2.51+ releases are rolling into stores: Video/Audio Calls and Channels are not experimental but part of the default feature set now 💫
Calls and channels are always end-to-end encrypted, and only you and your contacts know each other's identity and metadata (avatars, names, keys etc.)
For calls, Delta uses a minimal Rust WebRTC turn server https://github.com/chatmail/chatmail-turn#turn-server-for-chatmail-relays running on hundreds of relays worldwide. It helps to establish P2P media streams, or for relaying traffic if P2P connections fail.






