ClaudeBot: share of top websites blocking it

On 27 October 2026, 14.2% of the readable top 10k websites fully blocked ClaudeBot in robots.txt (bounds 11.4% to 31.5% over all 8,219 websites, 1,657 of them unreadable); 3.6% blocked it partly and 14.7% named it.

Last verified 2026-10-28 03:59 UTC (daily run of 2026-10-27). Proof for that day.

Operator
Anthropic
What it is
Scrapes data to train Anthropic's AI products.
Description
Scrapes data to train LLMs and AI products offered by Anthropic.
robots.txt token
User-agent: ClaudeBot
Listed since
2026-10-26 (in this ledger's registry)

Fully blocks

14.2%

933 sites; bounds 11.4% to 31.5%

Partly blocks

3.6%

239 sites

Name it explicitly

14.7%

967 sites; unreadable: 3,438

Over time

Share of panel sites blocking ClaudeBot4 lines, 2016-09-05 to 2026-10-27; values between 2.58 and 14.22 %; latest 14.22 %.1.655.028.4011.7715.15Sep 2016Mar 2019Oct 2021Apr 2024Oct 2026blocks, reconstructed (Common Crawl): 2016-09-05 UTC: 3.79 %blocks, reconstructed (Common Crawl): 2016-10-03 UTC: 2.58 %blocks, reconstructed (Common Crawl): 2017-01-23 UTC: 3.96 %blocks, reconstructed (Common Crawl): 2017-04-24 UTC: 3.19 %blocks, reconstructed (Common Crawl): 2017-07-24 UTC: 4.13 %blocks, reconstructed (Common Crawl): 2017-09-25 UTC: 3.66 %blocks, reconstructed (Common Crawl): 2017-10-23 UTC: 3.32 %blocks, reconstructed (Common Crawl): 2018-01-29 UTC: 3.32 %blocks, reconstructed (Common Crawl): 2018-09-24 UTC: 3.97 %blocks, reconstructed (Common Crawl): 2019-09-23 UTC: 2.82 %blocks, reconstructed (Common Crawl): 2020-09-28 UTC: 2.68 %blocks, reconstructed (Common Crawl): 2021-09-27 UTC: 2.91 %blocks, reconstructed (Common Crawl): 2022-10-03 UTC: 2.64 %blocks, reconstructed (Common Crawl): 2023-10-02 UTC: 3.00 %blocks, reconstructed (Common Crawl): 2024-09-16 UTC: 6.58 %blocks, reconstructed (Common Crawl): 2025-09-15 UTC: 9.84 %blocks, reconstructed (Common Crawl): 2026-09-21 UTC: 12.30 %partly blocks, reconstructed (Common Crawl): 2016-09-05 UTC: 4.78 %partly blocks, reconstructed (Common Crawl): 2016-10-03 UTC: 4.97 %partly blocks, reconstructed (Common Crawl): 2017-01-23 UTC: 4.78 %partly blocks, reconstructed (Common Crawl): 2017-04-24 UTC: 4.83 %partly blocks, reconstructed (Common Crawl): 2017-07-24 UTC: 4.67 %partly blocks, reconstructed (Common Crawl): 2017-09-25 UTC: 4.63 %partly blocks, reconstructed (Common Crawl): 2017-10-23 UTC: 4.60 %partly blocks, reconstructed (Common Crawl): 2018-01-29 UTC: 4.72 %partly blocks, reconstructed (Common Crawl): 2018-09-24 UTC: 4.30 %partly blocks, reconstructed (Common Crawl): 2019-09-23 UTC: 4.38 %partly blocks, reconstructed (Common Crawl): 2020-09-28 UTC: 4.28 %partly blocks, reconstructed (Common Crawl): 2021-09-27 UTC: 4.24 %partly blocks, reconstructed (Common Crawl): 2022-10-03 UTC: 4.32 %partly blocks, reconstructed (Common Crawl): 2023-10-02 UTC: 4.42 %partly blocks, reconstructed (Common Crawl): 2024-09-16 UTC: 4.30 %partly blocks, reconstructed (Common Crawl): 2025-09-15 UTC: 4.43 %partly blocks, reconstructed (Common Crawl): 2026-09-21 UTC: 4.21 %blocks, daily observation: 2026-10-26 UTC: 13.78 %blocks, daily observation: 2026-10-27 UTC: 14.22 %partly blocks, daily observation: 2026-10-26 UTC: 3.66 %partly blocks, daily observation: 2026-10-27 UTC: 3.64 %

"Partly blocks" counts every robots.txt whose rules for ClaudeBot disallow some paths, including generic rules for all crawlers (for example /search); it is not a measure of targeted AI policy. Shares are of the readable websites (W − U: 8,219 websites, 1,657 unreadable); the bounds assume none / all of the unreadable sites block. Solid: daily first-party observations (top 10k of the Tranco list W3ZV9, one fixed cohort). Dashed: reconstructed from Common Crawl (top 10k), a separate series.

