Thunderbird AlternativesOnly apps categorised as Calendar Apps for Linux

There are many alternatives to Thunderbird for Linux if you are looking for a replacement. The best Linux Calendar App 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 seven of them are Calendar Apps available for Linux so hopefully you can find a suitable replacement. Other interesting Linux Calendar App alternatives to Thunderbird are Evolution, Betterbird, Zimbra Desktop and Orbit Communicator.

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Thunderbird alternatives are mainly Email Clients but may also be Calendar Apps or RSS Readers.  Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of Thunderbird.
Thunderbird iconThunderbird
  2394
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Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.

More about Thunderbird
Thunderbird alternatives page was last updated Nov 4, 2024
  1. Claws Mail icon
     100 likes

    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.

    78 Claws Mail alternatives
    The main window

    License model

    • FreeOpen Source

    Application types

    Platforms

    • Windows
    • Linux
    • BSD

    Top Claws Mail Features

    1.  Lightweight
    2.  Extensible by Plugins/Extensions
    3.  Multiple Account support
    4.  Spam Filter
    5.  No registration required
    6.  Ad-free
    7.  Privacy focused
    8.  Works Offline
    9.  Portable
    10.  Calendar Integration
    11.  GPG Encryption
    12.  Import/Export OPML Feeds
    Claws Mail iconThunderbird Icon

    Claws Mail VS Thunderbird

    Is Claws Mail a good alternative to Thunderbird?
     
    Comments about Claws Mail as an Alternative to Thunderbird
     
       
    Jonathan DUMONT

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

    Top positive commentAug 1, 2019
    9
    Guest

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

    Top negative commentSep 28, 2018
    18
    SViN

    I think most people are using gmail accounts or outlook accounts to access their emails. Claws supports Oauth2 to access said accounts but the implementation, is a complete PAIN.

    I can only realistically recommend something like this if your email provider is not forcing Oauth2.

    I would like for the devs to get to work into making the experience of setting up an account with oauth as painless as thunderbird.

    CommentSep 20, 2023
    1
    Show more comments
    3 of 8 comments
    Thunderbird Icon
    Claws Mail icon
    • Most users think Claws Mail is a great Thunderbird alternative.

    • Claws Mail is the most popular Windows & Linux alternative to Thunderbird.

    • Claws Mail is Free and Open SourceThunderbird is also Free and Open Source
    • Claws Mail is Lightweight and Privacy focusedThunderbird is not according to our users
  2. Evolution icon
     199 likes

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

    77 Evolution alternatives
    Mail

    License model

    • FreeOpen Source

    Application types

    Platforms

    • Linux
    • BSD
    • Flathub
    • S/MIME
    • GNOME
    • OpenPGP

    Top Evolution Features

    1.  Calendar Integration
    2.  Contacts
    3.  CalDAV Support
    4.  Calendar View
    5.  Ad-free
    6.  Spam Filter
    7.  Multiple Account support
    8.  Sync with Google Calendar
    9.  Extensible by Plugins/Extensions
    10.  Dark Mode
    11.  Works Offline
    12.  GPG Encryption
    Evolution iconThunderbird Icon

    Evolution VS Thunderbird

    Is Evolution a good alternative to Thunderbird?
     
    Comments about Evolution as an Alternative to Thunderbird
     
       
    Michel Th.

    I use both Thunderbird and Evolution, sometimes Claws-Mail. Evolution is the only one that can show the real "received" date in scams I have been receiving for months. In a today's scam Evolution shows "sent date" (falsified) 14-12-2019 and "received date" 30-01-2023 (evidently true). Thunderbird and Claws-Mail show 14-12-2019 in both columns.

    Top positive commentJan 30, 2023
    1
    Matthew Bulfinch

    As someone who is forced to use M365 at work (but ditching it at home, I let my subscription lapse) this is the closest visually to Outlook. That's important to me. The workflow is essentially identical.

    Positive commentOct 16, 2024
    0
    Syntevo GmbH

    Unfortunately, only available on Linux, not on Windows, not on MacOS. Otherwise promising.

    CommentNov 18, 2022
    1
    Show more comments
    3 of 5 comments
    Thunderbird Icon
    Evolution icon
    • Most users think Evolution is a great Thunderbird alternative.

    • Evolution is Free and Open SourceThunderbird is also Free and Open Source
  3. Betterbird icon
     40 likes

    Betterbird is a drop-in replacement for Mozilla Thunderbird. Betterbird has more features and more fixed bugs than Thunderbird.

