Diffbot . tier 2
Diffbot
Builds a commercial knowledge graph.
375 of the 3,633 sites we measured deny Diffbot access to their root, which is 10.3% of the index.
How to allow or block it
A group naming the token wins outright over the wildcard group. It does not inherit from it, so rules set under User-agent: * do not carry over.
# Allow Diffbot everywhere
User-agent: Diffbot
Disallow:
# Block Diffbot entirely
User-agent: Diffbot
Disallow: /Sites blocking Diffbot
Most-visited first. Showing up to 100 of 375.
| Rank | Domain | Score | Answer-surface crawlers | Stack |
|---|---|---|---|---|
| 5 | facebook.com | Score 38 out of 100, grade F, partial assessment | 6 blocked | unidentified |
| 11 | instagram.com | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 12 | mail.ru | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 16 | twitter.com | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 18 | linkedin.com | Score 18 out of 100, grade F, partial assessment | 9 blocked | unidentified |
| 25 | amazon.comrefused GPTBot | Score 8 out of 100, grade F | 10 blocked | Akamai |
| 40 | netflix.com | Score 65 out of 100, grade C, partial assessment | 3 blocked | unidentified |
| 52 | x.com | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 53 | pinterest.com | Score 20 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 60 | yahoo.comrefused GPTBot | Score 52 out of 100, grade D | 5 blocked | Next.js |
| 72 | chatgpt.com | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 74 | myfritz.net | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 80 | vimeo.com | Score 57 out of 100, grade D | 3 blocked | Next.js . Cloudflare |
| 86 | baidu.com | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 102 | reddit.com | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 119 | snapchat.com | Score 35 out of 100, grade F | 5 blocked | Next.js . Google Cloud / GFE |
| 120 | amazonvideo.com | Score 42 out of 100, grade D | 5 blocked | Amazon CloudFront |
| 154 | nytimes.comrefused GPTBot | Score 38 out of 100, grade F | 11 blocked | WordPress . Fastly |
| 161 | netflix.net | Score 65 out of 100, grade C, partial assessment | 3 blocked | unidentified |
| 176 | flickr.com | Score 47 out of 100, grade D, partial assessment | 6 blocked | unidentified |
| 188 | cnn.com | Score 32 out of 100, grade F | 10 blocked | Fastly |
| 200 | forbes.com | Score 63 out of 100, grade C, partial assessment | 5 blocked | Next.js . Fastly |
| 207 | bbc.com | Score 38 out of 100, grade F | 9 blocked | Next.js . Fastly |
| 227 | bbc.co.uk | Score 41 out of 100, grade D | 9 blocked | Fastly |
| 237 | canva.comrefused GPTBot | Score 72 out of 100, grade C, partial assessment | 4 blocked | Cloudflare |
| 245 | weather.com | Score 71 out of 100, grade C | 6 blocked | WordPress . Akamai |
| 252 | imdb.com | Score 8 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 258 | linktr.ee | Score 84 out of 100, grade B, partial assessment | 1 blocked | unidentified |
| 263 | meraki.com | Score 8 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 264 | launchpad.netrefused GPTBot | Score 19 out of 100, grade F | 9 blocked | unidentified |
| 277 | reuters.com | Score 29 out of 100, grade F, partial assessment | 9 blocked | unidentified |
| 278 | forter.com | Score 90 out of 100, grade A | 1 blocked | HubSpot CMS . Cloudflare |
| 286 | nature.com | Score 34 out of 100, grade F | 7 blocked | Fastly |
| 292 | weibo.com | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 317 | amazon.co.uk | Score 18 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 344 | naver.com | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 347 | trustpilot.com | Score 65 out of 100, grade C, partial assessment | 3 blocked | unidentified |
| 348 | wsj.com | Score 35 out of 100, grade F, partial assessment | 8 blocked | unidentified |
| 359 | bloomberg.comrefused GPTBot | Score 30 out of 100, grade F, partial assessment | 10 blocked | Fastly |
| 368 | vkontakte.ru | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 382 | amazon.de | Score 18 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 430 | nflxvideo.net | Score 65 out of 100, grade C, partial assessment | 3 blocked | unidentified |
| 431 | businessinsider.com | Score 70 out of 100, grade C | 1 blocked | Fastly |
| 453 | cnbc.comrefused GPTBot | Score 30 out of 100, grade F | 9 blocked | Akamai |
| 455 | sohu.com | Score 8 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 464 | gcdn.co | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 471 | edgecdn.ru | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 474 | aol.comrefused GPTBot | Score 40 out of 100, grade D | 5 blocked | Next.js |
