I recommend Peer Calls as an alternative. Peer Calls uses peer-to-peer communication similar to Jami. You can check out Peer Calls on Github for more info.
So, in short, the things I really like about it:
Simple to selfhost - Only one Docker container with no dependencies (database, storage, etc.) and you only need to forward HTTP/S traffic.
Lightweight - You get voice and text chat; screen and file sharing. All of it directly P2P.
Private - Selfhosting the signaling server will grant you control over the only step which requires a central server during the WebRTC connection process.
No accounts - Just start using, no accounts are involved.
I recommend Peer Calls as an alternative. Peer Calls uses peer-to-peer communication similar to Jami. You can check out Peer Calls on Github for more info.
So, in short, the things I really like about it: