600
Google Messages just flicked the switch on end-to-end encryption for all RCS and group chats
(chromeunboxed.com)
This is a most excellent place for technology news and articles.
It's the default SMS application on Pixel devices.
On many devices, actually. Over 34 OEMs. https://jibe.google.com/partners/oems/
Even Samsung outside the US uses it by default.