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Alternatives

Best Thunderbird alternatives in 2026

Thunderbird is free desktop email app with calendar and contacts. These 5 alternatives come from the same rankings, ordered by editorial score. Connected products carry a small, disclosed lift.

5 alternatives From best email clients How we rank

Ranked alternatives

  1. 1

    Spark

    Also runs on iOS, Android. One app on iOS, Mac, Android and Windows, with a smart inbox that sorts mail by importance. Its code is closed, and its Premium plan adds the paid features.

    Best for One inbox across phone and desktop

    iOSmacOSAndroidWindowsFree plan, paid upgrades

    88.0score
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  2. 2

    Mailspring

    Open-source GPL-3.0 desktop client for Mac, Windows and Linux, with send later and grammar checking. Its read receipts and link tracking may not suit privacy-minded users, and the Pro plan is $8 per month.

    Best for Open-source desktop mail with send later

    macOSWindowsLinuxFree plan, paid upgradesOpen source

    86.5score
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  3. 3

    eM Client

    Also runs on Android, iOS. Covers Windows, Mac, Android and iOS with sync for Gmail and Hotmail, and a free version for home users. It is closed source, and its AI features are sold as add-ons.

    Best for Desktop and phone email for home users

    WindowsmacOSAndroidiOSFree plan, paid upgrades

    85.0score
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  4. 4

    Mail

    Also runs on iOS. Built into Mac and iPhone at no cost and needs no download on Apple devices. It has no Windows or Android version, so it is limited to Apple users.

    Best for Email on Apple devices with no extra app

    macOSiOSFree

    84.0score
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  5. 5

    Mailbird

    Combines Gmail, Outlook, Exchange and IMAP accounts in one Windows or Mac workspace, free to download. It has no phone app on its site and is closed source.

    Best for Several work and personal accounts on a desktop

    WindowsmacOSFree plan, paid upgrades

    79.5score
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Narrow the alternatives

Thunderbird alternatives for Android

Thunderbird alternatives for iOS

About Thunderbird alternatives

What is the best alternative to Thunderbird?
On listme.name the highest-scored alternative is Spark, followed by Mailspring. The right choice depends on price, platform and whether you need open source.
Is there a free alternative to Thunderbird?
Yes. Free options include Spark, Mailspring, eM Client.