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Thunderbird Alternatives for Windows

There are many alternatives to Thunderbird for Windows if you are looking for a replacement. The best Windows alternative is eM Client, which is free. 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 Claws Mail, Mailbird, Microsoft Office Outlook and Mailspring.

Thunderbird alternatives are mainly Email Clients but may also be Calendar Apps or RSS Readers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Thunderbird.
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Thunderbird iconThunderbird
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  • Mac
  • Windows
  • Linux
  • Homebrew
  • PortableApps.com
  • Chocolatey
  • Flathub
  • AppImageHub
  • Snapcraft
  • BSD
  • Haiku

Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is...

Learn more about Thunderbird

  1. eM Client icon

    eM Client

    • Mac
    • Windows
    65 alternatives to eM Client 

    eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts, notes and chat.

     Suggest and vote on features
    Features
    1.  Calendar IntegrationeM Client lets you sync your tasks and events with your calendar application.
    2.  Multiple Account supporteM Client support multiple accounts without the need to logout and login
    3.  PGP EncryptioneM Client supports PGP, an encryption system used for sending encrypted emails and files.
    4.  Dark ModeeM Client supports dark mode for comfortable usage in low light conditions.
    5.  Unified inboxView e-mails (or similar) from all accounts in one unified view with eM Client.
    6.  Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
    7.  Email OrganizereM Client allows you to take control of your inbox by filtering and control tools.
    8.  Sync with Google CalendareM Client can be synchronized with Google Calendar
    9.  Automatic BackupeM Client will automatically back up your data periodically.
    eM Client: Inbox view
    eM Client: Calendar - week view
    eM Client: Inbox with Agenda sidebar
    eM Client vs Thunderbird opinions
    Most users think eM Client is a great alternative to Thunderbird.
     all • positive • negative      relevance • date
    Guest

    Thunderbird is brutal, emClient is clean, neat, well thought out, etc. It works with Exchange, Gmail, etc. Everything in one install. Drop in replacement for Outlook at a fraction of the price for Business.

    Top positive comment ago
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    6
    Guest

    eM client is clean and neat, it's has more built-in functions than Thunderbird. This is a great alternative for Mac and Windows users who care about the software user interface.

    Top positive comment ago
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    0
    Guest

    limited to only 2 accounts

    Top negative comment ago
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    2
    Guest

    closed source program that doesn't do a lot of what thunderbird can

    Negative comment ago
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    -1
    LinuxDoge

    doesnt support Linux, isnt open source, not configurable enough

    Negative comment ago
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    0
    Guest

    Slow on rendering most email. My version of it doesn't show well unread new message : I can't tell if it's too slow or if it just fails to display them at all.

    Negative comment ago
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    3
    Guest

    I'm still testing it but I like what I see. The interface. I like balance, not minimalism nor clutter. I am still using Thunderbird and have not decided yet. Also it is for personal use, therefore I need a free program with at least 3 free mailboxes.

    Positive comment ago
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    -6
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    7 of 11 comments
  2. Claws Mail icon

    Claws Mail

    • Windows
    • Linux
    • BSD
    88 alternatives to Claws Mail 

    Claws Mail is an email client (and news reader), based on GTK+, featuring

    Quick response Graceful, and sophisticated interface Easy configuration, intuitive operation Abundant features Extensibility Robustness and stability.

     Suggest and vote on features
    Features
    1.  LightweightClaws Mail consumes less device resources compared to similar apps.
    2.  Extensible by Plugins/ExtensionsClaws Mail can be extended with add-ons, plugins and extensions.
    3.  Multiple Account supportClaws Mail support multiple accounts without the need to logout and login
    4.  No registration requiredYou can use most of the features in Claws Mail without registration.
    5.  Import/Export OPML FeedsImport and export your feed subscriptions into OPML format with Claws Mail.
    6.  Spam FilterClaws Mail can detect unsolicited, unwanted and virus-infected emails, calls, files, etc.
    7.  PortableClaws Mail can be used from a USB stick or similar with no prior installation.
    The main window
    The account preferences window
    Claws Mail vs Thunderbird opinions
    Most users think Claws Mail is a great alternative to Thunderbird.
    3psilon

    It's a good, lightweight alternative, but the UI is clunky and it misses HTML message composing. You have been warned!

