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
  2451
  • ...

Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.

More about Thunderbird
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Thunderbird alternatives page was last updated Feb 13, 2025
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Alternatives
  1. ElectronMail icon

    ElectronMail

     23 likes
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    ElectronMail is an Electron-based unofficial desktop client for ProtonMail and Tutanota end-to-end encrypted email providers. The app aims to provide enhanced desktop user experience enabling features that are not supported by the official in-browser web clients.

    8 ElectronMail alternatives

    License model

    • Free • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • ProtonMail
    • Electron / Atom Shell
    • Tutanota
    ElectronMail screenshot 1

    Properties

    1.  Privacy focused

    Features

    1.  End-to-End Encryption
    2.  Multiple Account support
    3.  Ad-free
    4.  Full-Text Search
    5.  Electron based

    ElectronMail VS Thunderbird

     
    Comments about ElectronMail as an Alternative to Thunderbird
    Guest
    Negative •Oct 3, 2019
    17

    Thunderbird connects with servers that use standard protocols and with servers for which a plugin was developed. ElectronMail works with ProtonMail ONLY and was specifically designed for this provider. Tutanota support is deprecated since July 2019.

    Guest
    Negative •Oct 8, 2021
    3

    It's only used for one provider

    Thunderbird Icon
    ElectronMail icon
    • ElectronMail is Free and Open SourceThunderbird is also Free and Open Source
    • ElectronMail is Privacy focusedThunderbird is not according to our users
  2. 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.

    64 Spike alternatives

    License model

    • Freemium • Proprietary

    Application types

    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

    Top Spike Features

    1.  Unified inbox
    2.  Dark Mode
    3.  Email Organizer
    4.  Cloud Sync
    5.  Multiple Account support
    6.  Reminders
    7.  Real time collaboration
    8.  Live Preview
    9.  Built-in File Manager
    10.  Send later
    11.  Read confirmation
    12.  Snooze reliability

    Spike VS Thunderbird

     
    Comments about Spike as an Alternative to Thunderbird
    Guest
    Positive •Aug 8, 2020
    1

    Native onlye for Android, iOS, Windows and Mac, not a Linux app

    Thunderbird Icon
    Spike icon

    • Spike is the most popular SaaS alternative to Thunderbird.

    • Spike is Freemium and ProprietaryThunderbird is Free and Open Source
  4. Trojitá icon

    Trojitá

     17 likes
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    Trojitá, is a fast Qt IMAP e-mail client that respects open standards and facilitates modern technologies. Trojitá values vendor-neutrality that IMAP provides and is committed to be as interoperable as possible.

    37 Trojitá alternatives

    License model

    • Free • Open Source

    Application type

    Platforms

    • Windows
    • Linux
    Home
    Discontinued

    The last update is from June 2016.

    Trojitá Features

    1.  QT Based
    2.  IMAP Support

    Trojitá 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. Zimbra Desktop icon

    Zimbra Desktop

     32 likes
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    The free Zimbra Desktop client allows you to meld the online and offline worlds – storing and synching your email, calendar, contacts, files and documents in the cloud, yet having them locally accessible when on the road.

    57 Zimbra Desktop alternatives

    License model

    • Free Personal • Proprietary

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

    • Mac
    • Windows
    • Linux
    Zimbra Desktop screenshot 1

    Zimbra Desktop Features

    1.  Email checker

    Zimbra Desktop VS Thunderbird

     
    Comments about Zimbra Desktop as an Alternative to Thunderbird
    michael111
    Positive •Apr 15, 2019
    0

    tried it over a few weeks, all you need for office users

    Guest
    Positive •Dec 25, 2016
    -4

    This one goes beyond the features and qualities of Thunderbird which is the very reason I am looking for an alternative!

    Thunderbird Icon
    Zimbra Desktop icon

    • Most users think Zimbra Desktop is a great Thunderbird alternative.

    • Zimbra Desktop is Free Personal and ProprietaryThunderbird is Free and Open Source
  7. The Bat icon

    The Bat

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

    55 The Bat alternatives

    License model

    Application type

    Country of Origin

    • MD flagMoldova

    Platforms

    • Windows
    The Bat screenshot 1

    Properties

    1.  Lightweight

    Features

    1.  PGP Encryption
    2.  Support for scripting
    3.  GPG Encryption
    4.  OpenPGP
    5.  Works Offline
    6.  No Tracking
    7.  Dark Mode
    8.  Ad-free
    9.  Email Organizer
    10.  No Coding Required
    11.  Full-Text Search
    12.  Built-in RSS reader

    The Bat VS Thunderbird

     
  8. Missive icon

    Missive

     16 likes
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    Collaborative email and threaded group chat for productive teams. A single app for all your internal and external communication.

    22 Missive alternatives

    License model

    Application types

    Country of Origin

    • CA flagCanada

    Platforms

    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    The perfect shared inbox!

    Missive Features

    1.  Unified inbox
    2.  Shared inbox
    3.  Threaded Conversations
    4.  Email Scheduling
    5.  Multiple Account support
    6.  Customer service
    7.  Email automation
    8.  Integrated Web Browser
    9.  Snooze Mail

    Missive VS Thunderbird

     
  10. LucaMail icon

    LucaMail

     9 likes
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    LucaMail is an open source, cross-platform email client. LucaMail is developed to provide cross-platform alternative to Email Clients that are really exists. LucaMail focuses on modern technologies as well as maintaining a user-friendly UI.

    72 LucaMail alternatives

    License model

    • Free • Open Source

    Application type

    Country of Origin

    • IN flagIndia

    Platforms

    • Mac
    • Windows
    • Linux
    LucaMail screenshot 1
    Discontinued

    Repository marked as archived as of Dec 24, 2022. No new releases since May 26, 2022.

    LucaMail Features

    1.  Dark Mode
    2.  IMAP Support

    LucaMail VS Thunderbird

     
    Comments about LucaMail as an Alternative to Thunderbird
    sp4mmed
    Negative •Oct 7, 2022
    -1

    The lack of POP support means this is useless for my purposes. Since Thunderbird DOES support POP this means LucaMail is NOT an alternative.

    Thunderbird Icon
    LucaMail icon
    • LucaMail is Free and Open SourceThunderbird is also Free and Open Source
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