Thunderbird for Android

Thunderbird for Android — K-9 Mail lineage with Thunderbird branding. Full documentation and source are on the official site and GitHub.

Developers and teams exploring lesser-known but maintained open source in this stack—suitable for learning, comparison, or adoption where license and support fit your needs.

• Finding tools that are actively maintained with public issue trackers
• Avoiding abandoned forks or unclear licensing
• Needing a real homepage plus repository for security or compliance review

1. Open https://www.thunderbird.net/mobile and follow the current quickstart or install guide.
2. Review the README and releases at https://github.com/thunderbird/thunderbird-android.
3. Pin versions in your dependency lockfiles for production.
4. Watch the repository for breaking changes and security advisories.