Reconstructed values per crawl
CrawlDateBlocksSites read
CC-MAIN-2016-362016-09-053.8%5,355
CC-MAIN-2016-402016-10-032.6%5,235
CC-MAIN-2017-042017-01-234.0%5,458
CC-MAIN-2017-172017-04-243.2%5,449
CC-MAIN-2017-302017-07-244.1%5,397
CC-MAIN-2017-392017-09-253.7%5,355
CC-MAIN-2017-432017-10-233.3%5,329
CC-MAIN-2018-052018-01-293.3%5,300
CC-MAIN-2018-392018-09-244.0%5,768
CC-MAIN-2019-392019-09-232.8%5,773
CC-MAIN-2020-402020-09-282.7%5,860
CC-MAIN-2021-392021-09-272.9%5,914
CC-MAIN-2022-402022-10-032.6%5,692
CC-MAIN-2023-402023-10-023.0%5,930
CC-MAIN-2024-382024-09-166.6%6,065
CC-MAIN-2025-382025-09-159.8%6,045
CC-MAIN-2026-392026-09-2112.3%5,868

Recent blockers

Sites that started fully blocking ClaudeBot since 2026-07-29, highest-ranked first.

DateSiteWhat changed
n-tv.denow blocks ClaudeBot (was allow)
vnexpress.netnow blocks ClaudeBot (was allow)
ay267.comnow blocks ClaudeBot (was allow)
fanfiction.netnow blocks ClaudeBot (was allow)
hai8g.comnow blocks ClaudeBot (was allow)
aternos.orgnow blocks ClaudeBot (was allow)
ptt.ccnow blocks ClaudeBot (was allow)
omg10.comnow blocks ClaudeBot (was allow)
bblaa.comnow blocks ClaudeBot (was allow)
xnxx.healthnow blocks ClaudeBot (was allow)
crn77.comnow blocks ClaudeBot (was allow)
nya2.comnow blocks ClaudeBot (was allow)
ey43.comnow blocks ClaudeBot (was allow)
manhwaweb.comnow blocks ClaudeBot (was allow)
xn--12c1ezaww.comnow blocks ClaudeBot (was allow)
loteriadehoy.comnow blocks ClaudeBot (was allow)
elmundo.esnow blocks ClaudeBot (was allow)
kasserver.comnow blocks ClaudeBot (was allow)
filmyzilla56.comnow blocks ClaudeBot (was allow)
filmyzilla62.comnow blocks ClaudeBot (was allow)
filmyzilla63.comnow blocks ClaudeBot (was allow)
mastodon.socialnow blocks ClaudeBot (was allow)
bollyflix.afnow blocks ClaudeBot (was allow)
vaticannews.vanow blocks ClaudeBot (was allow)
swwoittlv.ccnow blocks ClaudeBot (was allow)

Recent unblockers

DateSiteWhat changed
vnexpress.netnow allows ClaudeBot (was block)
zimbra.comnow allows ClaudeBot (was block)
nova-app.eunow allows ClaudeBot (was block)
olhardigital.com.brnow partly blocks ClaudeBot (was block)

Sites blocking ClaudeBot now

facebook.com · fbcdn.net · instagram.com · twitter.com (*) · googlevideo.com (*) · amazon.com · whatsapp.net · x.com (*) · pinterest.com (*) · tiktok.com · whatsapp.com · yahoo.com · baidu.com (*) · msn.com · reddit.com (*) · skybridge.click (*) · registrar-servers.com (*) · t-online.de · snapchat.com · tumblr.com · nytimes.com · flickr.com (*) · ebay.com · theguardian.com · cnn.com · bbc.com · forbes.com · bbc.co.uk · t.co (*) · imdb.com (*) · canva.com · launchpad.net · reuters.com (*) · nature.com · demdex.net (*) · weibo.com (*) · amazon.co.uk · naver.com (*) · washingtonpost.com · bloomberg.com · wsj.com (*) · amazon.de · cookiedatabase.org (*) · unsplash.com · aol.com · gcdn.co (*) · pixabay.com · businessinsider.com · kwai.net (*) · quora.com · amazon.co.jp · statista.com · aliexpress.com · behance.net · edgecdn.ru (*) · uol.com.br · ft.com · wired.com · tripadvisor.com · threads.com

(*) blocked through the * group, not by name. Full list in current.csv.

Cite this

InfraRabbit AI Crawl Ledger, "Share of top websites blocking ClaudeBot", https://infrarabbit.com/crawlers/bot/ClaudeBot, retrieved 2026-10-27. CC BY 4.0.