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

      • FreeProprietary
      • Mac
      • Windows
      • Linux
      • Firefox
      Simple Mail is a mail client for Firefox. It allows you to get notified, read and write messages for multiple email accounts inside Firefox. Usage:
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      Simple Mail vs Thunderbird opinions
      pros, cons and recent comments
      This is not a mail app. It is a plugin for Firefox, and apparently only for some older versions of Firefox.
      Negative comment over 5 years ago

      4
      • Online
      SUPERHUMAN IS NOT JUST ANOTHER EMAIL CLIENT We rebuilt the inbox from the ground up to make you brilliant at what you do. We specifically designed it for those of you who want the best.
      No screenshots yet
      Superhuman vs Thunderbird opinions
      pros, cons and recent comments
      chloekavanaugh Just discovered it and it blew my mind! With so many email clients out there, there is hardly room for innovation, but Superhuman is so well designed that it offers a completed different experience. Never got to #InboxZero faster.
      Positive comment over 2 years ago

      0


      • FreeOpen Source
      • Mac
      • Windows
      • Linux
      • BSD
      Columba is an email client written in Java, featuring a user-friendly graphical interface with wizards and internalionalization support. Its a powerful mail management tool with features to enhance your productivity and communication.

      Discontinued

      The project is no longer developed. Last version, 1.4, released in March 2007, can be still downloaded from SourceForge.

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      • FreeProprietary
      • Windows
      • Linux
      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.

      Discontinued

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

      • Free PersonalProprietary
      • Mac
      • iPhone
      • iPad
      Mynigma is a new kind of email client with built-in encryption.

      Discontinued

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

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    1. 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.
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      • FreeProprietary
      • Mac
      A standards-based email client.

      Discontinued

      Project is discontinued. No more updates or bugfixes.

      No screenshots yet
      • FreeOpen Source
      • Windows
      The email client where security comes first. Remail is an open source email client that contains pretty much all your accounts! Remail currently supports these email services: Gmail Outlook iCloud Mail Yahoo Mail Mail.
      No screenshots yet
      • FreeOpen Source
      • Mac
      • Windows
      • Linux
      Fork of the Iceape-UXP Internet Suite. I forked this to learn how a classic Mozilla application works and also because I feel that development on Iceape-UXP is too slow.
      No screenshots yet
      • Windows
      • Windows S
      Navigate messages with zooms and swipes across your messages.
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    Showing 80 of 89 alternatives