    Top positive comment ago
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    14
    Guest

    Much faster than thunderbird which cloaks on weak machines.

    Top positive comment ago
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    6
    Guest

    very good alternative under linux. I can not say the same under windows since fancy plugin is very buggy.

    Positive comment ago
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    -1
    jodumont

    Despite the style, Claws is super fast and allow you to programs it with Perl and Python which is great for marketing automation.

    Positive comment ago
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    8
    Guest

    No HTML compose is the only reason I don't switch to it. We're not in 1980 anymore.

    Negative comment ago
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    14
    Guest

    Small and quick and not flooded with choices!

    Positive comment ago
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    2
    Guest

    I like it because of easily customizable key bindings.

    Positive comment ago
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    0


  3. Mailbird icon

    Mailbird

    65 alternatives to Mailbird 

    Mailbird helps individuals and businesses manage emails in one place. This allows you to simplify your workflows. Therefore, spend more time on important tasks. Moreover, 9 in 10 of our customers describe our interface as “intuitive” and beautiful.

     Suggest and vote on features
    Features
    1.  Dark ModeMailbird supports dark mode for comfortable usage in low light conditions.
    2.  Unified inboxView e-mails (or similar) from all accounts in one unified view with Mailbird.
    3.  Multiple Account supportMailbird support multiple accounts without the need to logout and login
    4.  Email template editorMailbird offers pre-defined email layouts so you can add content or customize your own templates.
    5.  Email OrganizerMailbird allows you to take control of your inbox by filtering and control tools.
    Screenshot
    Screenshot
    Screenshot
    Mailbird vs Thunderbird opinions
    Some users think Mailbird is a great alternative to Thunderbird, some don't.
    Guest

    Mailbird is missing most of the features which Thunderbird offers, like encryption and plugins

    Negative comment ago
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    9
    pasiojunk

    Clean interface, much faster than Thunderbird. One touch unsubcribe is a nice touch and adding new accounts is a breeze

    Positive comment ago
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    0
    thiztatyanarein

    asone user said "Mailbird is missing most of the features which Thunderbird offers, like encryption and plugins" more than year ago: now Thunderbird is dead, no development, no plugins (never was a lot and now even less as they are following the plan as to with Firefox. Is dead. Loved thunderbird, not a fan of Mailbird! but I can't stand oputlook

    Positive comment ago
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    -1
    Guest

    Great design. Great features

    Positive comment ago
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    0
  4. Microsoft Office Outlook icon

    Microsoft Office Outlook

    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    • Android Tablet
    • Windows Phone
    • iPad
    • Apple Watch
    • Android Wear
    134 alternatives to Microsoft Office Outlook 

    Microsoft Outlook, part of the Microsoft Office Suite (not to be confused with Microsoft Outlook Express), is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.

     Suggest and vote on features
    Features
    1.  Email OrganizerMicrosoft Office Outlook allows you to take control of your inbox by filtering and control tools.
    2.  Calendar IntegrationMicrosoft Office Outlook lets you sync your tasks and events with your calendar application.
    3.  Unified inboxView e-mails (or similar) from all accounts in one unified view with Microsoft Office Outlook.
    4.  Multiple Account supportMicrosoft Office Outlook support multiple accounts without the need to logout and login
    5.  Dark ModeMicrosoft Office Outlook supports dark mode for comfortable usage in low light conditions.
    6.  Email SchedulingYou can schedule a marketing, sales, or personal email for a time in the future with Microsoft Office Outlook.
    Outlook 365 on Windows
    Outlook for Mac 2016
    Outlook for Android
    Microsoft Office Outlook vs Thunderbird opinions
    Some users think Microsoft Office Outlook is a great alternative to Thunderbird, some don't.
    Guest

    It works. Much less buggy. Better integration with Windows. Encryption/Signing.Works over remote desktop without losing pieces of itself. Search is crappier though.

