Thunderbird
Thunderbird is a free, open-source email app for Android. Thunderbird is a 100% open source, privacy focused email app. It has 14,068 GitHub stars and is released under the Apache-2.0 license, and you can install it from F-Droid and Google Play.
github.com/thunderbird/thunderbird-android (opens in a new tab)
- Official
- Android
- Kotlin
- Email clients
- Actively maintained
About Thunderbird
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.
Privacy and F-Droid
F-Droid builds Thunderbird from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
Screenshots
Screenshots from the app's F-Droid listing.
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What is Thunderbird?
Thunderbird is a free, open-source email app for Android. Thunderbird is a 100% open source, privacy focused email app. It has 14,068 GitHub stars and is released under the Apache-2.0 license, and you can install it from F-Droid and Google Play.
Is Thunderbird free and open source?
Yes. Thunderbird's source code is public on GitHub under the Apache-2.0 license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install Thunderbird?
You can install Thunderbird from F-Droid (package net.thunderbird.android) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: K9MAIL_24_0).
Is Thunderbird still maintained?
The repository's most recent commit was on Oct 7, 2026. Its F-Droid listing was last updated on Oct 6, 2026. appsgit only lists apps whose repository had a commit in the last six months.