Thunderbird Beta for Testers

In-app purchases
1.82K reviews
Content rating
Parental guidance
100K+
Downloads
Content rating
Parental guidance
Parental Guidance Recommended
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About this app

Help make the next Thunderbird release as awesome as possible by downloading Thunderbird Beta and getting early access to the latest features and bug fixes before they're officially released. Your testing and feedback are important, so please report bugs, rough edges, and share your thoughts with us!

Find our bug tracker, source code, and wiki at https://github.com/thunderbird/thunderbird-android.

We’re always happy to welcome new developers, designers, documenters, translators, bug triagers and friends. Visit us at https://thunderbird.net/participate to get started.

What you can do
Thunderbird is a powerful, privacy-focused email app. Effortlessly manage multiple email accounts from one app, with a Unified Inbox option for maximum productivity. Built on open-source technology and supported by a dedicated team of developers alongside a global community of volunteers, Thunderbird never treats your private data as a product. Supported solely by financial contributions from our users, so you never have to see ads mixed in with your emails again.

What you can do



  • Ditch multiple apps and webmail. Use one app, with an optional Unified Inbox, to power through your day.

  • Enjoy a privacy-friendly email client that never collects or sells your personal data. We directly connect you to your email provider. That’s it!

  • Take your privacy to the next level by using OpenPGP email encryption (PGP/MIME) with the “OpenKeychain” app, to encrypt and decrypt your messages.

  • Choose to sync your email instantly, at set intervals, or on-demand. However you want to check your email, it’s up to you!

  • Find your important messages using both local and server-side search.



Compatibility



  • Thunderbird works with IMAP and POP3 protocols, supporting a wide range of email providers, including Gmail, Outlook, Yahoo Mail, iCloud, and more.



Why use Thunderbird



  • The trusted name in email for over 20 years - now on Android.

  • Thunderbird is fully funded by voluntary contributions from our users. We don’t mine your personal data. You are never the product.

  • Made by a team that is as efficiency-minded as you are. We want you to spend minimal time using the app while getting maximum in return.

  • With contributors from all over the world, Thunderbird for Android has been translated into more than 20 languages.

  • Supported by MZLA Technologies Corporation, a wholly owned subsidiary of the Mozilla Foundation.



Open Source and Community



  • Thunderbird is free and open source, which means its code is available to see, modify, use and share freely. Its license also ensures that it will be free forever. You can think of Thunderbird as a gift from thousands of contributors to you.

  • We develop in the open with regular, transparent updates on our blog and mailing lists.

  • Our user support is powered by our global community. Find the answers you need, or step into the role of a contributor - whether it’s answering questions, translating the app, or telling your friends and family about Thunderbird.

Thunderbird is a 100% open source, privacy focused email app.
Updated on
Sep 14, 2026
Featured stories

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Personal info, Messages and 7 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

1.72K reviews
Vijay Lalwani
October 23, 2024
It's great to finally use it as an app after years on desktop! Love the team's rapid progress. A few beta nitpicks: 1. Account colour changes in settings don't apply until I restart the app. 2. Notifications take too long—15 minutes is too much. 3. IMAP folders require clicking "load 100 more" for each folder. Emails should load automatically. I tried it on perosnal hosted, Gmail, and Outlook. Is this the right place for bug reports? If not, could you add an action button to report them?
10 people found this review helpful
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Rick Jones
February 20, 2025
Just switched to using this full-time as my old tried & trusted app has lost support. Generally OK, but some major UI issues: 1. In the message list, there is no indication if the item is a single message or a thread. You have to open it to find out - terrible. 2. It doesn't support folder hierarchy, AFAICS. I have a deep hierarchy of hundreds of folders, but all I'm offered is a flat list with "/" embedded in the names. This is not helpful. K9 has been around for ages, should be better by now.
19 people found this review helpful
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Mozilla Thunderbird
February 20, 2025
Thanks for the feedback, and if you go to Settings > Display, you can turn on Threaded view. We are prioritizing improvements to folder organization for this year, so look for changes coming on that front. Thanks for your patient and we hope you stick with us, and maybe even help test new features in the beta!
Greg L
September 13, 2026
Overall it's a great experience. The unified inbox works well, but I have to ask... Why is there no unified outbox because it takes quite a few Presses to get from my unified inbox to the specific outbox that I'm looking for When I'm trying to pull up an email that I have previously sent. For that matter, why not incorporate a unified trash and spam as well.
2 people found this review helpful
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Mozilla Thunderbird
September 14, 2026
Thanks so much for helping test the Beta app, which improves everyone's experience! And we do have plans to add more folders to the Unified Account, but this work depends on the current re-architecture work that will make this feature much easier to add.

What’s new

Thunderbird version 24.0b2

Fixed:
- Attachment filenames with non-ASCII characters were incorrectly decoded and saved
- HTML signature text could disappear after rotating the screen
Content rating
Parental guidance
Parental Guidance Recommended
Users Interact
Learn more

App support

About the developer
MZLA TECHNOLOGIES CORPORATION
mobile-appstore-admin@thunderbird.net
447 Sutter St San Francisco, CA 94108-4601 United States
+1 650-910-8704

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