Postbox Alternatives

Postbox is described as 'Email application that helps you organize your work life and get stuff done' and is a very popular Email Client in the office & productivity category. There are more than 50 alternatives to Postbox for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Postbox alternative is Thunderbird, which is both free and Open Source. Other great apps like Postbox are Microsoft Outlook, Evolution, eM Client and Spark Mail.

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Alternatives list

  1. Sylpheed icon

    Sylpheed

     62 likes
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    Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).

    42 Sylpheed alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • PortableApps.com
    Main screen
     
  4. Airmail icon

    Airmail

     73 likes
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    Engineered for iOS, macOS, and watchOS, this fast mail client supports multiple account types, custom actions, Smart Inbox filtering, unified inbox, privacy mode, email scheduling, snooze, third-party app integration, flexible personalization, and advanced workflow tools.

    66 Airmail alternatives

    Cost / License

    • Pay once
    • Proprietary

    Application type

    Platforms

    • Mac
    • iPhone
    • iPad
    • Apple Watch
    Airmail screenshot 1
     
  5. Ad
    Screenshot
    Superhuman Mail icon
    Superhuman Mail

    Productivity-centered email application streamlines inbox management, uses AI for drafting responses, automates snippets, summarizes conversations, enables timely sends, integrates calendar and CRM, and includes collaborative fea...

    https://superhuman.com
    Learn More
  6. Spike icon

    Spike

     34 likes
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    Transform your email inbox into a collaborative workspace with Spike. Enjoy integrated chat-like emails, tasks, collaborative notes, and group projects. Seamlessly manage multiple accounts, organize priorities, and schedule meetings across devices.

    61 Spike alternatives

    Cost / License

    • Freemium (Subscription)
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Software as a Service (SaaS)
    • Meta Quest
    One powerful space for all your work needs—get email, chat, notes, tasks, calendar and audio/video calls all from your inbox
     

    • Spike is the most popular SaaS alternative to Postbox.

    • Spike is Freemium and ProprietaryPostbox is Paid and Proprietary
  7. TypeApp icon

    TypeApp

     30 likes
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    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 email accounts.

    54 TypeApp alternatives

    Cost / License

    • Free Personal
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Android Wear
    • Kindle Fire
    TypeApp screenshot 1
     
  8. Wino Mail icon

    Wino Mail

     8 likes
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    Wino is a lightweight native mail client for Windows 10/11. It is still in active development. Main motivation for this project is to replace Mail & Calendar for Windows with modern Windows design without using web technologies for speed.

    Cost / License

    • Freemium (Pay once)
    • Open Source

    Application type

    Platforms

    • Windows
    Wino Mail screenshot 1
     
  10. Mimestream icon

    Mimestream

     7 likes
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    Mimestream combines your favorite Gmail features with the power of a native macOS app so you can move through your email effortlessly.

    18 Mimestream alternatives

    Cost / License

    • Subscription
    • Proprietary

    Application type

    Platforms

    • Mac
    • Gmail
    Mimestream screenshot 1
     
  11. Mutt icon

    Mutt

     68 likes
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    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 features to support mailing lists, including...

    51 Mutt alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Xfce
    Mutt screenshot 1
     
  12. Shift Browser icon

    Shift Browser

     40 likes
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    Shift consolidates web applications into one platform, simplifying access to Google and Microsoft accounts. It declutters tabs, supports email management for Gmail and Outlook 365, integrates with extensions like Grammarly, LastPass, and more, while providing custom notifications and quiet hours.

    34 Shift Browser alternatives

    Cost / License

    • Freemium (Subscription)
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    Add all of your favorite apps, and access them right inside Shift!
     
  13. MailMate icon

    MailMate

     22 likes
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    Mac IMAP email client featuring keyboard control, Markdown email composition, advanced search capabilities, smart mailboxes, automatic signature handling, cryptographic options with OpenPGP/S-MIME, tagging, multiple notifications, and customizable layouts including widescreen.

    67 MailMate alternatives

    Cost / License

    • Subscription
    • Proprietary

    Application type

    Platforms

    • Mac
    • S/MIME
    • OpenPGP
    MailMate screenshot 1
     
  14. Superhuman Mail icon

    Superhuman Mail

     3 likes
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    Productivity-centered email application streamlines inbox management, uses AI for drafting responses, automates snippets, summarizes conversations, enables timely sends, integrates calendar and CRM, and includes collaborative features like live views and comments.

    54 Superhuman Mail alternatives

    Cost / License

    • Subscription
    • Proprietary

    Application type

    Platforms

    • Mac
    • Online
    • iPhone
    • iPad
    • Android
    • Android Tablet
    • Windows
    Superhuman Mail screenshot 1
    Superhuman Mail screenshot 2
    Superhuman Mail screenshot 3
     
  15. KMail icon

    KMail

     49 likes
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    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.

    52 KMail alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Linux
    • BSD
    KMail screenshot 1
     
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