The Best Mozilla Thunderbird Alternatives for Windows

Mitchell Baker, Mozilla’s Executive Chairwoman, announced Monday that Mozilla would prefer to stop supporting Thunderbird, their popular email client, as it represents a continuing “tax” on other development projects within Mozilla. She stated that it is constantly in competition for resources that the leadership feels should be “laser-focused on activities like Firefox that can have an industry-wide impact”.

It’s no secret that Firefox’s support has been waning in recent years. In a recent post about Mitchell Baker’s announcement, Ars Technica’s Andrew Cunningham wrote “Mozilla’s recent support for Thunderbird has been limited—it still receives security updates and basic changes imported from Firefox, but adding major features hasn’t been a priority for Mozilla for several years now despite some efforts from the development community. In fact, Thunderbird is currently only updated on Mozilla’s “extended support release” (ESR) schedule, originally implemented to help IT managers deal with Firefox and Thunderbird’s then-new rapid-release cycle.” Source

Since we anticipate many Mozilla Thunderbird users will be looking to switch to another email client, we compiled a review of some of the best email clients for Windows. Since Thunderbird is a downloadable program for PCs and Apple OS, we won’t be including purely online applications or mobile apps in this review.


The 3 Best Alternatives To Thunderbird:


Microsoft Office Outlook

source: Microsoft Office

Not to be confused with the webmail service, Microsoft Outlook, Microsoft Office Outlook is a feature packed powerhouse for enterprise users. It also boasts some of the best security features available in any email client, including office IT administrators to set permissions remotely, such as requiring a password lock screen for any mobile device with a corporate account.

Speaking of mobile devices, Office Outlook also includes companion apps that allow you to sync your emails, contacts, and more across all your devices.

If you need to do anything regarding emails, scheduling, managing contacts, Microsoft Office Outlook will probably have what you need. That being said, if you just want something to email and maybe schedule, this tool is going to be overkill for you. All that functionality is also not what you would call lightweight and, depending on your email retention settings, can take a bite out of slower PC’s performance.

Cost: $6.99/ Month for 1 PC or Mac & 1 Mobile Device more info here






You can think of Mailbird as the swiss army knife of email apps. Like Microsoft Office Outlook, we designed it to allow you to connect all your email accounts, manage your schedule, and organize contacts. However, unlike Outlook or Thunderbird, we included a lot of the communication tools you are probably already using elsewhere. Mailbird allows you to access your Facebook, Twitter, Evernote, and a growing list of other apps right alongside your emails.

Although it’s in the works, Mailbird does not come with any apps to check email on mobile devices.

You can think of Mailbird as a more consumer/normal user friendly version of Outlook. Sure, it incudes a ton of things like app integrations, tools, and so on. But, these are all features that can be activated or deactivated so you can focus on the tools you use, and not slow down your machine with those you don’t.

Mailbird also enjoys constant development updates and features. In fact, we are set to release a big update including features our users have been asking for just in time for the holidays.

Cost: Free, Pro, and Lifetime Plans available more info here





Source: Postbox


Are you just looking for  a clean (beautiful, thanks to the v4.0 update), easy to use email client? Maybe all you need is something to check a couple email accounts? Give Postbox a try. We were really impressed with the latest update to Postbox, and it has alot in common with Mailbird, including Evernote and Dropbox integration.

Like Mailbird, Postbox does not include any companion apps for mobile devices.

If Mailbird is a swiss army knife, Postbox is a pairing knife; designed with laser focus on managing your email accounts. That being said, there are a ton of similarities between Mailbird and Postbox. There are also some unique features to Postbox like a Favorites bar, and multiple tabs to help you organize your emails and accounts into groups.

Cost: $15 per user (Free trial available) more info here


Do you have another alternative to Mozilla Thunderbird you would like to share? We’d love to hear about it!

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  • realraven2000

    There is no need switching to Postbox – the code base of Thunderbird is still up to date (based on Gecko 38) and not 27 versions behind (AFAIK Postbox is based on Gecko 9.0). And development of Thunderbird is ongoing, and will be for the next couple of years, so I really don’t see why you would be looking for alternatives right now?

  • JustaNickname

    I am with eMClient. Does the job really well.


    Thunderbird development is still alive and the number of users is still growing. Thunderbird is the most secure and best messaging software, no raison to switch to another. Outlook ??? It’s a joke !

  • CoffeeExtremist

    I don’t understand why Mozilla doesn’t see the unique value of Thunderbird. I use 5 different browsers in Windows and Android, and for what I do, they are all pretty much interchangeable. If Firefox disappeared, I would miss it very little. But no other email client compares to Thunderbird in terms of versatility and extensibility. Why does Mozilla focus all it’s attention on a commodity product like its browser, while neglecting a truly unique and useful product like Thunderbird? If it’s money, I’ve said many times I would pay a montly subscription service fee for Thunderbird.

  • Daniel Winter

    The best email client for IMAP poweruses is TheBat. Insanely fast, too.

  • nemrut

    what are these ‘resources’ all doing at Mozilla. Firefox is crap, TB is the only thing worth their time right now.

  • sketch

    I wish they merge Thunderbird in Firefox just like Opera.

  • I want to download Thunderbird am disappointed to read this as seems a way better system. Will I be ok and updated downloading TB as I see most comments are year old.I have windows 10 ?

    • Christin Baumgarten

      Hey Keawi, this blog here from Mailbird about TB..In order to get the best and most accurate answer we would suggest you get in touch with TB. In the meantime, feel free to give us a try. We are constantly working on making Mailbird better and keep it updated all the time:-) Let me know if you have any questions:-)

      • Thanks will do, appreciate reply,

  • George Hamilton

    I’m willing to bet some other organization will pick TB up and keep it going. Sadly, it might be someone might turn it into freemium or fully pay based software. I hope not that, but I do hope it gets picked up by some open development gurus, maybe some of the FireFox people who worked on it under them…I don’t know.

    • Christin Baumgarten

      Thanks for your feedback George:-) Question is if TB wants to be bought up I guess…Have a great weekend and thanks for sharing your thoughts:-)

      • George Hamilton

        Isn’t TB open source? And doesn’t that mean anyone is already free to pick it up and run with it, even if they have to give it a new name (Phoenix Rising?). Not sure how the intellectual property stuff works,

  • Anyone but Obama

    Been trying to find out my passwords for Thundbird for months. Just can’t get to it. I follow instructions, but it’s nowhere to be found. I have to stop using TB because I can’t use it for my gmail account. Never had this problems many versions in the past. Nice job ‘improving’ with each version you effing morons.