# EFForg/rayhunter

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

Repository: https://github.com/EFForg/rayhunter
Canonical: https://ross.abutalabs.com/products/rayhunter
Homepage: https://efforg.github.io/rayhunter/
Language: Rust
License: GPL-3.0
License Family: copyleft
Last push: 2026-08-24T14:23:20+00:00

## Health v2 (maintenance only)
Score: 93/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 96, longevity 73
- inputs: {"age_days": 1029, "days_push": 9, "days_rel": 30, "gap_med": 19, "n_releases_24m": 30}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5688, forks 469 (observed 2026-08-28T04:09:27.907869+00:00)

## What it is
Rayhunter is an EFF-developed Rust tool that detects IMSI catchers (cell-site simulators, also known as stingrays) used for cellular surveillance. It runs primarily on the cheap Orbic RC400L mobile hotspot and other community-supported devices, designed for easy installation regardless of technical skill.

## Use cases
- detect IMSI catchers in my area
- check if my cell traffic is being intercepted by a stingray
- monitor for cell site simulators while traveling
- detect cellular surveillance on a mobile hotspot
- find out if police surveillance devices are tracking my phone
- run cellular spy detection on cheap hardware

## When to choose
- you want an affordable, dedicated hardware device for IMSI catcher detection
- you need a tool usable without deep telecom expertise
- you want an open-source, EFF-backed detector with active development
- you want to minimize false positives when scanning for stingrays

## When to avoid
- you need passive detection on your existing phone without extra hardware
- you require guaranteed legal compliance outside the United States without consulting local law
- you need real-time enterprise-grade cellular network monitoring
- your device is not among the supported hardware list

## Facets
- artifact type: application
- maturity: active
- function: security, monitoring, networking
- domain: security, privacy, networking
- platform: embedded, cross-platform
- tags: imsi-catcher, stingray-detection, cellular-security, mobile-hotspot, surveillance, telecommunications, orbic-rc400l, surveillance-detection, linux

## Member repositories
- EFForg/rayhunter (main) score 93

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:27.907869+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:54:13.313940+00:00, confidence not recorded.
  - readme: https://github.com/EFForg/rayhunter (fetched 2026-08-28T04:09:27.907869+00:00, sha 79cb67a606ba)
  - homepage: https://efforg.github.io/rayhunter/ (fetched 2026-08-29T08:49:11.778354+00:00, sha c1771af357c8)
- Data as of 2026-08-30T08:39:29.467469+00:00.