Thunderbird Beta for Testers

In-app purchases
1.82K reviews
Content rating
USK: All ages
100K+
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Content rating
USK: All ages
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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
Oct 6, 2026
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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
Janis Jansen
January 27, 2026
Using it as my main client for personal and work for about a year and will continue to do so! Some super nice features, but it is quite minimal. My top 1 wish would be a "unified spam" folder. or customizable combined folders in general. the combined inbox is awesome. Syncing config with desktop is awesome. Negatives: Push notifications are limited and since a few updates I have the issue that I cannot mark mails as read or delete them after I opened one mail. works normally after restart.
9 people found this review helpful
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INTJ Engineering
October 15, 2024
👌😬 Some feedback, though: - we have a unified inbox folder, but please allow for unified spam/junk, and sent folder. I've been having to open Outlook to check the unified spam and sent folders. Here we have to individually go to the corresponding email account, open the menu and then click on spam, or sent, etc. - that unread emails have a different background should be the default option - There should be a shorter option, like 5min for sync. We need to promptly address some stuff sometimes.
9 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!

What’s new

Thunderbird version 25.0b1

New:
- New funding appeal helps keep Thunderbird alive!
- Feature flags can be updated without app updates

Fixed:
- Deleted email notifications could reappear
- HTML signature text disappeared after rotation
- HTML drafts could hide or lose attachments
- Add to contacts crashed without a Contacts app
- Large PGP attachments showed no encryption progress
- Account drawer could behave inconsistently
- Acccount drawer controls blocked content on small displays