Zerion
Zerion is a free, open-source messaging app for Android. Encrypted chats, calls and channels over Tor. It has 100 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid and Google Play.
About Zerion
Zerion is a private messenger. It runs over Tor, so your IP address stays hidden from the people you talk to and from the network itself. There's no phone number, no email, and no account on anyone's server. Your data lives encrypted on your own device, nowhere else. Everything is end-to-end encrypted with hybrid post-quantum cryptography: today's proven algorithms together with the new NIST quantum-resistant ones. Keys move forward with every message, so a key uncovered today cannot open yesterday's conversations. If large quantum computers arrive sooner than expected, what you sent in the past stays protected.
Privacy and F-Droid
F-Droid builds Zerion 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 Zerion?
Zerion is a free, open-source messaging app for Android. Encrypted chats, calls and channels over Tor. It has 100 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid and Google Play.
Is Zerion free and open source?
Yes. Zerion's source code is public on GitHub under the GPL-3.0-only 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 Zerion?
You can install Zerion from F-Droid (package com.professor.zerion) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: v3.0.16).
Is Zerion still maintained?
The repository's most recent commit was on Oct 7, 2026. Its F-Droid listing was last updated on Aug 26, 2026. appsgit only lists apps whose repository had a commit in the last six months.