Thunderbird Alternatives

Alternatives list

1. 

   

   Sylpheed

    61 likes

   Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).

   Cost / License

   • Free
   • Open Source

   Application type

   • Email Client

   Origin

   • Japan

   Since

   • Since 2009

   Alerts

   • Discontinued

   Platforms

   • Windows
   • Mac
   • Linux
   • BSD
   • PortableApps.com

   • Japan

   

   

   

   +3

   

   More about Sylpheed  

   

   Good alternative?Is Sylpheed a good alternative to Thunderbird?

    

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   2comments

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   Discontinued

   The latest beta version is from September 2022.

   Sylpheed vs Thunderbird Comments

   Negative comment by Guest · Apr 6, 2019

   It doesn't encrypt password storage and doesn't have Master Password function

   Positive comment by locogato · Feb 13, 2026

   Sypheed has been my email client for some 15 years, but its more recent lack of updating has been worrisome -- and got to a head now, because my account requires OAuth and Sypheed does not cover that. With much regret I must look for something else.

   2 of 2 comments

   

   

   • Sylpheed is Free and Open SourceThunderbird is also Free and Open Source
   • Sylpheed is LightweightThunderbird is not according to our users
2. 

   

   Nextcloud Mail

    14 likes

   💌 Mail app for Nextcloud.

   Cost / License

   • Free
   • Open Source (AGPL-3.0)

   Application type

   • Email Client

   Origin

   • Germany
   • EU

   Since

   • Since 2018

   Platforms

   • Online
   • Self-Hosted
   • Nextcloud

   

   Good alternative?Is Nextcloud Mail a good alternative to Thunderbird?

    
4. 

   

   Mutt

    68 likes

   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...

   60 Mutt alternatives

   Cost / License

   • Free
   • Open Source

   Application type

   • Email Client

   Origin

   • United States

   Since

   • Since 2009

   Platforms

   • Windows
   • Mac
   • Linux
   • Xfce

   • United States

   

   More about Mutt  

   

   Good alternative?Is Mutt a good alternative to Thunderbird?

    

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   2comments

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   Mutt vs Thunderbird Comments

   Negative comment by Guest · Apr 21, 2020

   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 by Guest · Jul 5, 2025

   Mutt's a great email client for your terminal, not a GUI app like Thunderbird.

   2 of 2 comments

   

   

   • Mutt is Free and Open SourceThunderbird is also Free and Open Source
5. Ad

   

   

   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,...

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   Learn More
6. 

   

   Airmail

    74 likes

   Engineered for iOS, macOS, and watchOS, this fast mail client supports multiple account types, custom actions, Smart Inbox filtering, unified inbox, privacy mode, email scheduling, snooze, third-party app integration, flexible personalization, and advanced workflow tools.

   81 Airmail alternatives

   Cost / License

   • Paid
   • Proprietary

   Application type

   • Email Client

   Origin

   • Italy
   • EU

   Since

   • Since 2013

   Platforms

   • Mac
   • iPhone
   • iPad
   • Apple Watch

   • Italy
   • EU

   

   

   

   More about Airmail  

   

   Good alternative?Is Airmail a good alternative to Thunderbird?

    
7. 

   

   Zimbra Desktop

    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.

   58 Zimbra Desktop alternatives

   Cost / License

   • Free Personal
   • Proprietary

   Application typeApplication types

   • Email Client
   • Calendar

   Origin

   • United States

   Since

   • Since 2009

   Platforms

   • Windows
   • Mac
   • Linux

   • United States

   

   

   

   +3

   

   More about Zimbra Desktop  

   

   Good alternative?Is Zimbra Desktop a good alternative to Thunderbird?

    

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   2comments

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   Zimbra Desktop vs Thunderbird Comments

   Positive comment by michael111 · Apr 15, 2019

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

   Positive comment by Guest · Dec 25, 2016

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

   2 of 2 comments

   

   

   • Zimbra Desktop is Free Personal and ProprietaryThunderbird is Free and Open Source
9. 

