ChatGPT-User: share of top websites blocking it

On 26 October 2026, 8.7% of the readable top 10k websites fully blocked ChatGPT-User in robots.txt (bounds 7.0% to 27.1% over all 8,220 websites, 1,659 of them unreadable); 3.9% blocked it partly and 10.4% named it.

Last verified 2026-10-26 21:13 UTC (daily run of 2026-10-26). Proof for that day.

Operator
OpenAI
What it is
AI Assistants
Description
ChatGPT-User is OpenAI's web crawler that visits websites when ChatGPT users request information. This enables ChatGPT to include links in its responses. More info can be found at https://knownagents.com/agents/chatgpt-user
robots.txt token
User-agent: ChatGPT-User
Listed since
2026-10-26 (in this ledger's registry)

Fully blocks

8.7%

572 sites; bounds 7.0% to 27.1%

Partly blocks

3.9%

255 sites

Name it explicitly

10.4%

684 sites; unreadable: 3,439

Over time

Share of panel sites blocking ChatGPT-User4 lines, 2016-09-05 to 2026-10-26; values between 2.52 and 8.72 %; latest 8.72 %.2.023.825.627.429.21Sep 2016Mar 2019Sep 2021Apr 2024Oct 2026blocks, reconstructed (Common Crawl): 2016-09-05 UTC: 3.14 %blocks, reconstructed (Common Crawl): 2017-09-25 UTC: 3.51 %blocks, reconstructed (Common Crawl): 2018-09-24 UTC: 3.61 %blocks, reconstructed (Common Crawl): 2019-09-23 UTC: 2.80 %blocks, reconstructed (Common Crawl): 2020-09-28 UTC: 2.52 %blocks, reconstructed (Common Crawl): 2021-09-27 UTC: 2.61 %blocks, reconstructed (Common Crawl): 2022-10-03 UTC: 2.55 %blocks, reconstructed (Common Crawl): 2024-09-16 UTC: 7.37 %blocks, reconstructed (Common Crawl): 2026-09-21 UTC: 7.25 %partly blocks, reconstructed (Common Crawl): 2016-09-05 UTC: 5.04 %partly blocks, reconstructed (Common Crawl): 2017-09-25 UTC: 4.91 %partly blocks, reconstructed (Common Crawl): 2018-09-24 UTC: 4.82 %partly blocks, reconstructed (Common Crawl): 2019-09-23 UTC: 4.76 %partly blocks, reconstructed (Common Crawl): 2020-09-28 UTC: 4.82 %partly blocks, reconstructed (Common Crawl): 2021-09-27 UTC: 4.98 %partly blocks, reconstructed (Common Crawl): 2022-10-03 UTC: 4.91 %partly blocks, reconstructed (Common Crawl): 2024-09-16 UTC: 4.76 %partly blocks, reconstructed (Common Crawl): 2026-09-21 UTC: 5.29 %blocks, daily observation: 2026-10-26 UTC: 8.72 %partly blocks, daily observation: 2026-10-26 UTC: 3.89 %

"Partly blocks" counts every robots.txt whose rules for ChatGPT-User 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: 8,220 websites, 1,659 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, sites readable in every crawl), a separate series.

Reconstructed values per crawl
CrawlDateBlocksSites read
CC-MAIN-2016-362016-09-053.1%3,216
CC-MAIN-2017-392017-09-253.5%3,216
CC-MAIN-2018-392018-09-243.6%3,216
CC-MAIN-2019-392019-09-232.8%3,216
CC-MAIN-2020-402020-09-282.5%3,216
CC-MAIN-2021-392021-09-272.6%3,216
CC-MAIN-2022-402022-10-032.5%3,216
CC-MAIN-2024-382024-09-167.4%3,216
CC-MAIN-2026-392026-09-217.2%3,216

Recent blockers

Sites that started fully blocking ChatGPT-User since 2026-07-28, highest-ranked first.

DateSiteWhat changed
ptt.ccnow blocks ChatGPT-User (was allow)
kasserver.comnow blocks ChatGPT-User (was allow)
lapresse.canow blocks ChatGPT-User (was allow)

Recent unblockers

DateSiteWhat changed
zimbra.comnow allows ChatGPT-User (was block)
resetera.comnow allows ChatGPT-User (was block)
olhardigital.com.brnow partly blocks ChatGPT-User (was block)

Sites blocking ChatGPT-User now

facebook.com (*) · fbcdn.net (*) · instagram.com (*) · twitter.com (*) · googlevideo.com (*) · amazon.com · x.com (*) · pinterest.com (*) · tiktok.com · yahoo.com · baidu.com (*) · amazonvideo.com · msn.com · reddit.com (*) · skybridge.click (*) · registrar-servers.com (*) · nytimes.com · cnn.com · meraki.com (*) · bbc.com · bbc.co.uk · t.co (*) · imdb.com (*) · nature.com · demdex.net (*) · weibo.com · amazon.co.uk · naver.com (*) · espn.com · bloomberg.com · amazon.de · cookiedatabase.org (*) · claude.ai · gcdn.co (*) · kwai.net (*) · quora.com · amazon.co.jp · edgecdn.ru (*) · threads.com (*) · netcraze.io (*) · usatoday.com · dailymail.com · telegraph.co.uk · amazon.fr · amazon.ca · techcrunch.com · sharethrough.com · primevideo.com · amazon.in · hstgr.net (*) · cambridge.org · imgsmail.ru (*) · fb.com (*) · hihonorcloud.com (*) · dailymail.co.uk · amazon.es · pinimg.com (*) · amazon.it · cnet.com · quantserve.com (*)

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

Cite this

InfraRabbit AI Crawl Ledger, "Share of top websites blocking ChatGPT-User", https://infrarabbit.com/crawlers/bot/ChatGPT-User, retrieved 2026-10-26. CC BY 4.0.