    28 Betterbird alternatives
    Calendar view with custom thundirbird dark theme

    License model

    • FreeOpen Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • Chocolatey

    Top Betterbird Features

    1.  Multiple Account support
    2.  Privacy focused
    3.  Lightweight
    4.  Extensible by Plugins/Extensions
    5.  Unified inbox
    6.  Works Offline
    7.  Ad-free
    8.  Support for Themes
    9.  Portable
    10.  PGP Encryption
    11.  No Tracking
    12.  Spam Filter
    Betterbird iconThunderbird Icon

    Betterbird VS Thunderbird

    Is Betterbird a good alternative to Thunderbird?
     
    Comments about Betterbird as an Alternative to Thunderbird
     
       
    Sam Lander

    Betterbird does everything that Thunderbird does (it's a soft fork), while improving bugs and features.

    Because it's a soft fork, it retains the security implementations of Thunderbird.

    Thunderbird actually implements many of the bug fixes created by Betterbird, but at a much slower pace.

    Positive commentMay 31, 2023
    2
    HOT EARTH

    Its Thunderbird, just Better. No Import needed, as it uses the same profile Folder!

    Positive commentSep 5, 2022
    4
    Guest

    It has many fixes for long existing bugs

    Positive commentJun 20, 2024
    1
    Show more comments
    3 of 4 comments
    Thunderbird Icon
    Betterbird icon
    • Almost everyone thinks Betterbird is a great Thunderbird alternative.

    • Betterbird is Free and Open SourceThunderbird is also Free and Open Source
    • Betterbird is Privacy focused and LightweightThunderbird is not according to our users
  4. Zimbra Desktop icon
     32 likes

    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
    Zimbra Desktop screenshot 1

    License model

    • Free PersonalProprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Linux

    Zimbra Desktop Features

    1.  Email checker
    Zimbra Desktop iconThunderbird Icon

    Zimbra Desktop VS Thunderbird

    Is Zimbra Desktop a good alternative to Thunderbird?
     
    Comments about Zimbra Desktop as an Alternative to Thunderbird
     
    michael111

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

    Positive commentApr 15, 2019
    0
    Guest

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

    Positive commentDec 25, 2016
    -4
    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
  5. Orbit Communicator icon
     Like this app

    Orbit Communicator is a client server application that's designed to be deployed locally on your desktop machine. It currently provides an integrated email / calendaring experience based on external IMAP mail sources.

    7 Orbit Communicator alternatives
    Email with attachment browser

    License model

    • FreeProprietary

    Application types

    Platforms

    • Mac
    • Linux
    • Self-Hosted

    Top Orbit Communicator Features

    1.  Decentralized
    2.  Spam Filter
    3.  No registration required
    4.  Mail Filtering
    5.  Reminders
    6.  Email Organizer
    7.  No Tracking
    8.  Multiple Account support
    9.  Sync with Google Calendar
    10.  Recurring Tasks
    11.  Privacy focused
    12.  Ad-free
    Orbit Communicator iconThunderbird Icon

    Orbit Communicator VS Thunderbird

    Is Orbit Communicator a good alternative to Thunderbird?
     
  6. Mulberry icon
     8 likes

    Mulberry is a powerful, easy to use electronic mail (email) and calendar program that allows you to send, access, and manage email and calendars. Mulberry also helps you manage other related information, such as contact information.

    37 Mulberry alternatives
    Mulberry on Windows XP

    License model

    • FreeOpen Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux

    Mulberry Features

    1.  Calendar Sync
    2.  POP3 Support
    3.  CalDAV Support
    4.  IMAP Support
    Discontinued

    The project is no longer developed. Last version, 4.0.8, released in February 2007, can be still downloaded from the official website.

    Mulberry iconThunderbird Icon

    Mulberry VS Thunderbird

    Is Mulberry a good alternative to Thunderbird?
     
  7. Scribe Mail icon
     3 likes

    Scribe is a small portable email client with an intergrated contact database and calendar. It supports all the major internet mail protocols and uses international standards where possible. Scribe doesn't required installing or uninstalled and can be used from a removable...

    42 Scribe Mail alternatives
    Main window

    License model

    • FreeOpen Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Haiku

    Scribe Mail Features

    1.  Lightweight
    2.  Spam Filter
    3.  Extensible by Plugins/Extensions
    4.  Portable
    5.  Multiple languages
    6.  Cross-Platform
    Scribe Mail iconThunderbird Icon

    Scribe Mail VS Thunderbird

    Is Scribe Mail a good alternative to Thunderbird?
     
7 of 7 Thunderbird alternatives