At some point social networks had XMTP servers, so it was possible for users to chat across social networks as protocol supports federation. It was even possible to use iMessage as a client.
Sadly, XMTP died once platforms gained enough users. The protocol itself is quite complex because of custom extensions (XEP) and different clients supporting different set of extensions.
I wasn't able to find a good desktop/mobile experience where I looked into self-hosting the XMTP server.
At some point social networks had XMTP servers, so it was possible for users to chat across social networks as protocol supports federation. It was even possible to use iMessage as a client.
Sadly, XMTP died once platforms gained enough users. The protocol itself is quite complex because of custom extensions (XEP) and different clients supporting different set of extensions.
I wasn't able to find a good desktop/mobile experience where I looked into self-hosting the XMTP server.