RCS is open (though not a lot of implementations exist). Google invented their own Signal-over-RCS encryption (but are apparently using MLS for group messaging?) but that too is all open.
Theoretically any app van register itself as an RCS client, which I’m sure won’t cause any problems if you install multiple of these apps at the same time.
RCS is still pretty meh as a backing protocol, though, stuck with layers of servers and services because it’s a telco oriented protocol. I don’t understand why Google didn’t simply pick XMPP for their messaging platform instead of trying to push this weird amalgamation of services.
On the other hand XMPP people are still pretty pissed about Google Talk so I don’t think it would’ve made the platform any more open in practice.
RCS is open (though not a lot of implementations exist). Google invented their own Signal-over-RCS encryption (but are apparently using MLS for group messaging?) but that too is all open.
Theoretically any app van register itself as an RCS client, which I’m sure won’t cause any problems if you install multiple of these apps at the same time.
RCS is still pretty meh as a backing protocol, though, stuck with layers of servers and services because it’s a telco oriented protocol. I don’t understand why Google didn’t simply pick XMPP for their messaging platform instead of trying to push this weird amalgamation of services.
On the other hand XMPP people are still pretty pissed about Google Talk so I don’t think it would’ve made the platform any more open in practice.