Delta Chat is a decentralized and secure messenger app
💬 Reliable instant messaging with multi-profile and multi-device support
⚡️ Sign up to secure fast chatmail servers or use classic e-mail servers
🥳 Interactive web apps in chats for gaming and collaboration
🔒 Audited end-to-end encryption safe against network and server attacks
👉 FOSS software, built on Internet Standards, avoiding xkcd927 :)
Available on mobile and desktop.