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thunderbird

thunderbird/thunderbird-android

Open-source Android email client from Thunderbird that manages multiple accounts in one app, with a Unified Inbox option.

Open-source alternative to:GmailOutlook

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What is it?

Thunderbird for Android is an email app for Android focused on privacy. It lets you manage several email accounts from a single interface and offers a Unified Inbox that combines messages from all of them.

The project is based on K-9 Mail, which joined the Thunderbird family in 2022, and the two apps share the same code base. Thunderbird for Android is developed by the Thunderbird team with help from volunteer contributors, and it is distributed through Google Play, F-Droid, GitHub Releases and a beta channel.

The repository is written in Kotlin and licensed under Apache-2.0. It includes contribution guides, engineering documents covering RFCs, technical designs and architecture decisions, and a Weblate-based translation workflow.

Key features

  • 01Manage multiple email accounts in one app
  • 02Unified Inbox combines messages from all accounts
  • 03Available on Google Play, F-Droid and GitHub Releases
  • 04Beta channel for trying features early
  • 05Can import settings from K-9 Mail

Use cases

  • Reading work and personal email accounts on an Android phone in one place
  • Replacing a closed-source mail client with an open-source, privacy-focused alternative
  • Contributing to an open-source Android app written in Kotlin

Quick start

  1. 1

    Install Thunderbird from Google Play or F-Droid

  2. 2

    Or download the APK from the GitHub Releases page

Things to know

  • Android only; there is no desktop or iOS version.

In collections

Privacy & local-first toolsAndroid apps & phone tools

Topics

#email#android#kotlin#privacy#mobile-app#imap#communication#mozilla

FAQ

What is thunderbird-android?
Open-source Android email client from Thunderbird that manages multiple accounts in one app, with a Unified Inbox option. Thunderbird for Android is an email app for Android focused on privacy. It lets you manage several email accounts from a single interface and offers a Unified Inbox that combines messages from all of them.
Is thunderbird-android free to use? What license does it have?
thunderbird-android is open source under the Apache-2.0 license. Check the license terms before using it in commercial products.
Is thunderbird-android still maintained?
Actively maintained. The last commit to thunderbird-android was on Nov 6, 2026.
What can I use thunderbird-android for?
Reading work and personal email accounts on an Android phone in one place Replacing a closed-source mail client with an open-source, privacy-focused alternative Contributing to an open-source Android app written in Kotlin
How do I install thunderbird-android?
Install Thunderbird from Google Play or F-Droid Or download the APK from the GitHub Releases page
Where can I get thunderbird-android?
The source code and installation instructions are on GitHub: https://github.com/thunderbird/thunderbird-android

Summary generated by AI from the project's README. GitHub stats refresh daily.

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