| 476 | quora.com | Score 14 out of 100, grade F, partial assessment | 10 blocked | unidentified |
| 481 | gosuslugi.ru | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 497 | behance.net | Score 66 out of 100, grade C, partial assessment | 5 blocked | Fastly |
| 501 | amazon.co.jprefused GPTBot | Score 8 out of 100, grade F | 10 blocked | Akamai |
| 507 | ft.comrefused GPTBot | Score 58 out of 100, grade D, partial assessment | 6 blocked | Cloudflare |
| 525 | wired.com | Score 56 out of 100, grade D | 8 blocked | Cloudflare |
| 531 | usatoday.com | Score 27 out of 100, grade F | 11 blocked | unidentified |
| 557 | uol.com.br | Score 52 out of 100, grade D | 8 blocked | Akamai |
| 567 | telegraph.co.uk | Score 39 out of 100, grade F | 10 blocked | Adobe Experience Manager . Fastly |
| 568 | imgsmail.ru | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 601 | threads.com | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 602 | dailymail.co.ukrefused GPTBot | Score 30 out of 100, grade F | 11 blocked | Akamai |
| 612 | amazon.fr | Score 18 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 622 | nintendo.com | Score 51 out of 100, grade D | 5 blocked | Next.js . Fastly |
| 626 | techcrunch.com | Score 64 out of 100, grade C | 5 blocked | WordPress |
| 629 | sagepub.com | Score 69 out of 100, grade C | 1 blocked | unidentified |
| 630 | sharethrough.com | Score 17 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 641 | yelp.com | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 642 | amazon.ca | Score 18 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 657 | cnet.com | Score 45 out of 100, grade D | 10 blocked | WordPress |
| 666 | amazon.in | Score 18 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 673 | fb.com | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 679 | lemonde.fr | Score 53 out of 100, grade D | 5 blocked | Fastly |
| 681 | pinimg.com | Score 20 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 683 | hihonorcloud.com | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 684 | quantserve.com | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 693 | dailymail.comrefused GPTBot | Score 30 out of 100, grade F | 11 blocked | Akamai |
| 707 | amazon.co.za | Score 18 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 710 | creativecdn.com | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 712 | bandcamp.com | Score 48 out of 100, grade D | 4 blocked | Fastly |
| 714 | ted.com | Score 47 out of 100, grade D | 5 blocked | Next.js . Fastly |
| 728 | amazon.it | Score 18 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 734 | amazon.es | Score 18 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 749 | primevideo.com | Score 42 out of 100, grade D | 5 blocked | Amazon CloudFront |
| 766 | adform.net | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 767 | bild.de | Score 63 out of 100, grade C | 3 blocked | unidentified |
| 777 | blackhub.team | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 791 | amazon.com.au | Score 18 out of 100, grade F | 10 blocked | Amazon CloudFront |
| 798 | welt.de | Score 55 out of 100, grade D | 3 blocked | Varnish |
| 800 | disneyplus.com | Score 84 out of 100, grade B, partial assessment | 1 blocked | unidentified |
| 807 | theverge.com | Score 46 out of 100, grade D | 9 blocked | WordPress . Fastly |
| 810 | daum.net | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 815 | academia.edu | Score 53 out of 100, grade D, partial assessment | 6 blocked | unidentified |
| 816 | nbcnews.com | Score 34 out of 100, grade F | 11 blocked | Next.js . Akamai |
| 824 | lefigaro.fr | Score 58 out of 100, grade D | 7 blocked | unidentified |
| 834 | amazon.com.brrefused GPTBot | Score 8 out of 100, grade F | 10 blocked | Akamai |
| 869 | latimes.com | Score 61 out of 100, grade C | 2 blocked | Amazon CloudFront |
| 881 | hstgr.net | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 931 | healthline.com | Score 54 out of 100, grade D | 4 blocked | WordPress . Amazon CloudFront |
| 938 | mailchi.mp | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 946 | repubblica.it | Score 69 out of 100, grade C | 4 blocked | Amazon CloudFront |
| 968 | theatlantic.com | Score 50 out of 100, grade D | 8 blocked | Next.js . Cloudflare |
Using these figures
Free to reuse in research, journalism or a product under CC BY 4.0, with credit to Fidget Labs BV. Quote the measurement date so the claim stays checkable as the index moves.
CrawlIndex by Fidget Labs BV. "Sites blocking Diffbot." https://crawlindex.org (measured 2026-08-09). Licensed CC BY 4.0.