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DeltaTouchDelta Chat
Free

Free and open source under GPL-3.0-only.

 Free

Free and open source under the GPL 3.0. Free chatmail relays are provided, or use any…

Linux Windows, macOS, Linux, Android, iOS
  • Decentralized messaging
  • Compatible with official Delta Chat clients
  • Works with any email account, or with a provided chatmail relay
  • Reaches people who do not use Delta Chat at all
  • Linux distribution is available through Flathub.
  • Encryption only applies when the other side supports Autocrypt
  • Email metadata such as subject and timing is visible to mail servers
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0-only License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.