Did people call RCS open source? I’m not a huge follower of the standard, but I don’t think I ever heard that said. In fact, I’ve heard people complain about not just the proprietary encryption but lack of E2E and carrier/Google control.

Its only advantages are that it is better than SMS and supported by the carriers, Google and Apple sometime this year.

It’s a shitty standard but given how shitty SMS is, I’m willing to hold my nose and jump in.

Any tool that calls itself “open source” and uses proprietary encryption that they refuse to let any neutral third party review, should absolutely not be trusted.