{
  "slug": "bun",
  "category": "build-tools",
  "name": "Bun",
  "description": "JavaScript runtime, package manager, test runner and bundler in a single executable, built on JavaScriptCore and written in Zig.",
  "website": "https://bun.com",
  "source": "https://github.com/oven-sh/bun",
  "license": null,
  "platforms": [
    "windows",
    "macos",
    "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": "C",
  "score": 65,
  "coverage": 100,
  "summary": "Bun scores 65 out of 100 (grade C) on the bundlers and build tools criteria. It meets 2 of 4 criteria: open source and no ads or data sales. It partly meets no trackers or telemetry. It does not meet independent audit. It is based in the United States: Five Eyes member; subject to the US CLOUD Act.",
  "url": "https://privacyratings.com/build-tools/bun/",
  "markdown": "https://privacyratings.com/build-tools/bun/index.md",
  "answers": {
    "open_source": {
      "title": "Open source",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://github.com/oven-sh/bun/blob/main/LICENSE.md",
      "note": "MIT, with the statically linked JavaScriptCore under LGPL-2."
    },
    "no_trackers": {
      "title": "No trackers or telemetry",
      "weight": 3,
      "answer": "partial",
      "evidence": "https://bun.com/docs/runtime/bunfig",
      "note": "Anonymous crash reports are on by default and can be turned off, and the website uses Plausible analytics."
    },
    "no_ads": {
      "title": "No ads or data sales",
      "weight": 2,
      "answer": "yes",
      "evidence": "https://bun.com/blog/bun-joins-anthropic",
      "note": "Free MIT-licensed software backed by Anthropic, 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": "Plausible",
        "host": "plausible.io",
        "effect": "partial"
      }
    ],
    "tested_at": "2026-10-01T07:01:46.805Z"
  },
  "last_modified": "2026-10-01T07:44:20Z"
}