As an alternative to Signal, I would also recommend Threema.
Mobile only, paid, end-to-end encrypted with in-person verification. Team and infrastructure is based in Switzerland
Mobile only, paid, end-to-end encrypted with in-person verification. Team and infrastructure is based in Switzerland
Accounts not tied to phone number, available on IOS, Android and Windows Phone, perfectly working group chats.
Happy to walk you through it (I'm siim@wire.com).