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Microsoft Outlook Alternatives for Windows

There are many alternatives to Microsoft Office Outlook for Windows if you are looking for a replacement. The best Windows alternative is Thunderbird, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Microsoft Office Outlook and loads of them are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to Microsoft Office Outlook are Mailbird, eM Client, Mailspring and Claws Mail.

Microsoft Office Outlook alternatives are mainly Email Clients but may also be Calendar Apps or Todo List Managers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Microsoft Office Outlook.
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Microsoft Outlook, part of the Microsoft Office Suite (not to be confused with...

Learn more about Microsoft Office Outlook

  1. Thunderbird icon

    Thunderbird

    • Mac
    • Windows
    • Linux
    • Homebrew
    • PortableApps.com
    • Chocolatey
    • Flathub
    • AppImageHub
    • Snapcraft
    • BSD
    • Haiku
    96 alternatives to Thunderbird 

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

     Suggest and vote on features
    Features
    1.  Extensible by Plugins/ExtensionsThunderbird can be extended with add-ons, plugins and extensions.
    2.  Multiple Account supportThunderbird support multiple accounts without the need to logout and login
    3.  Calendar IntegrationThunderbird lets you sync your tasks and events with your calendar application.
    4.  Email OrganizerThunderbird allows you to take control of your inbox by filtering and control tools.
    5.  Dark ModeThunderbird supports dark mode for comfortable usage in low light conditions.
    6.  Support for ThemesYou can use themes and templates to change the look and feel of Thunderbird.
    7.  Integrated Password ManagerThunderbird lets you access all the passwords you’ve saved across your different devices.
    8.  Import/Export OPML FeedsImport and export your feed subscriptions into OPML format with Thunderbird.
    9.  PortableThunderbird can be used from a USB stick or similar with no prior installation.
    Screenshot
    Dark Mode
    Mail Account Setup Wizard
    Thunderbird vs Microsoft Office Outlook opinions
    Most users think Thunderbird is a great alternative to Microsoft Office Outlook.
     all • positive • negative      relevance • date
    Guest

    Seems to be more secure than Microsoft alternatives and more easily updatable.

    Top positive comment ago
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    12
    JohnFastman

    Despite its age, Thunderbird remains the most fully featured email client out there. Various add-ons can extend its functionality, it (now) has a built in calendar and, unlike Outlook, it's free, open source and respects your privacy.

    Top positive comment ago
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    10
    Guest

    The interface is just impossible for many people to use.

    Top negative comment ago
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    14
    s0raz

    I would rather Thunderbird over Outlook because it's open source.

    Positive comment ago
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    Guest

    I transitioned all ove my computers from Windows to Linux. I had 4 computers so I used four different distributions with different linux bases, Debian and Arch. Thunderbird worked perfectly. The email client is awesome, I think they should devote more development efforts to calender and task management integration.

    Positive comment ago
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    2
    sangwenobdi

    It can access email server just as outlook

    Positive comment ago
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    1
    Can202

    ThunderBird es la mejor alternativa open source, ya que puedes personalizarlo, mi recomendación es usar la extención CheckBox, Thunderbird junto a CheckBox (extensión), la mejor APP para Mail

    Positive comment ago
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  2. 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
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    Mailbird vs Microsoft Office Outlook opinions
    Almost everyone thinks Mailbird is a great alternative to Microsoft Office Outlook.
    Guest

    These are email clients not replacements for outlook

    Negative comment ago
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    -10
    Guest

    Not enough functionality. No smart attachment feature, no quick sort by address or flags or attachments etc. Not really a business email client

    Negative comment ago
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    -1


  3. 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 Microsoft Office Outlook opinions
    Most users think eM Client is a great alternative to Microsoft Office Outlook.
    Guest

    Supports 365 Shared Mailboxes.

    Top positive comment ago
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    0
    Guest

    One of the only fully integrated email and calendar solutions that supports Office365, Exchange, Outlook, Gmail, GSuite, POP, and IMAP. Good performance and usability.

    Top positive comment ago
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    1
    Guest

    It has all features like Outlook: tasks, calendar, mail, .... good design, ...

    Positive comment ago
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    2
    hellih

    It is not very overcomplicated! Very simple, but functional design. therefore also very easy to set up and use.

