{
  "slug": "trail-of-bits",
  "category": "security-audit-firms",
  "name": "Trail of Bits",
  "description": "US security research and engineering firm that audits software, cryptography, blockchain and AI systems, and develops open-source security tools such as Slither and Echidna.",
  "website": "https://trailofbits.com",
  "license": null,
  "platforms": [],
  "jurisdiction": {
    "code": "US",
    "name": "United States",
    "eyes": "Five Eyes",
    "eu": false,
    "gdpr": false,
    "cloud_act": "provider"
  },
  "pick": false,
  "pick_reason": null,
  "disclosure": null,
  "grade": "B",
  "score": 86,
  "coverage": 100,
  "summary": "Trail of Bits scores 86 out of 100 (grade B) on the security audit firms criteria. It meets 3 of 4 criteria: publishes full reports, audits open-source projects and public research. It does not meet no trackers on website. It is based in the United States: Five Eyes member; subject to the US CLOUD Act. Automated tests: SSL Labs grade B and Mozilla HTTP Observatory grade D.",
  "url": "https://privacyratings.com/security-audit-firms/trail-of-bits/",
  "markdown": "https://privacyratings.com/security-audit-firms/trail-of-bits/index.md",
  "answers": {
    "public_reports": {
      "title": "Publishes full reports",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/trailofbits/publications",
      "note": "The public publications repository lists hundreds of full security review reports."
    },
    "open_source_work": {
      "title": "Audits open-source projects",
      "weight": 2,
      "answer": "yes",
      "evidence": "https://raw.githubusercontent.com/trailofbits/publications/master/reviews/2025-04-ostif-nats-securityreview.pdf",
      "note": "Public reviews include many open-source projects, such as PyPI Warehouse, the Linux kernel release signing process and OSTIF-funded audits like NATS."
    },
    "public_research": {
      "title": "Public research",
      "weight": 1,
      "answer": "yes",
      "evidence": "https://blog.trailofbits.com/",
      "note": "Publishes a regular research blog, conference papers and open-source security tools."
    },
    "no_trackers": {
      "title": "No trackers on website",
      "weight": 1,
      "answer": "no",
      "evidence": null,
      "note": "The home page loads HubSpot and Cloudflare Web Analytics."
    }
  },
  "tests": {
    "ssllabs": "B",
    "observatory": "D",
    "internetnl_web": null,
    "internetnl_mail": null,
    "trackers": [
      {
        "name": "Cloudflare Web Analytics",
        "host": "static.cloudflareinsights.com",
        "effect": "partial"
      },
      {
        "name": "HubSpot",
        "host": "js.hs-scripts.com",
        "effect": "no"
      }
    ],
    "tested_at": "2026-10-01T07:07:14.564Z"
  },
  "last_modified": "2026-10-01T07:44:20Z"
}