{
  "slug": "security-onion",
  "category": "intrusion-detection",
  "name": "Security Onion",
  "description": "Linux distribution for threat hunting, network security monitoring and log management that bundles tools such as Suricata, Zeek and Elasticsearch with its own web console.",
  "website": "https://securityonionsolutions.com",
  "source": "https://github.com/Security-Onion-Solutions/securityonion",
  "license": null,
  "platforms": [
    "linux"
  ],
  "jurisdiction": {
    "code": "US",
    "name": "United States",
    "eyes": "Five Eyes",
    "eu": false,
    "gdpr": false,
    "cloud_act": "provider"
  },
  "pick": false,
  "pick_reason": null,
  "disclosure": null,
  "grade": "D",
  "score": 50,
  "coverage": 100,
  "summary": "Security Onion scores 50 out of 100 (grade D) on the intrusion detection criteria. It meets 2 of 4 criteria: open source and no ads or data sales. It does not meet no trackers or telemetry and independent audit. It is based in the United States: Five Eyes member; subject to the US CLOUD Act.",
  "url": "https://privacyratings.com/intrusion-detection/security-onion/",
  "markdown": "https://privacyratings.com/intrusion-detection/security-onion/index.md",
  "answers": {
    "open_source": {
      "title": "Open source",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/Security-Onion-Solutions/securityonion/blob/3/main/LICENSE",
      "note": "All code is public under the source-available Elastic License 2.0, which is not OSI-approved."
    },
    "no_trackers": {
      "title": "No trackers or telemetry",
      "weight": 3,
      "answer": "no",
      "evidence": "https://docs.securityonion.net/en/3/main/telemetry/",
      "note": "Console telemetry, chosen during setup, sends feature usage data to Google Analytics."
    },
    "no_ads": {
      "title": "No ads or data sales",
      "weight": 2,
      "answer": "yes",
      "evidence": "https://securityonionsolutions.com/pro/",
      "note": "Funded by Security Onion Pro licenses, hardware appliances, training and support, with no ads."
    },
    "independent_audit": {
      "title": "Independent audit",
      "weight": 2,
      "answer": "no",
      "evidence": null,
      "note": "No independent audit is published."
    },
    "transparency_report": {
      "title": "Transparency report",
      "weight": 2,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "user_notice": {
      "title": "Tells users about requests",
      "weight": 1,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "tls": {
      "title": "TLS configuration",
      "weight": 2,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "security_headers": {
      "title": "Security headers",
      "weight": 1,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "web_standards": {
      "title": "Modern web standards",
      "weight": 1,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    }
  },
  "tests": {
    "ssllabs": null,
    "observatory": null,
    "internetnl_web": null,
    "internetnl_mail": null,
    "trackers": [
      {
        "name": "Google Tag Manager",
        "host": "inline code",
        "effect": "no"
      }
    ],
    "tested_at": "2026-10-01T06:38:32.008Z"
  },
  "last_modified": "2026-10-01T06:56:31Z"
}