I quite like Nextcloud with Talk (spreed), but it's a whole cloud suite. Nextcloud is E2EE, and NC Talk does text, voice, and video. The phone apps are nice too. The only problem is connecting more than 2-3 people in a voice/video call can be a bit much, so they recommend a high-performance backend (either a paid service, or annoying to set up yourself). It might be overkill if you don't also use Nextcloud's other applications, but I use a lot of them extensively, especially when feeding CalDav calendars etc into Home Assistant. Friends making an account on your nextcloud is pretty trivial, even for people who aren't technical. I use the VM hooked to dedyn io for outside access, and it was all very easy to set up. I've had it running for about 6 years now, and only had a problem updating for a while, but it was resolved by the community forums.
I quite like Nextcloud with Talk (spreed), but it's a whole cloud suite. Nextcloud is E2EE, and NC Talk does text, voice, and video. The phone apps are nice too. The only problem is connecting more than 2-3 people in a voice/video call can be a bit much, so they recommend a high-performance backend (either a paid service, or annoying to set up yourself). It might be overkill if you don't also use Nextcloud's other applications, but I use a lot of them extensively, especially when feeding CalDav calendars etc into Home Assistant. Friends making an account on your nextcloud is pretty trivial, even for people who aren't technical. I use the VM hooked to dedyn io for outside access, and it was all very easy to set up. I've had it running for about 6 years now, and only had a problem updating for a while, but it was resolved by the community forums.