Thunderbird AlternativesOnly apps from the EU

The best alternative to Thunderbird is Betterbird, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Thunderbird and 17 are so hopefully you can find a suitable replacement. Other interesting alternatives to Thunderbird are eM Client, FairEmail, KMail and myMail.

filter to find the best alternatives

Thunderbird alternatives are mainly Email Clients, but if you're looking for Calendar Apps or Contact Managers you can filter on that. Other popular filters include Linux, Open Source, iPhone, Windows, Windows + Open Source, Android and Free. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Thunderbird.
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Alternatives list

  1. Betterbird icon

    Betterbird

     70 likes
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    Betterbird, a soft fork of Mozilla Thunderbird, improves user experience with advanced features, bug fixes, security patches, and multi-row descriptions similar to Outlook. Compatible with multiple platforms and can be used alongside Thunderbird, sharing the same profile.

    28 Betterbird alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • Chocolatey
    Betterbird screenshot 1
     
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    5
    16
    Comments about Betterbird as an Alternative to Thunderbird
    Top Positive Comment
    Sam Lander
    3

    Betterbird does everything that Thunderbird does (it's a soft fork), while improving bugs and features.

    Because it's a soft fork, it retains the security implementations of Thunderbird.

    Thunderbird actually implements many of the bug fixes created by Betterbird, but at a much slower pace.

    drummer_nrg
    Positive
    1

    Betterbird is actively updated by a previous Thunderbird developer and is a fully compatible fork of Thunderbird which fixes some outstanding bugs. My add-ons like keepassxc-mail work fine!

    Guest
    Positive
    2

    It has many fixes for long existing bugs

    Review by a new / low-activity user.
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    3 of 5 comments
    Thunderbird Icon
    Betterbird icon

    • Almost everyone thinks Betterbird is a great Thunderbird alternative.

    • Betterbird is the most popular Mac alternative to Thunderbird.

    • Betterbird is Free and Open SourceThunderbird is also Free and Open Source
    • Betterbird is LightweightThunderbird is not according to our users
  2. eM Client icon

    eM Client

     232 likes
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    Looking for a full-featured email client with a modern and easy-to-use interface? Look no further than eM Client. Rated 3 out of 5, eM Client is a popular alternative to Thunderbird, offering all the features you need to manage your email, calendar, tasks, contacts, notes, and chat all in one place.

    With support for IMAP, calendar integration, and multiple accounts, eM Client is the perfect choice for users who want a robust email client that can handle all their needs. Whether you're using Windows or Mac, eM Client is the most popular proprietary alternative to Thunderbird, offering a powerful and flexible solution for managing your email and staying organized. Give it a try today and see why so many users are making the switch to eM Client.

    61 eM Client alternatives

    Cost / License

    • Freemium (Pay once)
    • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Android
    eM Client: Inbox view
     
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    12
    74
    Comments about eM Client as an Alternative to Thunderbird
    Comment summary: eM Client presents a clean interface with more built-in functions than Thunderbird, making it appealing for Mac and Windows users who prioritize design. However, users criticize it for being closed source, not supporting Linux, and having limited free accounts. Concerns include slow email rendering and potential phishing risks detected by antivirus software. Thunderbird remains favored for advanced configurability while eM Client is considered a viable alternative if users don't mind these limitations.
    Top Positive Comment
    3psilon
    2

    A good Windows alternative if you use 1-2 mailboxes or don't mind paying.

    Top Negative Comment
    LinuxDoge
    1

    doesnt support Linux, isnt open source, not configurable enough

    I am spezticle
    Negative
    1

    After installing I got malwarebytes and AVG antivirus alerts containing threats of phishing with urls such as "http://walmartsurvys.us/apple-touch-icon-precomposed.png" by way of the eM Client executable "MailClient.exe" There was a dozen more of them

    Do not install this phishing trash

    Review by a new / low-activity user.
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    3 of 12 comments
    Thunderbird Icon
    eM Client icon

    • Most users think eM Client is a great Thunderbird alternative.