    Top positive comment ago
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    2
    Eyji

    As a Firefox user, I have tried to love Thunderbird but it just can't compete with Outlook, IMHO.

    Top positive comment ago
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    3
    LinuxDoge

    Not open source, not privacy-focused, no Linux support

    Top negative comment ago
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    0
    Guest

    outlook is clumsy and bloated and does nothing well. tbird does one thing and well.

    Negative comment ago
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    3
    Guest

    Outlook do not support RSS

    Negative comment ago
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    0
  5. Mailspring icon

    Mailspring

    • Mac
    • Windows
    • Linux
    • Arch Linux
    • Fedora
    • Ubuntu
    44 alternatives to Mailspring 

    Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro version adds read receipts, send later, reminders and more.

     Suggest and vote on features
    Features
    1.  Unified inboxView e-mails (or similar) from all accounts in one unified view with Mailspring.
    2.  Multiple Account supportMailspring support multiple accounts without the need to logout and login
    3.  Dark ModeMailspring supports dark mode for comfortable usage in low light conditions.
    4.  Ad-freeMailspring doesn't contain any form of external advertising.
    5.  Email OrganizerMailspring allows you to take control of your inbox by filtering and control tools.
    6.  Support for ThemesYou can use themes and templates to change the look and feel of Mailspring.
    7.  Extensible by Plugins/ExtensionsMailspring can be extended with add-ons, plugins and extensions.
    Clean design with integrated search and swipe gestures
    Built-in dark theme
    Advanced mailbox analytics
    Mailspring vs Thunderbird opinions
    This alternative is disputed. Mailspring is still a legitimate alternative to Thunderbird, but it might have issues that some users think are important.
    3psilon

    Great alternative, especially for casual users. Simple, streamlined UI, feels fresh.

    Top positive comment ago
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    1
    Guest

    Very simple, perfect IU and possibility to follow what happen to your emails.

    Top positive comment ago
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    -1
    Guest

    Need to create an account on a third-party company to access your email.

    Top negative comment ago
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    53
    Su900

    Unable to even find an address book or ability to import a csv file from previous mail client. You lose me when things are made so "modern-clean" that I have to consult a manual or Google things.

    Negative comment ago
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    0
    riskaasmara

    Simple, more streamlined UI and easily customizable.

    Positive comment ago
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    4
    peterbro

    nice interface (if you are talking about the feature, kcontact/kmail is the best, but this has a nice interface)

    Positive comment ago
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    -3
    bengotow

    Supports Linux and all IMAP providers, offers shortcut customization, extensible via plugins.

    Positive comment ago
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    -3


  6. SeaMonkey icon

    SeaMonkey

    • Mac
    • Windows
    • Linux
    • BSD
    • PortableApps.com
    240 alternatives to SeaMonkey 

    Web-browser, advanced e-mail, newsgroup and feed client, IRC chat, and HTML editing in one application. Itis built on the open source Mozilla Gecko engine, the same code which underlies Thunderbird and is the base for the Firefox browser.

     Suggest and vote on features
    Features
    1.  WYSIWYG SupportSeaMonkey integrates a WYSIWYG editor to edit the look and content of a document, page, or file.
    2.  LightweightSeaMonkey consumes less device resources compared to similar apps.
    3.  Privacy focusedSeaMonkey is considered a privacy friendly alternative.
    4.  PortableSeaMonkey can be used from a USB stick or similar with no prior installation.
    5.  Extensible by Plugins/ExtensionsSeaMonkey can be extended with add-ons, plugins and extensions.
    Linux version browser
    MacOS version browser
    W10 version browser
    SeaMonkey vs Thunderbird opinions
    Almost everyone thinks SeaMonkey is a great alternative to Thunderbird.
    Guest

    SeaMonkey is both a WEB BROWSER and EMAIL CLIENT. It's the successor of Mozilla Application Suite or Netscape Communicator, resp. Further it includes also a news client program, an HTML editor (SeaMonkey Composer) and an IRC client (ChatZilla).

