Claws Mail vs Betterbird: catalog facts
 Claws Mail |  Betterbird |
|---|
|
Free Free and open source under the GPL 3.0 or later. |
Free Free and open source, funded by donations. |
|
Windows, macOS, Linux |
Windows, macOS, Linux |
- Opens and searches enormous mail folders without stalling
- Plugins for PGP, spam filtering, RSS and calendars ship with it
|
- 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
|
- Composes plain text by default; HTML mail sending is deliberately limited
- The interface is functional and looks like it was designed in 2004
|
- 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 |
|
Open source |
Open source |
|
License: GPL-3.0-or-later |
License: MPL-2.0 |
|
No account needed |
No account needed |
|
Works offline |
Works offline |
Checked September 21, 2026 | Checked September 20, 2026 |
Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.
Copy comparison link
