Best Thunderbird Alternatives in 2021

    Thunderbird is described as 'free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox' and is one of the leading apps in the News & Books category. There are more than 50 alternatives to Thunderbird for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is K-9 Mail, which is both free and Open Source. Other great apps like Thunderbird are eM Client (Freemium), Evolution (Free, Open Source), Feedly (Freemium) and Claws Mail (Free, Open Source).

    This page was last updated Jun 24, 2021

      • FreeOpen Source
      • Android
      Free Software, minimalistic and privacy friendly email app for Android.
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      • FreeOpen Source
      • Linux
      Historically, Iceape was a re-branding of SeaMonkey by the Debian project. However, Debian discontinued Iceape in December 2013 citing security concerns and lack of a maintainer.
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      • FreeProprietary
      • iPhone
      • iPad
      • Android SDK
      A full-featured personal information manager that can help you manage your life. Use it to keep track of contacts, tasks, appointments, to-do lists, birthdays, and more.
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      • Windows
      The email fun continues... Import your IncrediMail Stationery, E-Cards, E-Mails and Contacts.
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    1. Historically, Icedove was a re-branding of Thunderbird by the Debian project, with minimal modifications, in order to resolve branding disputes. Debian since discontinued Iceweasel in February of 2017 after reaching an agreement with Mozilla over the use of it's trademark.
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      • Mac
      • Zoho Mail
      Multi-Account Zoho client for Mac.
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      • FreeOpen Source
      • Linux
      Experimental terminal mail client aiming for configurability and extensibility with sane defaults.
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      • FreeProprietary
      • Online
      • Software as a Service (SaaS)
      Take back control of your Inbox Set and forget Gmail plugin to automatically snooze emails till a certain time of day or week 1. Snooze Newsletters till Saturday - Declutter your Inbox by scheduling newsletters for Saturday morning
    2. Email Insights is a Microsoft Garage project, a lightweight email client to get to your emails faster. It provides guided search in the form of superfast autocomplete, spell correct and fuzzy name search which means that users do not have to type out everything.
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    Showing 89 of 89 alternatives