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The Bat!Betterbird
Paid

Commercial software from Ritlabs; prices are not listed on the product page.

 Free

Free and open source, funded by donations.

Windows Windows, macOS, Linux
  • Optional encryption of the local message base
  • Blocks tracking pixels and malicious code in mail
  • Fixes and features Thunderbird has not shipped, listed openly in a comparison table
  • Installs next to Thunderbird and runs on the same profile, so switching back is trivial
  • Windows only
  • Commercial license required
  • A small volunteer project riding on someone else’s release train
  • The Mac build ships in English only and needs a language pack for anything else
Downloadable app Downloadable app
Closed source Open source
License not stated License: MPL-2.0
No account needed No account needed
Works offline Works offline

Checked September 23, 2026

Checked September 20, 2026

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