Mailbird vs Betterbird: catalog facts
 Mailbird |  Betterbird |
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Paid Paid desktop app, sold as a one-time or subscription license. |
Free Free and open source, funded by donations. |
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Windows, macOS |
Windows, macOS, Linux |
- Unifies multiple email accounts and providers into one inbox
- App integrations reduce the need to switch to separate tools
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- 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
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- Windows and macOS only
- Full feature set requires a paid license
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- 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
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Downloadable app |
Downloadable app |
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Closed source |
Open source |
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License not stated |
License: MPL-2.0 |
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Not stated if an account is needed |
No account needed |
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Not stated if it works offline |
Works offline |
Checked September 22, 2026 | Checked September 20, 2026 |
Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.
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