{
  "entity_a": {
    "slug": "bingbot",
    "name": "Bingbot"
  },
  "entity_b": {
    "slug": "googlebot",
    "name": "Googlebot"
  },
  "fields_documented": 12,
  "claims": 21,
  "last_verified": "2026-09-15",
  "fields": [
    {
      "field": "cites_sources",
      "value_a": "yes",
      "value_b": "yes",
      "claim_id_a": 127,
      "claim_id_b": 69,
      "same": true
    },
    {
      "field": "follows_noarchive",
      "value_a": "yes",
      "value_b": null,
      "claim_id_a": 131,
      "claim_id_b": null,
      "same": false
    },
    {
      "field": "honours_crawl_delay",
      "value_a": "yes",
      "value_b": "no",
      "claim_id_a": 122,
      "claim_id_b": 64,
      "same": false
    },
    {
      "field": "observed_verified_request_ratio_census",
      "value_a": null,
      "value_b": "0.991",
      "claim_id_a": null,
      "claim_id_b": 149,
      "same": false
    },
    {
      "field": "opt_out_mechanism",
      "value_a": "yes",
      "value_b": null,
      "claim_id_a": 130,
      "claim_id_b": null,
      "same": false
    },
    {
      "field": "publishes_ip_list",
      "value_a": "yes",
      "value_b": "yes",
      "claim_id_a": 123,
      "claim_id_b": 65,
      "same": true
    },
    {
      "field": "purpose_documented",
      "value_a": "yes",
      "value_b": "search",
      "claim_id_a": 125,
      "claim_id_b": 67,
      "same": false
    },
    {
      "field": "reads_llms_txt",
      "value_a": "not_documented",
      "value_b": "no",
      "claim_id_a": 128,
      "claim_id_b": 132,
      "same": false
    },
    {
      "field": "respects_robots_txt",
      "value_a": "yes",
      "value_b": "yes",
      "claim_id_a": 121,
      "claim_id_b": 63,
      "same": true
    },
    {
      "field": "separate_search_and_training_tokens",
      "value_a": "no",
      "value_b": "yes",
      "claim_id_a": 126,
      "claim_id_b": 68,
      "same": false
    },
    {
      "field": "user_agent_string_full",
      "value_a": "Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)",
      "value_b": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html)",
      "claim_id_a": 129,
      "claim_id_b": 70,
      "same": false
    },
    {
      "field": "verifiable_by_rdns",
      "value_a": "yes",
      "value_b": "yes",
      "claim_id_a": 124,
      "claim_id_b": 66,
      "same": true
    }
  ],
  "differences": [
    {
      "field": "follows_noarchive",
      "statement_a": "Bingbot excludes noarchive-tagged content from Copilot and Chat answers and from generative AI training data.",
      "statement_b": null,
      "claim_id_a": 131,
      "claim_id_b": null
    },
    {
      "field": "honours_crawl_delay",
      "statement_a": "Microsoft states that a crawl-delay directive in robots.txt always takes precedence over Bing Webmaster Tools crawl control settings for Bingbot.",
      "statement_b": "Google does not support the robots.txt Crawl-delay directive for Googlebot.",
      "claim_id_a": 122,
      "claim_id_b": 64
    },
    {
      "field": "observed_verified_request_ratio_census",
      "statement_a": null,
      "statement_b": "Googlebot requests to Rattlesnakes By Mail matched Google's published IP ranges on 108 of 109 requests between 2026-09-13T20:00Z and 2026-09-15T09:00Z. Googlebot's first request to Rattlesnakes By Mail in that window was /robots.txt at 2026-09-14T11:53:00Z.",
      "claim_id_a": null,
      "claim_id_b": 149
    },
    {
      "field": "opt_out_mechanism",
      "statement_a": "Microsoft lets publishers block Bingbot content from Copilot answers and AI training using noarchive and nocache tags.",
      "statement_b": null,
      "claim_id_a": 130,
      "claim_id_b": null
    },
    {
      "field": "purpose_documented",
      "statement_a": "Bingbot serves as Microsoft's standard crawler and handles most of Bing's daily web crawling.",
      "statement_b": "Googlebot crawls pages for Google Search, Google Images, Google Video, Google News, and Discover.",
      "claim_id_a": 125,
      "claim_id_b": 67
    },
    {
      "field": "reads_llms_txt",
      "statement_a": "Microsoft does not publish whether Bingbot reads llms.txt files.",
      "statement_b": "Google Search does not use llms.txt files.",
      "claim_id_a": 128,
      "claim_id_b": 132
    },
    {
      "field": "separate_search_and_training_tokens",
      "statement_a": "Microsoft controls Bingbot's use in AI training through meta tags rather than publishing a separate training-specific crawler token.",
      "statement_b": "Google separates Search crawling under the Googlebot token from Gemini training under the Google-Extended token.",
      "claim_id_a": 126,
      "claim_id_b": 68
    },
    {
      "field": "user_agent_string_full",
      "statement_a": "Bingbot sends a user agent string containing bingbot/2.0 and a link to Microsoft's bingbot.htm page.",
      "statement_b": "Googlebot sends the user agent string Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html).",
      "claim_id_a": 129,
      "claim_id_b": 70
    }
  ],
  "sources": [
    "https://blogs.bing.com/search/April-2025/Introducing-Copilot-Search-in-Bing",
    "https://developers.google.com/crawling/docs/crawlers-fetchers/verifying-googlebot",
    "https://developers.google.com/search/blog/2019/07/a-note-on-unsupported-rules-in-robotstxt",
    "https://developers.google.com/search/docs/appearance/ai-features",
    "https://developers.google.com/search/docs/crawling-indexing/google-common-crawlers",
    "https://developers.google.com/search/docs/fundamentals/ai-optimization-guide",
    "https://developers.google.com/static/crawling/ipranges/common-crawlers.json",
    "https://rattlesnakesbymail.com/observed/googlebot",
    "https://www.bing.com/toolbox/bingbot.json",
    "https://www.bing.com/webmasters/help/ai-performance-9f8e7d6c",
    "https://www.bing.com/webmasters/help/crawl-control-55a30303",
    "https://www.bing.com/webmasters/help/how-to-verify-bingbot-3905dc26",
    "https://www.bing.com/webmasters/help/robots-meta-tags-and-attributes-that-bing-supports-5198d240",
    "https://www.bing.com/webmasters/help/which-crawlers-does-bing-use-8c184ec0"
  ]
}