Microsoft Outlook Alternatives Filtered by 'Built-in RSS reader'

The best alternative to Microsoft Outlook 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 Outlook and six of them are so hopefully you can find a suitable replacement. Other interesting alternatives to Microsoft Outlook are Evolution, Betterbird, Claws Mail and The Bat.

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Microsoft Outlook alternatives are mainly Email Clients, but if you're looking for Calendar Apps or Contact Managers you can filter on that. Other popular filters include Linux, EU, Windows + Free, Open Source, Windows + Open Source, Android and iPad. 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 Microsoft Outlook.
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Alternatives list

  1. Thunderbird icon

    Thunderbird

     2559 likes

    Cross-platform email client supporting multiple identities, chat, and strong filtering. Extend functionality with add-ons like RSS/Atom feed readers and PGP support.

    87 Thunderbird alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • BSD
    • AppImageHub
    • Snapcraft
    • Flathub
    • PortableApps.com
    • F-Droid
    • Haiku
    • Homebrew
    • Chocolatey
    Thunderbird screenshot 1
     
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    15
    Thunderbird vs Microsoft Outlook Comments
    Top Positive Comment
    John Fastman
    12

    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 Negative Comment
    Guest
    15

    The interface is just impossible for many people to use.

    Review by a new / low-activity user.
    Shaz Shah
    Positive
    0

    I remember when I first used Thunderbird, many years ago, as I'd rather have a single interface for productivity. But the interface through me off and I never got on with the editor. Coming back to it now, it's fresher and smoother. Absolutely love it. In my opinion this is the only true alternative to Outlook. Then there's the bonus of extensions to further enhance it. Though, I'd like to see further improvements to the calendar integration.

    3 of 15 comments
    • Thunderbird is Free and Open SourceMicrosoft Outlook is Paid and Proprietary
    • Thunderbird is Customizable and Privacy focusedMicrosoft Outlook is not according to our users
  2. Evolution icon

    Evolution

     207 likes

    Evolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality.

    71 Evolution alternatives

    Cost / License

    Application types

    Platforms

    • Linux
    • BSD
    • Flathub
    • S/MIME
    • GNOME
    • OpenPGP
    Mail
     
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    6
    Evolution vs Microsoft Outlook Comments
    Top Positive Comment
    Guest
    2

    It runs on Linux and you still have content if you are offline.

    Review by a new / low-activity user.
    gifford
    Positive
    0

    I can just find everything instantly, Outlook I'm having to go to Chat GPT to research where the option is hidden!

    Guest
    Positive
    -1

    This would be the best alternative, except that it requires the Gnome desktop, so users of other desktop environments need to look elsewhere.

    Review by a new / low-activity user.
    3 of 6 comments
    • Evolution is Free and Open SourceMicrosoft Outlook is Paid and Proprietary
  4. Betterbird icon

    Betterbird

     79 likes

    Betterbird, a soft fork of Mozilla Thunderbird, improves user experience with advanced features, bug fixes, security patches, and multi-row descriptions similar to Outlook. Compatible with multiple platforms and can be used alongside Thunderbird, sharing the same profile.

    30 Betterbird alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • Chocolatey
    Betterbird screenshot 1
     
  5. Claws Mail icon

    Claws Mail

     106 likes

    Email and news client on GTK+ foundation featuring quick performance, extensible plugins, secure protocols, advanced filtering, strong folder and contact management, lightweight design, powerful search, customizable interface, multi-language support, and encryption.

    64 Claws Mail alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Windows
    • Linux
    • BSD
    The main window
     
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    1
    Claws Mail vs Microsoft Outlook Comments
    Guest
    Negative
    -2

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

    Review by a new / low-activity user.
    • Claws Mail is Free and Open SourceMicrosoft Outlook is Paid and Proprietary
    • Claws Mail is Lightweight, Customizable and Privacy focusedMicrosoft Outlook is not according to our users
  6. The Bat icon

    The Bat

     51 likes

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

    54 The Bat alternatives

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Windows
    The Bat screenshot 1
     
  7. Koma-Mail icon

    Koma-Mail

     4 likes

    Koma-Mail is an email client which is comfortable and has very handy functions. It does not need an installation, so that you can run Koma-Mail from your flash drive but, of course, also on your desktop.

    Cost / License

    • Free
    • Proprietary

    Application types

    Alerts

    • Discontinued

    Platforms

    • Windows
    Koma-Mail screenshot 1
     
6 of 6 Microsoft Outlook alternatives