Alternatives to Postbox for all platforms with any license

  • Thunderbird icon


    Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after...

    Open Source Mac Windows Linux BSD Haiku

  • Inbox by Gmail icon

    Inbox by Gmail

    Built on everything that we've learned from Gmail, Inbox is a fresh start that goes beyond email to help you get back to what...

    Free Web / Cloud Android iPhone Chrome OS iPad Chrome

  • 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

  • Mailbird icon


    The Best Email Client for Windows 7, 8 & 10 - Mailbird is more than just another email client. It's an all-in-one...

    Freemium Windows

  • eM Client icon

    eM Client

    Fully functional alternative to Microsoft Outlook, including native interoperability with Exchange servers.

    Free Personal Windows

  • Evolution icon


    Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail...

    Open Source Linux BSD GNOME

  • Nylas N1 icon

    Nylas N1

    N1 is an email client designed to be friendly and easy to use but also powerful and highly extensible. It works "out of the...

    Freemium Mac Windows Linux Web / Cloud Self-Hosted

  • 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

  • Claws Mail icon

    Claws Mail

    Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response Graceful, and sophisticated...

    Open Source Windows Linux BSD Xfce

  • Airmail icon


    Airmail is a lightweight and lightning fast mail client for Mac. Feature list: Accounts: - Unified Inbox and folders - Multi...

    Commercial Mac iPhone iPad Apple Watch

  • Sylpheed icon


    Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA). Sylpheed runs on many systems such...

    Open Source Mac Windows Linux BSD

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  • 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

  • The Bat icon

    The Bat

    The Bat! is a secure email client software, built to protect your correspondence against third-parties.

    Commercial Windows

  • EssentialPIM icon


    EssentialPIM lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and...

    Freemium Windows Android iPhone

  • Sparrow icon

    Sparrow Discontinued

    Sparrow is a minimalist mail application for Mac. It was designed to keep things simple and efficient. No fancy stuff here... just...

    Commercial Mac iPhone

  • 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...

    Open Source Mac Windows Linux Xfce

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  • 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...

    Free Personal Mac Windows Linux

  • Windows Live Mail icon

    Windows Live Mail Discontinued

    Windows Live Mail (formerly named Windows Live Mail Desktop) is a freeware email client from Microsoft. It is the successor to Outlook...

    Free Windows

  • Polymail icon


    The most powerful platform for email productivity in a beautiful native app — on desktop and mobile.

    Free Mac iPhone iPad

  • Trojitá icon


    Trojitá, is a fast Qt IMAP e-mail client that respects open standards and facilitates modern technologies. Trojitá values...

    Open Source Windows Linux

  • Spark icon


    E-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various...

    Free iPhone iPad Apple Watch

  • FossaMail icon


    FossaMail is an Open Source, Mozilla Thunderbird -based mail, news and chat client for Windows and Linux, brought to you by...

    Open Source Windows Linux

  • Mail icon


    Windows 10 has Mail and Calendar apps already built in. With the Mail application you can now...

    Free Windows

  • 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...

    Free Web / Cloud Android iPhone Android Tablet iPad

  • Unibox icon


    Unibox is a people centric email client that organizes your messages by person. It avoids having email like a to-do list. Features:...

    Commercial Mac

  • Becky! Internet Mail icon

    Becky! Internet Mail

    Becky! Internet Mail is an email client for Windows OS. Becky! Internet Mail supports POP3, IMAP and S/MIME as well as PGP/PGP via...

    Commercial Windows

  • Kontact icon


    Kontact is the integrated Personal Information Manager of KDE. Kontact suite unites mature and proven KDE PIM applications under...

    Open Source Windows Linux

  • TypeApp icon


    TypeApp is an all-free, beautifully designed, universal email app, capable of managing unlimited number of mail accounts from various...

    Free Personal Android iPhone Android Tablet iPad Android Wear Kindle Fire

  • 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...

    Open Source Mac Windows Linux BSD

  • sup icon


    Sup is a console-based email client for people with a lot of email. It supports tagging, very fast full-text search, automatic...

    Open Source Linux

  • nPOPuk icon

    nPOPuk Discontinued

    nPOPuk is an ultra-small, but comprehensive, e-mail client that runs on a wide range of Windows-based operating systems

    Open Source Windows Windows Mobile

  • Kiwi for Gmail icon

    Kiwi for Gmail

    Kiwi for Gmail (formerly Gmail for Mac) turns Gmail into a full-powered desktop email client. No one wants to use Gmail in the browser...

    Freemium Mac

Postbox Comments

As already told, its better or simply more complete than Mo ...

Comment by Pr1me
about Postbox Jun 2011

As already told, its better or simply more complete than Mozilla Thunderbird but (to me) its not worth the 40 bucks. That said I think that it could be a good investment if you need an email app for your company, but for personal use I say nah.


Postbox has some really nice features beyond what Thunderbi ...

Comment by wfaulk
about Postbox Jun 2011

Postbox has some really nice features beyond what Thunderbird can do. I've been using it for about two months now and have mostly enjoyed using it. There are a few bugs and UI quirks, but they should be worked out eventually. That said, they're now starting to charge for it. And they're charging $40 for it. It's simply not worth that much. $15? Sure. But not $40.


It's good but now they've started charging which seems fool ...

Comment by campbell2644
about Postbox Jun 2011

It's good but now they've started charging which seems foolish when Thunderbird,Sea Monkey & Evolution are free and of comparable quality


Great alternative if you've been disappointed by the slow d ...

Comment by Lummo
about Postbox Jun 2011

Great alternative if you've been disappointed by the slow development of Thunderbird. The search functionality is great - allowing you to quickly find previous emails from the same person, or all the attachments you've received in the last few months. Another great feature is the conversation view which shows you the chain of replies, similar to Gmail. Really enjoying Postbox at the moment after using Thunderbird 2 for a long time and even trying the Thunderbird 3 betas.