You might want to check out matrix.org. It's its own protocol, so there is no "universal client" like pidgin. However you can easily host a homeserver and "brid

You might want to check out matrix.org. It's its own protocol, so there is no "universal client" like pidgin. However you can easily host a homeserver and "bridge" a lot of protocols. Personally I only have tried telegram, and it works quite well for what it is. Since all the modern chat apps are not open protocols, the bridges usually work over some kind of limited bot APIs.