Thunderbird
Thunderbird is a free, open-source email and calendar app for Windows, macOS and Linux. The official repository for the Thunderbird desktop email client. It has 184 GitHub stars and is released under the MPL-2.0 license, and people use it instead of Microsoft Outlook.
github.com/thunderbird/thunderbird-desktop (opens in a new tab)
- Official
- Linux
- macOS
- Windows
- Email & calendar
- Actively maintained
About Thunderbird
We also have documentation from this repository in a rendered version at Thunderbird Source Tree Documentation. In order to be able to build Thunderbird - you will need the Firefox repository as well as the Thunderbird repository (where this README lives). Check out our Getting Started documentation for instructions on how and where to get the source code.
Replaces
Commercial software people commonly use Thunderbird instead of.
- Microsoft Outlook
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What is Thunderbird?
Thunderbird is a free, open-source email and calendar app for Windows, macOS and Linux. The official repository for the Thunderbird desktop email client. It has 184 GitHub stars and is released under the MPL-2.0 license, and people use it instead of Microsoft Outlook.
Is Thunderbird free and open source?
Yes. Thunderbird's source code is public on GitHub under the MPL-2.0 license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.
How do I install Thunderbird?
Download it from the repository or build it from source by following the README on GitHub.
Can Thunderbird replace Microsoft Outlook?
Thunderbird is commonly used as a free alternative to Microsoft Outlook. Features differ, so check that it opens the file formats and covers the workflows you rely on before switching.