Thunderbird: Free Your Inbox

In-app purchases
10.4K reviews
Content rating
Rated for 12+
1M+
Downloads
Content rating
Rated for 12+
Parental Guidance Recommended
Users Interact, In-App Purchases
Learn more
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About this app

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

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

9.73K reviews
Ellie Kennard
September 15, 2026
There seems to be a bug in the app where JPG attachments have a .txt extension added. This gives something like photo.jpg.txt which file is not able to be viewed, obviously until it's downloaded and the .txt extension is removed by the user. It seems to be applied when the option to either download or view the file is chosen. That same file on the email on Windows Thunderbird does not have this problem, and if that email is forwarded to something like gmail, the attachment is normal.
45 people found this review helpful
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Mozilla Thunderbird
September 15, 2026
Thanks so much for reporting this, and we very much want to investigate this issue with JPG attachments further. Can you please open a bug report with any useful information at github.com/thunderbird/thunderbird-android/issues for our bug triage volunteers and developers? Thanks!
Michael Burns
July 4, 2026
Desktop version is great and I have used it since inception. The Android app is just a warmed over k9 mail, and still has all of k9's deficiencies. Two glaring ones are no support for filtering messages (for example to automatically sort incoming mail) and the other, related one, is no autoresponder support. The desktop version has excellent filteration and the filters can be used to set up autoresponses based on details of the message. A curious failure.
26 people found this review helpful
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Mozilla Thunderbird
July 7, 2026
Unfortunately the Android app doesn't support filters yet. This could be something we add in the future, though we don't know when. For now, please upvote and support requests for filters at connect.mozilla.org
Codey Jackson tax
August 20, 2026
this app has been a real let down so far. I'm a long time Thunderbird desktop user and I've been waiting on an Android version for years. I've been using this for a few months now and I'm about ready to go back to my phone's default email app. I'm constantly having emails not send and the UI really could be better. hopefully improvements come later.
2 people found this review helpful
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Mozilla Thunderbird
September 8, 2026
While we are working on improving and refactoring our message sync, be sure to check your app has unrestricted battery access to enable background sync! You can check this by long pressing the app icon, tapping the info icon, and tapping 'Battery'

What’s new

Thunderbird version 24.0

New:
- Signatures support HTML
- Reply offers Reply or Reply All

Changed:
- Long account names fit in two lines

Fixed:
- Compose selection invisible in light theme
- Status icons unreadable when selecting messages
- Recipient expander failed to collapse after edit
- Camera attachments could crash the app
- Save All saved each attachment with same file content
- HTML signatures could disappear after rotation
- Edit as new used wrong identity for queued mail