   

   Wino Mail

    9 likes

   Wino is a lightweight native mail client for Windows 10/11. It is still in active development. Main motivation for this project is to replace Mail & Calendar for Windows with modern Windows design without using web technologies for speed.

   26 Wino Mail alternatives

   Cost / License

   • Freemium
   • Open Source (GPL-3.0)

   Application type

   • Email Client

   Origin

   • Türkiye

   Since

   • Since 2023

   Platforms

   • Windows

   • Türkiye

   

   

   

   +2

   

   More about Wino Mail  

   

   Good alternative?Is Wino Mail a good alternative to Thunderbird?

    
10. 

    

    aerc

     9 likes

    aerc is an email client that runs in your terminal. It's highly efficient and extensible, perfect for the discerning hacker.

    Cost / License

    • Free
    • Open Source

    Application type

    • Email Client

    Since

    • Since 2019

    Platforms

    • Linux

    

    

    More about aerc  

    

    Good alternative?Is aerc a good alternative to Thunderbird?

     
11. 

    

    ElectronMail

     24 likes

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

    Cost / License

    • Free
    • Open Source (GPL-3.0)

    Application type

    • Email Client

    Since

    • Since 2019

    Platforms

    • Windows
    • Mac
    • Linux
    • Debian
    • Ubuntu
    • Arch Linux
    • Raspberry Pi
    • Fedora
    • Electron
    • Linux Mint
    • +7 more

    

    More about ElectronMail  

    

    Good alternative?Is ElectronMail a good alternative to Thunderbird?

     

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    2comments

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    ElectronMail vs Thunderbird Comments

    Negative comment by Guest · Oct 3, 2019

    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.

    Negative comment by Guest · Oct 8, 2021

    It's only used for one provider

    2 of 2 comments

    

    

    • ElectronMail is Free and Open SourceThunderbird is also Free and Open Source
12. 

    

    The Bat

     52 likes

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

    62 The Bat alternatives

    Cost / License

    • Paid
    • Proprietary

    Application type

    • Email Client

    Origin

    • Moldova

    Since

    • Since 2009

    Platforms

    • Windows

    • Moldova

    

    

    

    +4

    

    More about The Bat  

    

    Good alternative?Is The Bat a good alternative to Thunderbird?

     
13. 

    

    Missive

     16 likes

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

    42 Missive alternatives

    Cost / License

    • Paid
    • Proprietary

    Application typeApplication types

    • Email Client
    • Team Collaboration

    Origin

    • Canada

    Since

    • Since 2016

    Platforms

    • Windows
    • Mac
    • Online
    • Android
    • iPhone

    • Canada

    

    

    

    +6

    

    More about Missive  

    

    Good alternative?Is Missive a good alternative to Thunderbird?

     
14. 

    

    myMail

     16 likes

    myMail is the smart email app for managing all your accounts on iOS and Android.

    35 myMail alternatives

    Cost / License

    • Free
    • Proprietary

    Application type

    • Email Client

    Origin

    • Russia

    Since

    • Since 2013

    Platforms

    • iPhone
    • iPad

    • Russia

    

    

    

    More about myMail  

    

    Good alternative?Is myMail a good alternative to Thunderbird?

     

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    1comment

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    myMail vs Thunderbird Comments

    Positive comment by Paul Karpo · Mar 25, 2019

    One of the best mobile email apps!

    1 of 1 comments

    

    

    • myMail is Free and ProprietaryThunderbird is Free and Open Source
15. 

    

    Trojitá

     17 likes

    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.

    Cost / License

    • Free
    • Open Source

    Application type

    • Email Client

    Origin

    • Czechia
    • EU

    Since

    • Since 2013

    Alerts

    • Discontinued

    Platforms

    • Windows
    • Linux

    • Czechia
    • EU

    

    

    

    More about Trojitá  

    

    Good alternative?Is Trojitá a good alternative to Thunderbird?