EFForg

    EFForg/rayhunter

    Rust tool to detect cell site simulators on an orbic mobile hotspot

    backend
    Rust
    GPL-3.0
    6.0K stars
    512 forks
    6.0K GitHub watchers
    Updated Oct 31, 2026
    View on GitHub

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    Where it stands

    Rank, growth pace and release cadence relative to everything GStars tracks.

    2 releases in the last 90 days, the latest 45 days ago, with 60 contributors on GitHub.

    Peaked at #15 in the weekly ranking the week of Dec 21, its best in the past year.

    Use Cases & Benefits

    • Detects IMSI catchers, also known as cell-site simulators or stingrays, on mobile hotspots using Rust.
    • Minimizes false positives while being easy to install and use regardless of technical skill level.
    • Use for monitoring mobile hotspot networks to identify unauthorized cellular surveillance devices.
    • Use for enhancing personal or organizational mobile security by detecting potential spying equipment.
    • Use for research and community-driven development to support detection on various compatible devices.

    Should you depend on it?

    License terms, project hygiene and risks, from GitHub metadata and GStars' snapshots.

    License

    GPL 3.0

    Copyleft: distributing software that includes it generally requires releasing your source under the same license.

    Community files

    • README: present
    • Contributing guide: present
    • Code of conduct: present

    Watch-outs

    • GPL-style copyleft: including it in distributed software generally requires releasing your source under the same license.

    General guidance from repository metadata, not legal advice. How we score

    From the README

    Rayhunter is a project for detecting IMSI catchers, also known as cell-site simulators or stingrays. It was first designed to run on a cheap mobile hotspot called the Orbic RC400L, but thanks to community efforts can support some other devices as well. It's also designed to be as easy to install and use as possible, regardless of your level of technical skills, and to minimize false positives.

    → Check out the installation guide to get started.

    → To learn more about the aim of the project, and about IMSI catchers in general, please check out our introductory blog post.

    → For discussion, help, or to join the mattermost channel and get involved with the project and community check out the many ways listed here!

    → To learn more about the project in general check out the Rayhunter Book.

    LEGAL DISCLAIMER: Use this program at your own risk. We believe running this program does not currently violate any laws or regulations in the United States. However, we are not responsible for civil or criminal liability resulting from the use of this software. If you are located outside of the US please consult with an attorney in your country to help you assess the legal risks of running this program.

    Excerpt from the EFForg/rayhunter README on GitHub (GPL-3.0 license). © its authors.Read the full README on GitHub

    Daily snapshots

    Stars gained per day, and how forks and open issues moved, from GStars' daily snapshots

    Aug 7: +11Aug 8: +8Aug 16: +31Aug 17: +6Aug 20: +12Sep 3: +4

    +589 stars over 87 days across 14 snapshot days; best day +31 on Aug 16.

    Forks

    512+62

    Open issues

    97+5

    Compared with peers in Backend

    Fastest-growing repositories GStars tracks in this cohort for the week of Nov 1, by 7-day star growth

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