{
  "slug": "cowboy",
  "category": "elixir-frameworks",
  "name": "Cowboy",
  "description": "Small HTTP server for Erlang/OTP with support for HTTP/1.1, HTTP/2, WebSocket and REST handlers.",
  "website": "https://ninenines.eu/",
  "source": "https://github.com/ninenines/cowboy",
  "license": "ISC",
  "platforms": [
    "linux",
    "macos",
    "windows"
  ],
  "jurisdiction": null,
  "pick": false,
  "pick_reason": null,
  "disclosure": null,
  "grade": "B",
  "score": 80,
  "coverage": 100,
  "summary": "Cowboy scores 80 out of 100 (grade B) on the Elixir, Erlang and Gleam frameworks criteria. It meets 3 of 4 criteria: open source, no trackers or telemetry and no ads or data sales. It does not meet independent audit.",
  "url": "https://privacyratings.com/elixir-frameworks/cowboy/",
  "markdown": "https://privacyratings.com/elixir-frameworks/cowboy/index.md",
  "answers": {
    "open_source": {
      "title": "Open source",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/ninenines/cowboy/blob/master/LICENSE",
      "note": "ISC-licensed."
    },
    "no_trackers": {
      "title": "No trackers or telemetry",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/ninenines/cowboy",
      "note": "No telemetry or analytics in the source code, and the website loads no third-party scripts."
    },
    "no_ads": {
      "title": "No ads or data sales",
      "weight": 2,
      "answer": "yes",
      "evidence": "https://github.com/sponsors/essen",
      "note": "Funded by sponsors and paid consulting from the maintainer, 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": "Cloudflare Web Analytics",
        "host": "static.cloudflareinsights.com",
        "effect": "partial"
      },
      {
        "name": "Google Fonts",
        "host": "fonts.googleapis.com",
        "effect": "none"
      }
    ],
    "tested_at": "2026-10-01T07:02:19.045Z"
  },
  "last_modified": "2026-10-01T07:44:20Z"
}