    Positive comment ago
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    20
    Guest

    Unfortunately doesn't support synchronization with CardDAV address books.

    Negative comment ago
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    0
    apostolfaliagas

    It has all of Thunderbird's features and many more.

    Positive comment ago
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    14
    Guest

    More of a web browser than an email client

    Negative comment ago
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    -7
  7. Postbox icon

    Postbox

    • Mac
    • Windows
    70 alternatives to Postbox 

    Postbox is an email application that helps you organize your work life and get stuff done.

     Suggest and vote on features
    Features
    Screenshot
    Screenshot
    Screenshot
    Postbox vs Thunderbird opinions
    Most users think Postbox is a great alternative to Thunderbird.
    Bryan2k22

    You shouldn't call something that costs $80 as an alternative to something that is free.

    Positive comment ago
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    -1
    JackVegas

    If you're using Windows 10 or a Mac, Postbox is hard to beat. I found myself so impressed with the trial that I had to buy the license in the end.

    It started out looking a lot like Thunderbird, but it really has come into its own over the past few years to the point where Thunderbird has nothing on Postbox.

    Positive comment ago
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    -1
  8. Mutt icon

    Mutt

    • Mac
    • Windows
    • Linux
    • Xfce
    56 alternatives to Mutt 

    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...

     Suggest and vote on features
    Features
    1.  PGP EncryptionMutt supports PGP, an encryption system used for sending encrypted emails and files.
    2.  Command line interfaceMutt either have CLI support or is a CLI-only app.
    Screenshot
    Mutt vs Thunderbird opinions
    Most users think Mutt is a great alternative to Thunderbird.
    Guest

    Thunderbird users want a GUI mail application. Mutt is a command line mail application. They are both good and both popular, but very much apples and oranges.

    Negative comment ago
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    15
  9. Microsoft Mail and Calendar icon

    Microsoft Mail and Calendar

    • Windows
    • Windows S
    89 alternatives to Microsoft Mail and Calendar 

    Windows 10 has Mail and Calendar apps already built in.

     Suggest and vote on features
    Features
    1.  Unified inboxView e-mails (or similar) from all accounts in one unified view with Microsoft Mail and Calendar.
    Screenshot
    Screenshot
    Screenshot
    Microsoft Mail and Calendar vs Thunderbird opinions
    Most users think Microsoft Mail and Calendar is a great alternative to Thunderbird.
    kolappannathan

    It runs in background unlike Outlook and other email clients.

    Positive comment ago
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    1
  10. BlueMail icon

    BlueMail

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Apple Watch
    26 alternatives to BlueMail 

    BlueMail is a modern, mobile first, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP,Exchange,POP3.

     Suggest and vote on features
    Features
    1.  Unified inboxView e-mails (or similar) from all accounts in one unified view with BlueMail.
    2.  Ad-freeBlueMail doesn't contain any form of external advertising.
    3.  Calendar IntegrationBlueMail lets you sync your tasks and events with your calendar application.
    Screenshot
    Screenshot
    Screenshot
    BlueMail vs Thunderbird opinions
    Some users think BlueMail is a great alternative to Thunderbird, some don't.
    Guest

    It works on Android, but is not so powerfull.

    Positive comment ago
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    Guest

    clear, easy to use lots of flexibility

    Positive comment ago
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    -2
    Guest

    bluemail pushes all your mail into their clud making it insecure

    Negative comment ago
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    25
Showing 10 of 49 alternatives
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