Mailbird vs Thunderbird: catalog facts
 Mailbird |  Thunderbird |
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Paid Paid desktop app, sold as a one-time or subscription license. |
Free Free forever, funded by donations. |
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Windows, macOS |
Windows, macOS, Linux, Android |
- Unifies multiple email accounts and providers into one inbox
- App integrations reduce the need to switch to separate tools
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- Unified inbox across every account, or each account kept separate, your choice
- Mail, calendar, contacts and tasks in one application rather than four
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- Windows and macOS only
- Full feature set requires a paid license
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- The interface carries a lot of history and can feel dense next to a webmail tab
- Major ESR releases have historically been disruptive for add-ons and settings
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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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