Comment by jeroenhd
13 hours ago
They don't (https://www.twilio.com/en-us/messaging/channels/rcs, https://www.cm.com/rcs/, https://www.linkmobility.com/en-gb/channels/rcs, https://gatewayapi.com/rcs/, https://www.productsupport.esendex.com/what-is-rcs-messaging..., the list goes on).
Google makes RCS servers for carriers, host RCS themselves for carriers without RCS servers, and builds the most used RCS client app, so it makes sense that they're in the RCS monetization market as well, but you don't need to use them.
Google's pricing being displayed upfront while most others are listed as "contact us" will make Google much more attractive to small apps, of course.
Twilio, Bandwidth etc. are gatekept by Google and are basically just a middleman reselling Google's product.
Every single customer on the planet reachable via "RCS for Business" is through Google's servers and the Google Messages app.