Free Thunderbird Alternatives

The best free alternative to Thunderbird is K-9 Mail, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Thunderbird and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Thunderbird are Claws Mail, Evolution, SeaMonkey and Geary.

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Thunderbird alternatives are mainly Email Clients but may also be Calendar Apps or RSS Readers.  Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of Thunderbird.
Thunderbird iconThunderbird
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Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.

More about Thunderbird
More about Thunderbird
Thunderbird alternatives page was last updated Nov 4, 2024
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  1. Icedove-UXP icon
    Icedove-UXP icon

    Icedove-UXP

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    Historically, Icedove was a re-branding of Thunderbird by the Debian project, with minimal modifications, in order to resolve branding disputes. Debian since discontinued Iceweasel in February of 2017 after reaching an agreement with Mozilla over the use of it's trademark.

    16 Icedove-UXP alternatives

    License model

    • Free • Open Source

    Application type

    Platforms

    • Linux

    Top Icedove-UXP Features

    1.  Import/Export OPML Feeds
    2.  Integrated Password Manager
    3.  Support for Themes
    4.  Multiple Account support
    5.  Extensible by Plugins/Extensions
    6.  Calendar Integration
    7.  Built-in Calendar
    8.  Gmail integration
    9.  IMAP Support
    10.  Tabbed interface
    11.  Legacy addons support
    12.  Customizable
    Icedove-UXP iconThunderbird Icon

    Icedove-UXP VS Thunderbird

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  2. Ymail2 icon
    Ymail2 icon

    Ymail2

     2 likes
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    yMail2 is a standalone email client for Windows (and Linux), available for free since 2003. Now with SSL support included so you can use it with Gmail and Hotmail POP3 and SMTP accounts.

    47 Ymail2 alternatives
    Ymail2 screenshot 1

    License model

    • Free • Proprietary

    Application type

    Platforms

    • Windows
    • Linux
    Discontinued

    Latest version is 2.0.4.3, dated 24 Jan 2014. See http://www.spacejock.com/yMail2_Download.html

    Ymail2 iconThunderbird Icon

    Ymail2 VS Thunderbird

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  4. EasyEmail Client icon
    EasyEmail Client icon

    EasyEmail Client

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    Email client and email notifier in one. Allows you to send, receive, and manage e-mails, get notifications of incoming email messages from your buddies, coworkers or family members online. Contains free email sender interface ready to cooperate with other software via XML, CSV...

    7 EasyEmail Client alternatives
    E-mail notification side panel with your own list of buddies.

    License model

    • Freemium • Proprietary

    Application type

    Platforms

    • Windows
    Email buddy notifier.
    Three modes of the buddies in the buddy list.
    +5
    Email accounts notifier.

    EasyEmail Client Features

    1.  Mail Filtering
    2.  Email Organizer
    3.  Email integration
    4.  Email Notifications
    5.  Gmail
    EasyEmail Client iconThunderbird Icon

    EasyEmail Client VS Thunderbird

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  5. Ad
    Screenshot
    Mailbird icon

    Mailbird

    Streamline your email experience by managing multiple accounts, integrating apps like Slack and Google Calendar, and using AI-driven features like drafting and spam prevention. Customize your workspace with themes, notifications,...

    https://www.getmailbird.com
    Learn More
  6. Iceape-UXP icon
    Iceape-UXP icon

    Iceape-UXP

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    Historically, Iceape was a re-branding of SeaMonkey by the Debian project. However, Debian discontinued Iceape in December 2013 citing security concerns and lack of a maintainer.

    152 Iceape-UXP alternatives

    License model

    • Free • Open Source

    Application type

    Platforms

    • Linux
    Iceape-UXP iconThunderbird Icon

    Iceape-UXP VS Thunderbird

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  7. Stoop icon
    Stoop icon

    Stoop

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    Stoop is a dedicated inbox for subscription content, including email newsletters and video channels, helping keep your personal email uncluttered. It operates without algorithms, allowing for a focused interaction with content.

    6 Stoop alternatives
    Stoop screenshot 1

    License model

    • Freemium • Proprietary

    Application type

    Platforms

    • iPhone
    • iPad

    Stoop Features

    1.  Email Organizer
    2.  Stay Focused
    3.  Content Discovery
    4.  Inbox Management
    Stoop screenshot 1
    Stoop screenshot 2
    Stoop iconThunderbird Icon

    Stoop VS Thunderbird

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  8. Mynigma icon
    Mynigma icon

    Mynigma

     2 likes
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    Mynigma is a new kind of email client with built-in encryption.

    26 Mynigma alternatives
    Mynigma screenshot 1
    Mynigma screenshot 2
    +2
    Mynigma screenshot 3

    License model

    • Free Personal • Proprietary

    Application type

    Platforms

    • Mac
    • iPhone
    • iPad
    Discontinued

    Has not been updated since September 2016 and website has no content.

    Mynigma iconThunderbird Icon

    Mynigma VS Thunderbird

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  10. Mailsmith icon
    Mailsmith icon

    Mailsmith

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    A standards-based email client.

    52 Mailsmith alternatives

    License model

    • Free • Proprietary

    Application type

    Platforms

    • Mac
    Discontinued

    Project is discontinued. No more updates or bugfixes.

    Mailsmith iconThunderbird Icon

    Mailsmith VS Thunderbird

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