Alternatives to Thunderbird for all platforms with any license

  • K-9 Mail icon

    K-9 Mail

    K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable...

    Open Source Android Android Tablet

  • SeaMonkey icon


    The SeaMonkey project is a community effort to develop the SeaMonkey all-in-one internet application suite. RAM-demand similar to Mozilla Firefox . Such a software suite was previously made popular by...

    Open Source Mac Windows Linux BSD

  • eM Client icon

    eM Client

    eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts and chat.

    Free Personal Windows

    • Best solution for people who uses google calendar. podecreMar 2016 Disagree   Agree
  • Apple Mail icon

    Apple Mail

    There’s big news attached. The best way to manage email on a Mac gets even better with OS X Yosemite.

    Free Mac iPhone iPad

    No features added Add a feature
  • Mailbird icon


    Mailbird is more than just another email client - It's an all-in-one communication platform for email, contacts, calendar, apps, task management, video meetings and much more. Try it free, today.

    Freemium Windows

    No features added Add a feature
    • Mailbird is missing most of the features which Thunderbird offers, like encryption and plugins Guest • Jan 2016 Disagree   Agree
  • Evolution icon


    Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since...

    Open Source Linux BSD GNOME

  • Nylas Mail icon

    Nylas Mail

    Nylas Mail is an email client designed to be friendly and easy to use but also powerful and highly extensible. It works "out of the box" with all the major email services like Gmail, Yahoo and iCloud and the lightweight...

    Freemium Mac Windows Linux Web / Cloud Self-Hosted

    • It offers great sync capabilities, however requires you to pay for the service after a trial period. Guest • Jul 2016 Disagree   Agree
    • Good if you plan on spending $7+$9/mo as site suggests. The free one reuires you to be a nerd. If you're not ready for any of the options above, scroll down! Guest • Nov 2016 Disagree   Agree
    • Totaly free and opensource beside to Mailbird. Beautifull and full functionnal. I prefer N1 rather than Mailbird stanwakeruFeb 2016 Disagree   Agree
  • Geary icon


    Geary is an email application built for GNOME 3. It allows you to read and send email with a simple, modern interface.

    Open Source Linux BSD GNOME

    No features added Add a feature
  • Postbox icon


    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. ...

    Commercial Mac Windows

  • Claws Mail icon

    Claws Mail

    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 ...

    Open Source Windows Linux BSD Xfce

    • Small and quick and not flooded with choices! Guest • Jun 2016 Disagree   Agree
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  • Sylpheed icon


    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. Sylpheed uses GTK+ GUI toolkit. The...

    Open Source Mac Windows Linux BSD

    No features added Add a feature
  • Mutt icon


    Mutt is a small but very powerful text-based mail client for Unix operating systems. Some of its features are: color support, message threading, MIME support (including RFC2047 support for encoded headers), PGP/MIME (RFC2015), various...

    Open Source Mac Windows Linux Xfce

  • Inky icon


    End-to-End Encrypted Email that is a Delight to Use, on all devices, with all email accounts.

    Commercial Mac Windows Android iPhone Android Tablet iPad

    No features added Add a feature
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  • Spark icon


    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.

    Free Mac iPhone iPad Apple Watch

    No features added Add a feature
  • FossaMail icon


    FossaMail is an Open Source, Mozilla Thunderbird -based mail, news and chat client for Windows and Linux, brought to you by the Pale Moon developers. FossaMail: Is built from source with compiler optimizations...

    Open Source Windows Linux

    No features added Add a feature
  • Zimbra Desktop icon

    Zimbra Desktop

    The free Zimbra Desktop client allows you to meld the online and offline worlds – storing and synching your email, calendar, contacts, files and documents in the cloud, yet having them locally accessible when on the road. Zimbra...

    Free Personal Mac Windows Linux

    No features added Add a feature
    • This one goes beyond the features and qualities of Thunderbird which is the very reason I am looking for an alternative! Guest • Dec 2016 Disagree   Agree
  • Newton icon


    Newton (previously CloudMagic) is a fully featured mail client available for Android, iOS and macOS. Works for watch too. It's based on cloud so you can connect it to any account and get fast search, push notifications, read...

    Commercial Mac Android iPhone Android Tablet iPad Apple Watch ... Android Wear

  • Mail Wise icon

    Mail Wise

    Mail Wise – Read Just What You Need. The best conversation threads ever. A free email client that transforms messy emails into clean and clear conversations. Get all your mail done in one simple and effective email app. Easily setup...

