Free Thunderbird Alternatives

The best free alternative to Thunderbird is Betterbird, which is also Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Thunderbird and loads of them are free so hopefully you can find a suitable replacement. Other interesting free alternatives to Thunderbird are K-9 Mail, Evolution, SeaMonkey and FairEmail.

filter to find the best alternatives

Most Thunderbird alternatives are Email Clients, but you can also narrow the list to Calendar Apps or Contact Managers. Other popular filters are Linux, iPhone, Open Source, Android and EU. You can also filter for EU-based alternatives if you prefer software from the European Union.
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Alternatives
Thunderbird alternatives page was last updated

Alternatives list

  1. Wino Mail icon
     10 likes

    Wino is a lightweight native mail client for Windows 10/11. It is still in active development. Main motivation for this project is to replace Mail & Calendar for Windows with modern Windows design without using web technologies for speed.

    26 Wino Mail alternatives

    Cost / License

    Application type

    Since

    • Since 2023

    Platforms

    • Windows
    Good alternative?
     
  2. Nextcloud Mail icon
     14 likes

    💌 Mail app for Nextcloud.

    46 Nextcloud Mail alternatives

    Cost / License

    Application type

    Since

    • Since 2018

    Platforms

    • Online
    • Self-Hosted
    • Nextcloud
    Good alternative?
     
  3. Mutt icon
     68 likes

    Mutt is a small but very powerful text-based mail client for Unix operating systems. Some of its features are: color support, message threading, MIME support (including RFC2047 support for encoded headers), PGP/MIME (RFC2015), various features to support mailing lists, including...

    Cost / License

    • Free
    • Open Source

    Application type

    Since

    • Since 2009

    Platforms

    • Windows
    • Mac
    • Linux
    • Xfce
    • US flagUnited States
    Mutt screenshot 1
    Good alternative?
     
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    2
  4. Zimbra Desktop icon
     32 likes

    The free Zimbra Desktop client allows you to meld the online and offline worlds – storing and synching your email, calendar, contacts, files and documents in the cloud, yet having them locally accessible when on the road.

    Cost / License

    • Free Personal
    • Proprietary

    Application type

    Since

    • Since 2009

    Platforms

    • Windows
    • Mac
    • Linux
    Good alternative?
     
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    2
  5. aerc icon
     9 likes

    aerc is an email client that runs in your terminal. It's highly efficient and extensible, perfect for the discerning hacker.

    55 aerc alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Since

    • Since 2019

    Platforms

    • Linux
    Good alternative?
     
  6. ElectronMail icon
     24 likes

    ElectronMail is an Electron-based unofficial desktop client for ProtonMail end-to-end encrypted email provider. The app aims to provide enhanced desktop user experience enabling features that are not supported by the official in-browser web clients.

    Cost / License

    Application type

    Since

    • Since 2019

    Platforms

    • Windows
    • Mac
    • Linux
    • Debian
    • Ubuntu
    • Arch Linux
    • Raspberry Pi
    • Fedora
    • Electron
    • Linux Mint
    Good alternative?
     
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    2
  7. Trojitá icon
     17 likes

    Trojitá, is a fast Qt IMAP e-mail client that respects open standards and facilitates modern technologies. Trojitá values vendor-neutrality that IMAP provides and is committed to be as interoperable as possible.

    Cost / License

    • Free
    • Open Source

    Application type

    Since

    • Since 2013

    Alerts

    • Discontinued

    Platforms

    • Windows
    • Linux
    Good alternative?
     
  8. myMail icon
     16 likes

    myMail is the smart email app for managing all your accounts on iOS and Android.

    35 myMail alternatives

    Cost / License

    • Free
    • Proprietary

    Application type

    Since

    • Since 2013

    Platforms

    • iPhone
    • iPad
    Good alternative?
     
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    1
  9. Foxmail icon
     20 likes

    Foxmail is a free POP3 and IMAP4 e-mail client in English and Chinese for Windows systems.

    41 Foxmail alternatives

    Cost / License

    • Free
    • Proprietary

    Application type

    Since

    • Since 2010

    Platforms

    • Windows
    • Mac
    Good alternative?
     
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    1
  10. Flectar Mail icon
     8 likes

    Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 20 MB of RAM.

    Cost / License

    Application type

    Since

    • New

    Platforms

    • Windows
    • Mac
    • Linux
    Good alternative?
     
  11. Shortwave icon
     17 likes

    Shortwave is an email app that takes the pain out of managing your inbox, making it effortless to stay organized, productive, and responsive.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Since

    • Since 2023

    Platforms

    • Online
    • Android
    • iPhone
    • iPad
    • Android Tablet
    • Gmail
    Good alternative?
     
  12. Kanmail icon
     3 likes

    Transform chaotic inboxes into organized workflows. See all your email folders as kanban columns. Combine all your Gmail, Outlook and more accounts into one unified view.

    Cost / License

    • Freemium
    • Open Source

    Application type

    Since

    • Since 2020

    Platforms

    • Windows
    • Mac
    • Linux
    • GB flagUnited Kingdom
    Kanmail contrast (default) theme
    Good alternative?
     
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