ArcaneChat is a FLOSS private and secure messenger focused on privacy and friendly user experience.
💬 Reliable instant messaging with multi-profile and multi-device support.
⚡️ Sign-up easily and anonymously, no phone number or any private data required.
🎮 Interactive mini-apps in chats for gaming, shopping lists, productivity and collaboration.
🔒 End-to-end encrypted chats safe against network and server attacks.
ArcaneChat is a Delta Chat client and it is compatible with other Delta Chat clients.
Source code: https://github.com/ArcaneChat/
at the moment there is not “integrated calls” that would cause the phone to ring, but it is planed, but what is available is calls/video-calls invitations in-chat that show a nice “Foo invited you to a video call” message in chat with a button to join but on click it just open the call room in Jitsi Meet app or web browser