    Positive comment ago
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    0
    logicbrick

    A nicer, less cluttered version of outlook. Biggest advantage is ease of navigation and use. E.g. you can view all mail and calendars in a single combined view, without tampering with any settings. Similarly, the tasks view is also very capable. Added to this, the support team are very responsive and helpful.

    Positive comment ago
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    -2
  4. 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 Microsoft Office Outlook opinions
    Most users think Mailspring is a great alternative to Microsoft Office Outlook.
    Guest

    Speed of work, good connection to the mail server, speed search.

    Positive comment ago
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    Guest

    Beautiful theme options with custom designed themes available. I tried thunderbird a few times but always came back to mailspring. I LOVE the "views" feature that shows you how many times an email was opened and if it was forwarded by the recipient!

    Positive comment ago
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    0
  5. 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 Microsoft Office Outlook opinions
    pros, cons and recent comments
    Guest

    Claws Mail is email only, does not have many of the features of Outlook. Displaying HTML mail is sketchy at best.

    Negative comment ago
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    -2


  6. 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 Microsoft Office Outlook opinions
    Most users think Microsoft Mail and Calendar is a great alternative to Microsoft Office Outlook.
    coryroberts

    Really minimal functionality, does not even support Rules for Office 365 email addresses.

    Negative comment ago
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    Guest

    Bundled in win 10 and very simple to use. Great if you just read mail.

    Positive comment ago
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    1
  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.

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    Features
    Screenshot
    Screenshot
    Screenshot
    Postbox vs Microsoft Office Outlook opinions
    Some users think Postbox is a great alternative to Microsoft Office Outlook, some don't.
    Guest

    for Office 365 only sync inbox

    Negative comment ago
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    0
  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 Microsoft Office Outlook opinions
    pros, cons and recent comments
    Guest

    It's a console based application without proper calendar support. A key feature of outlook

    Negative comment ago
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    1
    scholasticphilosopher

    Powerful configuration is possible with mutt, and vim in the terminal.

    Positive comment ago
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    -1
    Guest

    mutt is email only, terminal based.

    Negative comment ago
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    -1
  9. Spike icon

    Spike

    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Software as a Service (SaaS)
    • Oculus Rift
    64 alternatives to Spike 

    Bring your workspace together into one unified app. It’s everything your team has been looking for in a productivity and messaging app, but easier, and all with your email. Welcome to the shortest path to done.

     Suggest and vote on features
    Features
    1.  Unified inboxView e-mails (or similar) from all accounts in one unified view with Spike.
    2.  Dark ModeSpike supports dark mode for comfortable usage in low light conditions.
    3.  Email OrganizerSpike allows you to take control of your inbox by filtering and control tools.
    4.  Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
    5.  Multiple Account supportSpike support multiple accounts without the need to logout and login
    6.  RemindersSpike allows you to set reminders for tasks, events or actions, based on parameters of time, place or condition.
    7.  Real time collaborationMultiple users can work together in Spike simultaneously.
    8.  Live PreviewInstantly see what your files and documents look like as you create them.
    One powerful space for all your work needs—get email, chat, notes, tasks, calendar and audio/video calls all from your inbox
    The only email platform that helps teams of all sizes meet, collaborate and get work done from anywhere.
     Create group chats and easily share files and docs for any project or purpose, with everyone on your team.
    Spike vs Microsoft Office Outlook opinions
    pros, cons and recent comments
    Guest

    Brings all of my communications into one place. Also allows for easier sending, saving, and sharing of files shared amongst my teams.

    Positive comment ago
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    0
  10. EssentialPIM icon

    EssentialPIM

    • Windows
    • Android
    • iPhone
    215 alternatives to EssentialPIM 

    The powerful, full-featured Personal Information Manager for Windows offering Email, Synchronization, Portability, Network support, Android and iOS versions.

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    Features
    1.  PortableEssentialPIM can be used from a USB stick or similar with no prior installation.
    Screenshot
    Screenshot
    Screenshot
    EssentialPIM vs Microsoft Office Outlook opinions
    Most users think EssentialPIM is a great alternative to Microsoft Office Outlook.
    Guest

    Tricky to configure. Does not speak MAPI, but many Cloudservices. I was not successful to synchronize OwnCloud

    Positive comment ago
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    -1
Showing 10 of 64 alternatives
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