Thunderbird Alternatives for Windows

There are many alternatives to Thunderbird for Windows if you are looking for a replacement. The best Windows alternative is Claws Mail, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Thunderbird and many of them are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to Thunderbird are SeaMonkey, Betterbird, Mailbird and eM Client.

filter to find the best alternatives

Thunderbird alternatives are mainly Email Clients, but if you're looking for Calendar Apps or Group Chat Apps you can filter on that. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Thunderbird.
Thunderbird iconThunderbird
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Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.

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Thunderbird alternatives page was last updated Feb 13, 2025
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Alternatives
  1. Polymail icon

    Polymail

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

    78 Polymail alternatives

    License model

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Mac
    • Windows
    • Online
    • iPhone
    • iPad
    Polymail screenshot 1
    Polymail screenshot 2
    Polymail screenshot 3

    Polymail Features

    1.  Email Scheduling
    2.  Multiple Account support
    3.  IMAP Support
    4.  Sync Contacts
    5.  Email tracking

    Polymail VS Thunderbird

     
  2. HCL Domino icon

    HCL Domino

     6 likes
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    An enterprise application server that integrates information into a single workspace, integrates also a full mail server

    35 HCL Domino alternatives

    License model

    Application types

    Country of Origin

    • IN flagIndia

    Platforms

    • Mac
    • Windows
    • Online
    HCL Domino screenshot 1

    Top HCL Domino Features

    1.  Real time collaboration
    2.  Extensible by Plugins/Extensions
    3.  Full-Text Search
    4.  Cloud Sync
    5.  WYSIWYG Support
    6.  Shared Folders
    7.  Email Scheduling
    8.  AES-256 Encryption
    9. Google Calendar icon  Sync with Google Calendar
    10.  Email template editor
    11.  Reminders
    12.  Ad-free

    HCL Domino VS Thunderbird

     
  4. Nylas Mail Lives icon

    Nylas Mail Lives

     3 likes
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    Nylas Mail Lives is a fork of Nylas Mail that fixes many longstanding issues, improves the client experience, and is committed to publish new releases.

    31 Nylas Mail Lives alternatives

    License model

    • Free • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Self-Hosted
    Nylas Mail Lives screenshot 1
    Discontinued

    On its github page it states it is archived and is no longer maintained.

    Nylas Mail Lives Features

    1.  Extensible by Plugins/Extensions
    2.  Multiple Account support

    Nylas Mail Lives VS Thunderbird

     
  5. Ad
    Screenshot
    Mailbird icon
    Mailbird

    Streamline your email experience by managing multiple accounts, integrating apps like Slack and Google Calendar, and using AI-driven features like drafting and spam prevention. Customize your workspace with themes, notifications,...

    https://www.getmailbird.com
    Learn More
  6. KuNoMAIL icon

    KuNoMAIL

     Like
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    The email fun continues... Import your IncrediMail Stationery, E-Cards, E-Mails and Contacts.

    8 KuNoMAIL alternatives

    License model

    Application type

    Platforms

    • Windows
    KuNoMAIL screenshot 1

    KuNoMAIL Features

    1.  Assistant
    2.  Knowledge base

    KuNoMAIL VS Thunderbird

     
  7. Foxmail icon

    Foxmail

     19 likes
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    Foxmail is a free POP3 and IMAP4 e-mail client in English and Chinese for Windows systems.

    33 Foxmail alternatives

    License model

    • Free • Proprietary

    Application types

    Country of Origin

    • CN flagChina

    Platforms

    • Mac
    • Windows
    Foxmail screenshot 1

    Foxmail Features

    1.  Support for Gestures
    2.  Portable
    3.  IMAP Support
    4.  POP3 Support

    Foxmail VS Thunderbird

     
    Comments about Foxmail as an Alternative to Thunderbird
    Guest
    Positive •Jun 15, 2018
    -2

    The UI interface is greater, it has many great functions like notes, calendars, tags, etc. It could use POP, IMAP and Exchange accounts.

    Thunderbird Icon
    Foxmail icon

    • Most users think Foxmail is a great Thunderbird alternative.

    • Foxmail is Free and ProprietaryThunderbird is Free and Open Source
  8. OE Classic icon

    OE Classic

     1 like
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    OE Classic is an email and Usenet reader designed to be a perfect replacement for Outlook Express, Windows Mail, Windows Live Mail and even Mozilla Thunderbird.

    6 OE Classic alternatives

    License model

    • Freemium • Proprietary

    Application type

    Platforms

    • Windows
    OE Classic screenshot 1

    OE Classic VS Thunderbird

     
  10. WunderMail icon

    WunderMail

     2 likes
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    The missing native desktop client for Gmail on Windows 10.

    64 WunderMail alternatives

    License model

    • Freemium • Proprietary

    Application type

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Windows
    • Gmail
    WunderMail screenshot 1
    Discontinued

    Development seems to have stopped. The latest version on the Windows Store is from 2018.

    WunderMail Features

    1.  Gmail
    2. Gmail icon  Gmail integration

    WunderMail VS Thunderbird

     
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