something similar to Telegram/Discord/Slack, then Element (Matrix) is what you’re looking for.
All of the above are E2EE.
NewPipe SponsorBlock
https://pastebin.com/gxfm3J7b
SimpleX has the best privacy, because of removing metadata.
Signal comes close, and has many more users. Probably some of your friends already use it.
If you want something similar to Telegram/Discord/Slack, then Element (Matrix) is what you’re looking for.
All of the above are E2EE.