Comment by ronsor

Signal desperately needs "Signal for Business".

Sell a way for businesses to send trusted communications to their customers in sensitive industries - i.e. healthcare would be a big one.

They need both an actual revenue stream, but also that sort of professional messaging can drive adoption which ultimately furthers the Signal mission.

Plus all those things could desperately use good secure messaging systems.

WhatsApp works with your phone number. If you have someone's number, you have their WhatsApp. And since basic text messaging is terrible and RCS still isn't universal, WhatsApp is used.