Threema Libre
Threema Libre is a free, open-source messaging app for Android. Secure and private messaging. It has 998 GitHub stars and is released under the AGPL-3.0-only license, and you can install it from F-Droid.
- Official
- Android
- Kotlin
- Messaging & chat
- Actively maintained
About Threema Libre
NOTE: A Threema Shop license is required, please visit: to get one. Threema is the world’s best-selling secure messenger, used by more than 12 million people in over 175 countries, developed in Switzerland, and designed with privacy and data protection in mind. Whether chats, calls, or files, everything is end-to-end encrypted, and no data trail is left behind. Instead of a phone number or email address, a randomly generated Threema ID serves as a unique identifier – anonymous and secure. Threema protects what really matters: your privacy. In contrast to the version distributed via Google Play, Threema Libre contains no proprietary libraries / components (like Google Play Services).
Privacy and F-Droid
F-Droid builds Threema Libre from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
- Relies on a non-free network service
- Depends on the developer's own network service
Screenshots
Screenshots from the app's F-Droid listing.
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What is Threema Libre?
Threema Libre is a free, open-source messaging app for Android. Secure and private messaging. It has 998 GitHub stars and is released under the AGPL-3.0-only license, and you can install it from F-Droid.
Is Threema Libre free and open source?
Yes. Threema Libre's source code is public on GitHub under the AGPL-3.0-only license, which is OSI-approved or FSF-free. F-Droid flags these anti-features on its latest build: relies on a non-free network service; depends on the developer's own network service.
How do I install Threema Libre?
You can install Threema Libre from F-Droid (package ch.threema.app.libre); the links are on this page.
Is Threema Libre still maintained?
The repository's most recent commit was on Sep 23, 2026. Its F-Droid listing was last updated on Sep 25, 2026. appsgit only lists apps whose repository had a commit in the last six months.