Software · Internet & communication
Delta Chat
Decentralized private messenger with chat-shared tools and games.
- Completely free
- Windows, macOS, Linux, Android and iOS
- Open source
- No account
Overview
Delta Chat is a messaging program, available on Windows, macOS, Linux, Android and iOS.
Features described in its F-Droid listing and in its Flathub listing: end-to-end encryption.
Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.
Excerpts that establish this information
- “Delta Chat is a decentralized and secure messenger app 💬 Reliable instant messaging with multi-profile and multi-device support ⚡️ Sign up to secure and interoperable chatmail relays 🥳 Interactive ...” — official website, 10 November 2026
- “Audited End-to-End encryption safe against network and server attacks.” — Flathub, 10 November 2026
- “Delta Chat feels like Whatsapp or Telegram but you can also use and regard it as an e-mail app.” — Winget, 10 November 2026
At a glance
Delta Chat is completely free: it is open source software, and every feature is available without paying or subscribing.
Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.
Strengths
- Open source code
- No account needed
- No advertising
- Commercial use allowed
About
Delta Chat is a reliable decentralized instant messenger that is easy and fun to use for friends, family, groups and organizations. Delta Chat is developed by a dedicated FOSS contributor community that jointly releases refinements and new features several times a year, across many stores and platforms world-wide. Features at a glance: 🌐 Anonymous. Instant onboarding without a phone number, e-mail or other private data. 📱 Flexible. Supports multiple chat profiles and is easy to setup on multiple devices. 🧩 Extensible. Add tools like shopping lists, calendars or gaming apps to any chat. 🌧️ Reliable. Works under bad and adversarial network conditions. 🛡️ Secure. Audited End-to-End encryption safe against network and server attacks. 🏠 Sovereign. Can be run with your own e-mail address or server. 📜 FOSS. Fully Open Source/Free Software, built on Internet Standards.
Description from Flathub — AppStream (Flathub)
Sources and checks
- Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
- Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
- Facts collected from F-Droid (credit card, source code, licence, free status, platforms, ads, commercial use, version) —
- Facts collected from Winget (Windows Package Manager) (credit card, account, source code, publisher, licence, free status, platforms, commercial use, version) —
- Facts collected from Homebrew (platforms) —
- Facts collected from Wikidata (licence, platforms) —
- Last technical check: 5 November 2026
- Description from Flathub — AppStream (Flathub)
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