Best Thunderbird Alternatives in 2021

    Thunderbird is described as 'free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox' and is one of the leading apps in the News & Books category. There are more than 50 alternatives to Thunderbird for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is K-9 Mail, which is both free and Open Source. Other great apps like Thunderbird are eM Client (Freemium), Evolution (Free, Open Source), Feedly (Freemium) and Claws Mail (Free, Open Source).

    This page was last updated Jun 24, 2021

    1. Postbox is an email application that helps you organize your work life and get stuff done. It has all the elegance and simplicity of Apple Mail, but with more power and flexibility to manage even the most demanding workloads.
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      Postbox vs Thunderbird opinions
      Most users think Postbox is a great alternative to Thunderbird.
      JackVegas If you're using Windows 10 or a Mac, Postbox is hard to beat. I found myself so impressed with the trial that I had to buy the license in the end. It started out looking a lot like Thunderbird, but it really has come into its own over the past few years to the point where Thunderbird has nothing on Postbox.
      Positive comment over 1 year ago

      -1
    2. E-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various e-mail services and more.
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      Spark vs Thunderbird opinions
      Most users think Spark is a great alternative to Thunderbird.
      folkomaton Free, simple, reliable, easy to manage multiple accounts, fair amount of customization, synchronisation, templates
      Positive comment over 1 year ago

      0
      rmpbklyn no sorting, dont show allmail for gmail
      Negative comment about 3 years ago

      -3


      • Free PersonalProprietary
      • Mac
      • Windows
      • Linux
      • Android
      • iPhone
      • Chrome OS
      • Android Tablet
      • iPad
      • Apple Watch
      BlueMail is a modern, mobile first, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP,Exchange,POP3.
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      BlueMail vs Thunderbird opinions
      Some users think BlueMail is a great alternative to Thunderbird, some don't.
      bluemail pushes all your mail into their clud making it insecure
      Negative comment almost 2 years ago

      21
      It works on Android, but is not so powerfull.
      Positive comment almost 2 years ago

      0
      clear, easy to use lots of flexibility
      Positive comment over 2 years ago

      -2
    3. There’s big news attached. The best way to manage email on a Mac, according to Apple.
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      Apple Mail vs Thunderbird opinions
      Most users think Apple Mail is a great alternative to Thunderbird.
      I have used Thunderbird with IMAP for years, but the tiny font problem on Mac is now a dealbreaker, and with my decades of emails and folders, Thunderbird is flailing when fetching ail or moving folders. Apple Mail does what I need it to: manage multiple Gmail accounts, not be too slow, and let me adjust font size. The arrangement of folders/mailboxes in Apple Mail is not as intuitive as Tbird but I can deal with that.
      Positive comment over 3 years ago

      2
      You must download all your emails and there is no option to limit it!
      Negative comment about 4 years ago

      -7
    4. Mutt is a small but very powerful text-based mail client for Unix operating systems.
      Mutt vs Thunderbird opinions
      Most users think Mutt is a great alternative to Thunderbird.
      Thunderbird users want a GUI mail application. Mutt is a command line mail application. They are both good and both popular, but very much apples and oranges.
      Negative comment over 1 year ago

      10


    5. FairEmail is a privacy-focused email client with a setup wizard that helpfully walks you through the steps to use it with any email provider. There are many privacy settings including encryption via OpenPGP and S/MIME and reformatted emails to avoid phishing.
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      FairEmail vs Thunderbird opinions
      Most users think FairEmail is a great alternative to Thunderbird.
      wrong platform. FairEmail is not an alternative for Thunderbird users because it only runs on android. Thunderbird is for desktop operating systems only.
      Negative comment 10 months ago

      -5
    6. Get more done with the Google Tasks mobile app. Manage, capture, and edit your tasks from anywhere, at anytime, with to-dos that sync across all your devices. Integrations with Gmail and Google Calendar help you get tasks done—faster.
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    7. Windows 10 has Mail and Calendar apps already built in.
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      Microsoft Mail and Calendar vs Thunderbird opinions
      Most users think Microsoft Mail and Calendar is a great alternative to Thunderbird.
      kolappannathan It runs in background unlike Outlook and other email clients.
      Positive comment 6 months ago

      0
      • FreeOpen Source
      • Mac
      • Windows
      • Linux
      • BSD
      • PortableApps.com
      Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA). Sylpheed runs on many systems such as Windows, Linux, BSD, Mac OS X and other Unix-like systems.
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      Sylpheed vs Thunderbird opinions
      Most users think Sylpheed is a great alternative to Thunderbird.
      It doesn't encrypt password storage and doesn't have Master Password function
      Negative comment over 2 years ago

      2
    8. 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.
      Most users think Kontact - KMail is a great alternative to Thunderbird.
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