Thunderbird: Free Your Inbox

In-app purchases
3.5
6.11K reviews
1M+
Downloads
Content rating
USK: All ages
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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
Oct 20, 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

3.6
5.74K reviews
Yves
July 25, 2025
testing alternatives to outlook. setting this up feels good, smooth and easy configuration. animations stutter whenever opening emails. buttons indicating my current mailbox are huge, seems out of proportion to the text size. would be great to have an option to choose custom fonts, or at least let the app use default system fonts for monospaced, body and display.
4 people found this review helpful
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Santiago Narvaez Rivas
December 6, 2024
So far it has been a smooth experience. I valued a lot the possibility to simply export the configuration from the Thunderbird desktop client, it really made my life easier. I'm just missing some features, like using a different color per account or adding an email signature. Edit: It turns out you can actually change the color and the signature. In settings, if you select a specific account, you access account specific settings. Thanks for pointing this out, I didn't notice before!
26 people found this review helpful
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Mozilla Thunderbird
December 6, 2024
Thank you so much for your review, and we're glad to hear it's been a smooth experience! You can set up a non-HTML signature in Account Settings > Sending Mail > Composition defaults, and upvote a suggestion to include HTML signatures on Mozilla Connect! https://connect.mozilla.org/t5/ideas/k-9-mail-html-sign/idi-p/71065
Daniel Velez
February 28, 2025
The App looks great. I have been a user of Thunderbird for desktop for many years and its great to have it in mobile. Found a big issue for me though; when opening a draft which is a reply (saved using desktop) all history is being converted to Plain-Text by the mobile editor, (not only the reply itself). It doesn't happen when creating the draft from the mobile app. Hope this issues can be improved sooner. Enjoying it so far!
3 people found this review helpful
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What’s new

Thunderbird for Android version 13.0, based on K-9 Mail. Changes include:
- Sync logging limited to 24 hours
- Client certificate not displayed in SMTP settings
- "Enable debug logging" did not provide verbose logging
- Scrolling short email could trigger left/right swipe
- Landscape scrolling only worked in center of some screens
- IMAP folder operations broken with prefixes
- HTML/table rendering display broken
- Application crashed opening placeholder folder