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Mailu alternatives · Email

Mailu alternatives with a Windows app

The Mailu listing does not include a Windows app. 39 of the 125 other email apps in this directory list a Windows app.

Mailu is free to use. 25 of them are free or have a free plan.

39 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

The 12 closest to Mailu

  1. Inbox Zero

    Open source AI email assistant for Gmail and Outlook

    • Inbox Zero starts at $18 per user / month, billed annually ($20 billed monthly). Mailu is free.
    • Mailu has a free plan. Inbox Zero does not, though it has a free trial.
    • Only Inbox Zero lists macOS, Windows, iOS and Android apps.
    • Only Inbox Zero lists a browser extension.
    Inbox Zero pricing and details

  2. Zimbra

    Self-hosted email, calendar and file sharing for organizations

    • Mailu has a free plan. Zimbra does not.
    • Only Zimbra lists Windows, macOS, Linux, iOS and Android apps.
    • Zimbra also covers tasks and calendar.
    • Mailu also covers dMARC.
    Zimbra pricing and details

  3. Proton Mail

    End-to-end encrypted email service based in Switzerland

    • Proton Mail starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly. Mailu is free.
    • Only Proton Mail lists macOS, Windows, Linux, iOS and Android apps.
    • Proton Mail is end-to-end encrypted, according to its own site.
    • Mailu is self-hostable, according to its own site.
    Proton Mail pricing and details

  4. Thunderbird

    Free, open-source email app for Windows, macOS, Linux and Android

    • Thunderbird is free. Mailu is free.
    • Only Thunderbird lists Windows, macOS, Linux and Android apps.
    • Only Mailu lists a web app.
    • Mailu is self-hostable, according to its own site.
    Thunderbird pricing and details

  5. Tuta Mail

    End-to-end encrypted email and calendar from Germany

    • Tuta Mail starts at €3 per month, paid yearly (lowest paid personal plan). Mailu is free.
    • Only Tuta Mail lists Windows, macOS, Linux, iOS and Android apps.
    • Tuta Mail is end-to-end encrypted, according to its own site.
    • Mailu is self-hostable, according to its own site.
    Tuta Mail pricing and details

  6. Mailspring

    Open-source desktop email client for Mac, Windows and Linux

    • Mailspring starts at $8 per month, or $85 per year (Mailspring Pro). Mailu is free.
    • Only Mailspring lists macOS, Windows and Linux apps.
    • Only Mailu lists a web app.
    • Mailu is self-hostable, according to its own site.
    Mailspring pricing and details

  7. Wino Mail

    Free, open source mail and calendar app for Windows

    • Only Wino Mail lists a Windows app.
    • Only Mailu lists a web app.
    • Mailu is self-hostable, according to its own site.
    • Wino Mail also covers templates, tasks and calendar.
    Wino Mail pricing and details

  8. Claws Mail

    Lightweight GTK email and news client, free under the GPL

    • Claws Mail is free. Mailu is free.
    • Only Claws Mail lists Linux and Windows apps.
    • Only Mailu lists a web app.
    • Mailu is self-hostable, according to its own site.
    Claws Mail pricing and details

  9. Betterbird

    A fork of Thunderbird with extra features and bug fixes

    • Betterbird is free. Mailu is free.
    • Only Betterbird lists Windows, macOS and Linux apps.
    • Only Mailu lists a web app.
    • Mailu is self-hostable, according to its own site.
    Betterbird pricing and details

  10. Sylpheed

    Lightweight desktop email client built on GTK+

    • Sylpheed is free. Mailu is free.
    • Only Sylpheed lists Windows, macOS and Linux apps.
    • Only Mailu lists a web app.
    • Mailu is self-hostable, according to its own site.
    Sylpheed pricing and details

  11. Axigen

    Mail server with calendars and webmail for Windows and Linux

    • Only Axigen lists Windows and Linux apps.
    • Mailu is open source, according to its own site.
    • Axigen also covers calendar.
    • Mailu also covers dMARC.
    Axigen pricing and details

  12. MDaemon

    Email server for Windows with webmail and Outlook connector

    • Mailu has a free plan. MDaemon does not, though it has a free trial.
    • Only MDaemon lists Windows and macOS apps.
    • Mailu is open source, according to its own site.
    • MDaemon also covers calendar.
    MDaemon pricing and details

27 more that list a Windows app

All 39 in one table

Common questions

Which Mailu alternatives have a Windows app?

Inbox Zero, Zimbra, Proton Mail, Thunderbird, Tuta Mail, Mailspring, Wino Mail, Claws Mail and 31 more list a Windows app.

Does Mailu have a Windows app?

The Mailu listing does not include a Windows app. It lists Web.

Which of these email apps are free?

Proton Mail, Thunderbird, Tuta Mail, Mailspring, Wino Mail, Claws Mail, Betterbird, Sylpheed and 17 more are free or have a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 4, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Mailu: the alternatives its listing names first, then the tools that share the most features with it.