    Freemium Android

  • ALTO Mail icon

    ALTO Mail

    Alto Mail makes managing your email easy again. Add all your mail accounts to our app (including Gmail, Outlook, Yahoo!, AOL Mail, iCloud, Hotmail and others) and see all of your email in one place. Beyond the typical inbox display...

    Free Web / Cloud Android iPhone Android Tablet iPad

  • Trojitá icon


    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.

    Open Source Windows Linux

  • Kontact - KMail icon

    Kontact - KMail

    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...

    Open Source Mac Windows Linux BSD

    No features added Add a feature
  • TypeApp icon


    TypeApp is an all-free, beautifully designed, universal email app, capable of managing unlimited number of mail accounts from various providers, allowing for smart push notifications while enabling personalization across multiple...

    Free Personal Android iPhone Android Tablet iPad Android Wear Kindle Fire

  • MailMate icon


    MailMate is an IMAP email client for Mac OS X featuring extensive keyboard control, Markdown supported email composition.

    Commercial Mac

Thunderbird Comments

Excellent Email Client -1 Helpful

Positive Comment by Zivistrov
about Thunderbird Apr 2015

One of the best, if not thee best desktop email client.

[Edited by Zivistrov, April 11]


Le logiciel phare de messagerie

Positive Comment by Daratoft
about Thunderbird Feb 2015

Thunderbird fait parti des piliers des clients de messagerie, à mon goût.
Personnalisable avec des extensions, son catalogue n'est cependant pas extraordinairement fourni.
Pour ma part, il dispose de tout ce qui est nécessaire à son utilisation.

J'en profite pour vous faire part de trois extensions très pratiques, disponibles à cette adresse : SOGo Frontends (ce n'est ni du phishing, ni du spam, l'URL est tout à fait fiable) :

  • la première, c'est l'agenda Lightning. Dans les modules de Thunderbird, on ne le trouve pas dans sa version officielle, aucune idée du pourquoi...
  • la seconde, nommée Connector, permet de synchroniser ses contacts (avec Owncloud par exemple)
  • la seconde, nommée Integrator, permet de synchroniser son agenda (avec Owncloud par exemple)

Ces extensions ne sont guère mises en avant, je ne sais pas pourquoi, mais je les utilise depuis plusieurs mois et tout va pour le mieux. Vous trouverez aisément sur la toile des tutoriaux sur la manière d'utiliser les deux extensions de SOGo. Au pire, laisser moi un message ici et je verrai ce que je peux faire.


Mozilla neglects Thunderbird

Comment by LAN
about Thunderbird Aug 2014

Thunderbird is a great e-mail program, but unfortunately Mozilla neglects it: it only releases security and stability updates, and only community developes new features.


Páratlanul jó.

Positive Comment by User8657307
about Thunderbird Mar 2014

Egyszeru és nagyszeru.Hajrá Mozilla :)

Easy and great. Go Mozilla :)

[Translated by Venom88, March 30]


Decent, but stagnant 1 Helpful

Comment by endolith
about Thunderbird and Google Chrome Jul 2011

Thunderbird is a good app, but it seems to be stagnating. Mozilla is too busy trying to copycat Chrome and not putting any time into fixing TB bugs.


I like Thunderbird and Evolution.

Positive Comment by UncleNinja
about Thunderbird and Evolution Jun 2011

I like this and Evolution. I can't really say which is better. :/


I think, today the best E-Mail-Solution with most advantage ... -2 Helpful

Comment by em4020
about Thunderbird Jun 2011

I think, today the best E-Mail-Solution with most advantages free of charge is the combination of UNLIMITED AOL Web-Mail Archive (IMAP) with Mozilla Thunderbird as a User Interface, which has nearly all useful features, that the professional commercial product Outlook has.
For detailed Information about 6 disadvantages of Web-GMail compared with Thunderbird or Outlook + AOL mail see: and .
In Addition to this, GMail has the little mistake: GMail filters, which delete mails AND place a label, loose the label: the label is substituted after some days with the empty label "".
Details and voting-possibility see in German:


I don't use it anymore 1 Helpful

Negative Comment by bigcat2009
about Thunderbird Jun 2011

It was too slow and it lost one attachment once, so I don't use it anymore


For Information about 6 disadvantages of Web-GMail compared ...

Comment by em4020
about Thunderbird Jun 2011

For Information about 6 disadvantages of Web-GMail compared with Thunderbird/Outlook/AOL mail see: