Delta Chat
Verified working Sep 19, 2026
Encrypted chat that works over email-compatible servers.
Delta Chat is an open-source messaging app that uses email-style infrastructure instead of a single central chat network. It supports encrypted conversations, multiple profiles, and use across multiple devices, with optional chatmail relays for simpler setup.
Why it stands out
- Uses existing email-compatible infrastructure rather than locking users into one provider’s network.
- Offers a chat-style experience while remaining interoperable with email systems.
- Open-source project with apps across major phone and desktop platforms.
- Multi-profile support makes it practical for separating identities or contexts in one app.
Good to know
- Encryption and chat features work best when participants use Delta Chat-compatible clients.
- Using ordinary email providers may involve provider-specific limits, filtering, or reliability quirks.
- The decentralized model can be less familiar than phone-number-based messengers for new users.
Photos
Privacy-conscious teams, activists, and families can use it for secure messaging without joining a closed platform. Replace a conventional chat app while keeping compatibility with email-based infrastructure. Set up separate profiles for personal, work, or project-specific conversations. Use the same account across phone and desktop devices.
End-to-end encrypted messaging, decentralized server model, chatmail relay signup, multi-profile support, multi-device syncing, mobile and desktop apps, and open-source codebase.
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