Yes. On a mobile. We might have a different interpretations of the GP's requirements. Given that they replaced Lync/Skype for Business™ I assume they ideally w

Yes. On a mobile. We might have a different interpretations of the GP's requirements. Given that they replaced Lync/Skype for Business™ I assume they ideally want a comparable offering: Voice and chat for a number of platforms. Signal would give you voice on mobiles only and chat on mobiles only, ignoring the Chrome App beta thing. I might be entirely wrong, but I assumed that the GP chose Telegram for now due to the multi-platform support (chat on all platforms, replacing Lync/Skype in that regard completely). If that is correct, moving to Signal would be a trade-off, exchanging multi-platform support for voice calls. It's not a solution, it's a different subset of Lync's/Skype's feature set