Thunderbird
Free email, calendar and contacts app that keeps all your accounts in one place.
About Thunderbird
Thunderbird manages several email accounts, calendars and address books in one application, with strong spam filtering and encryption support.
Requirements & licence
| Runs on | Windows, macOS, Linux, Android |
|---|---|
| Internet | Needs internet |
| Licence | Open source — MPL-2.0 |
| Source code | Source code is available |
| Distribution | Official publisher download |
| Last updated | 2 Oct 2026 |
| Support | Community or self-service Community forums and documentation on the official website. |
| Security | Download is served from the publisher's official website. |
Downloads
Learn Thunderbird
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Publisher
Team behind Thunderbird, the free email, calendar and contacts application.
Featured in: Best free tools for small businesses, Open-source business software
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