Open Source Mailbird Alternatives

    The best open source alternative to Mailbird is Thunderbird, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Mailbird and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Mailbird are Mailspring (Freemium, Open Source), Evolution (Free, Open Source), Geary (Free, Open Source) and Claws Mail (Free, Open Source).

    This page was last updated Sep 14, 2021

    1. Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
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      Thunderbird vs Mailbird opinions
      Some users think Thunderbird is a great alternative to Mailbird, some don't.
      Thunderbird is way too bloated and slow
      Negative comment over 3 years ago

      9
      It's open source & based on Firefox engine which is known for it's brand !!
      Positive comment almost 5 years ago

      5
    2. Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro version adds read receipts, send later, reminders and more.
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      Mailspring vs Mailbird opinions
      Some users think Mailspring is a great alternative to Mailbird, some don't.
      Uses electron bloated framework that consumes many ram
      Negative comment over 1 year ago

      3


    3. Evolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality.
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      Most users think Evolution is a great alternative to Mailbird.
    4. Geary is an email application built around conversations, for the GNOME 3 desktop.
      Geary vs Mailbird opinions
      pros, cons and recent comments
      Unusable for my needs. Can't discard groupment of letters into conversations and delete or move to folder only single letter, not conversation entirely. And it shows only last letters in each conversation, other letters become invisible.
      Negative comment over 1 year ago

      0
    5. Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response Graceful, and sophisticated interface Easy configuration, intuitive operation Abundant features Extensibility Robustness and stability
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    6. Mutt is a small but very powerful text-based mail client for Unix operating systems.
      • 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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      • FreeOpen Source
      • Mac
      • Linux
      Kube is a modern communication and collaboration client built with QtQuick on top of a high performance, low resource usage core. It provides online and offline access to all your mail, contacts, calendars, notes, todo's and more.
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      • FreeOpen Source
      • Online
      • Self-Hosted
      A mail app for Nextcloud - Integration with other Nextcloud apps! Currently Contacts, Calendar & Files – more to come.
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    7. aerc is an email client that runs in your terminal. It's highly efficient and extensible, perfect for the discerning hacker.
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    Showing 10 of 20 alternatives