Compare software

ArcaneChatDelta Chat
Free

Free and open source, with no ads, funded by donations.

 Free

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

Android Windows, macOS, Linux, Android, iOS
  • No phone number needed to sign up
  • End-to-end encryption and consent-based contact
  • Works with any email account, or with a provided chatmail relay
  • Reaches people who do not use Delta Chat at all
  • Android only; other platforms must use Delta Chat
  • Maintained mainly by one developer
  • 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 License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 2, 2026

Checked September 21, 2026

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