I have tried it before, it’s neat, but notifications are not reliable since it is peer to peer (both devices need to be online for a connection), a bit like Briar if you’ve used that before. I don’t think it uses the Tor network, so it might be faster than Briar (but also less anonymous?)

I don’t have experience with the jami daemon though, so can’t comment if that solves the peer to peer issue.

I personally like Matrix the best, since you have federation, options for encrypted chats, self-host able with Continuwuity (or Synapse), lots of alternative clients for nearly every OS (even mobile Linux, you have Fractal! FluffyChat also works but it’s definitely oriented towards Android devices)

I like matrix too but am dealing with weird networking issues, across ancient devices. Issues around MatrixRTC, old android devices, using HTTP vs HTTPS and the like are making me not want to live on this world any more.

Well, there’s also IRC and XMPP. Could those work better for older devices? Dunno, but neither are encrypted, so don’t use them for anything sensitive. Signal is good if you want security, they’ve been audited a lot, but they are based in the U.S. which isn’t great.

I’ve also heard of Stoat (formerly Revolt) and Fluxer, both are relatively new, but I would prefer Matrix over both since it’s more easily self-hostable (+ all those different clients to choose from!)

edit: I really didn’t know, but looks like XMPP does support encryption! (and it’s enabled by default on most clients!)