Thunderbird: Free Your Inbox

In-app purchases
3.8
4.97K reviews
500K+
Downloads
Content rating
Everyone
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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.

Updated on
Jul 15, 2025

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

3.8
4.68K reviews
Ingo N.
November 2, 2024
I used to use Thunderbird on my desktop way back. On my phone I used GMail for years. Thunderbird is SO MUCH better! It's small. It's fast! It's open source. It's actually deleting when you select to delete which was a problem with the Gmail app where emails would still be there when I check the account on the computer later. I am so glad my favorite Thunderbird is now on Android! Thank you!
207 people found this review helpful
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Walter
July 25, 2025
Useless reply. Long time K9 user and was happy with Thunderbird 10.0. The 10.1 update broke all notifications. I can manually check for new email, but no longer get any notifications. Please fix, and don't mess up K9 please. edit: Thanks for the advice. Push works with an annoying notification. Doesn't change that Sync stopped. Still a Mozilla on desktop fan, but your android attempt blows. updated rating lower. You broke it, you fix it. Tech bros ruined another app. FairEmail is free.
2 people found this review helpful
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Mozilla Thunderbird
July 24, 2025
We're so sorry this has happened! Please double check your settings at Settings > Get Help > Settings > "Configure push..." to see if anything accidentally changed. If this doesn't help, please click on 'Ask a Question' on the right side of the article so we and our community can help figure out what's going on!
d p
July 24, 2025
i thought i liked this email client at first, but not so much now. I've been intermittently getting error messages saying that the message failed to send when I'm trying to email attachments. they sit in the outbox, and then i open it, and it says message deleted, or sometimes it just removes the attachment after sending. since this is for work, i can't afford the time to troubleshoot why this keeps happening, so I'm moving on.
4 people found this review helpful
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What’s new

Thunderbird for Android version 10.1, based on K-9 Mail. Changes include:
- Attach all images when sharing from gallery, not just the last
- Show the full changelog when it contains special characters