Delta Chat is a decentralized and secure messenger app that is completely compatible with the existing e-mail infrastructure.
So, with Delta Chat you get the ease of well-known messengers with the reach of e-mail.
Some features at a glance:
💬 Reliable instant messaging with multi-profile and multi-device support.
⚡️ Sign-up easily using secure fast chatmail servers. You don’t need a phone number or any private data.
📧 Alternatively, use your existing classic e-mail address to read your inbox as chats.
🎮 Interactive mini-apps in chats for gaming and collaboration.
🔒 Audited end-to-end encryption safe against network and server attacks.
🆓 Fully Open Source/Free Software, built on Internet Standards.