    • eM Client is Freemium and ProprietaryThunderbird is Free and Open Source
  4. FairEmail icon

    FairEmail

     86 likes
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    Open-source, privacy-focused email client offering features such as encryption via OpenPGP and S/MIME, unlimited accounts, a unified inbox, customizable settings, and reformatted emails to prevent phishing. Supports two-way synchronization and provides Pro features for additional customization.

    43 FairEmail alternatives

    Cost / License

    • Freemium (Pay once)
    • Open Source

    Application type

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    Compose message view.
    Setup screen.
    Messages view with dark theme.
     
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    2
    12
    Comments about FairEmail as an Alternative to Thunderbird
    ByteRanger
    Negative
    -3

    While I do use FairEmail on my mobile devices and like it, it is not a valid alternative to Thunderbird which is for desktop platforms.

    Guest
    Negative
    -8

    wrong platform. FairEmail is not an alternative for Thunderbird users because it only runs on android. Thunderbird is for desktop operating systems only.

    Review by a new / low-activity user.
    Thunderbird Icon
    FairEmail icon

    • Most users think FairEmail is a great Thunderbird alternative.

    • FairEmail is Freemium and Open SourceThunderbird is Free and Open Source
    • FairEmail is LightweightThunderbird is not according to our users
  5. KMail icon

    KMail

     49 likes
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    KMail is the email component of Kontact, the integrated personal information manager of KDE. Kontact is a personal information manager and groupware software suite for KDE. It supports calendars, contacts, notes, to-do lists, news, and email.

    52 KMail alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Linux
    • BSD
    KMail screenshot 1
     
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    10
  6. myMail icon

    myMail

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

    29 myMail alternatives

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • iPhone
    • iPad
    myMail screenshot 1
    myMail screenshot 2
    myMail screenshot 3
     
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    1
    11
    Comments about myMail as an Alternative to Thunderbird
    Paul Karpo
    Positive
    3

    One of the best mobile email apps!

    Thunderbird Icon
    myMail icon

    • Almost everyone thinks myMail is a great Thunderbird alternative.

    • myMail is Free and ProprietaryThunderbird is Free and Open Source
  7. Trojitá icon

    Trojitá

     17 likes
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    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

    Alerts

    • Discontinued

    Platforms

    • Windows
    • Linux
    Home
     
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    7
  9. Airmail icon

    Airmail

     73 likes
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    Engineered for iOS, macOS, and watchOS, this fast mail client supports multiple account types, custom actions, Smart Inbox filtering, unified inbox, privacy mode, email scheduling, snooze, third-party app integration, flexible personalization, and advanced workflow tools.

    66 Airmail alternatives

    Cost / License

    • Pay once
    • Proprietary

    Application type

    Platforms

    • Mac
    • iPhone
    • iPad
    • Apple Watch
    Airmail screenshot 1
     
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    6
  10. Nextcloud Mail icon

    Nextcloud Mail

     11 likes
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    💌 Mail app for Nextcloud.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Nextcloud
     
  12. Mynigma icon

    Mynigma

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

    Cost / License

    • Free Personal
    • Proprietary

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • iPhone
    • iPad
    Mynigma screenshot 1
    Mynigma screenshot 2
    Mynigma screenshot 3
     
  13. Koma-Mail icon

    Koma-Mail

     4 likes
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    Koma-Mail is an email client which is comfortable and has very handy functions. It does not need an installation, so that you can run Koma-Mail from your flash drive but, of course, also on your desktop.

    Cost / License

    • Free
    • Proprietary

    Application types

    Alerts

    • Discontinued

    Platforms

    • Windows
    Koma-Mail screenshot 1
     
  14. mu icon

    mu

     5 likes
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    mu is a tool for dealing with e-mail messages stored in the Maildir-format, on Unix-like systems. mu's main purpose is to help you to find the messages you need, quickly; in addition, it allows you to view messages, extract attachments, create new maildirs, …

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Linux
    • BSD
    mu screenshot 1
     
12 of 17 Thunderbird alternatives