Weekly report · 2026-W38
The state of AI crawling
Measured on 30,222 reachable domains for the week ending 2026-09-20. Every figure is the result of an automated audit run the same way on every domain: read robots.txt, resolve the rules for 48 tracked agents, then send live requests as four of them.
30,222
domains measured
7%
block an answer engine
19%
refuse AI agents at the edge
14%
publish an llms.txt
Block rate by crawler with change on the previous week
| Crawler | Operator | Content used for | Block rate | Sites | Week on week |
|---|---|---|---|---|---|
| GPTBot | OpenAI | training | 8.2% | 2,479 of 30,286 | -3.1 pt |
| CCBot | Common Crawl Foundation | archive | 8.0% | 2,424 of 30,286 | -3.1 pt |
| Bytespider | ByteDance | training | 7.5% | 2,285 of 30,286 | -3.1 pt |
| ClaudeBot | Anthropic | training | 6.8% | 2,046 of 30,286 | -3.1 pt |
| Amazonbot | Amazon | training | 5.8% | 1,765 of 30,286 | -3.1 pt |
| Meta-ExternalAgent | Meta | training | 5.8% | 1,758 of 30,286 | -3.1 pt |
| Google-Extended | training | 5.7% | 1,726 of 30,286 | -3.2 pt | |
| Applebot-Extended | Apple | training | 5.6% | 1,700 of 30,286 | -3.1 pt |
| anthropic-ai | Anthropic | training | 4.2% | 1,267 of 30,286 | level |
| omgilibot | Webz.io | training | 4.1% | 1,241 of 30,286 | level |
| cohere-ai | Cohere | live retrieval | 3.9% | 1,179 of 30,286 | +0.1 pt |
| Diffbot | Diffbot | training | 3.8% | 1,156 of 30,286 | level |
| SemrushBot-OCOB | Semrush | training | 3.8% | 1,151 of 30,286 | +0.1 pt |
| omgili | Webz.io | training | 3.7% | 1,124 of 30,286 | level |
| PerplexityBot | Perplexity | answer index | 3.5% | 1,064 of 30,286 | -0.1 pt |
| ChatGPT-User | OpenAI | live retrieval | 3.5% | 1,047 of 30,286 | -0.1 pt |
| FacebookBot | Meta | training | 3.2% | 960 of 30,286 | -0.1 pt |
| YouBot | You.com | answer index | 2.9% | 877 of 30,286 | level |
| ImagesiftBot | ImageSift (Hive) | training | 2.7% | 830 of 30,286 | level |
| Timpibot | Timpi | training | 2.7% | 810 of 30,286 | -0.1 pt |
| Scrapy | Zyte (open-source framework) | training | 2.4% | 724 of 30,286 | level |
| AI2Bot | Allen Institute for AI | training | 2.2% | 663 of 30,286 | level |
| OAI-SearchBot | OpenAI | answer index | 2.1% | 648 of 30,286 | -0.1 pt |
| cohere-training-data-crawler | Cohere | training | 2.0% | 603 of 30,286 | level |
| Meta-ExternalFetcher | Meta | live retrieval | 1.8% | 542 of 30,286 | level |
| DuckAssistBot | DuckDuckGo | live retrieval | 1.7% | 511 of 30,286 | level |
| PanguBot | Huawei | training | 1.7% | 500 of 30,286 | level |
| Claude-SearchBot | Anthropic | answer index | 1.6% | 475 of 30,286 | level |
| Claude-User | Anthropic | live retrieval | 1.6% | 472 of 30,286 | level |
| Kangaroo Bot | Kangaroo LLM | training | 1.5% | 454 of 30,286 | level |
| Perplexity-User | Perplexity | live retrieval | 1.5% | 445 of 30,286 | level |
| MistralAI-User | Mistral AI | live retrieval | 1.4% | 428 of 30,286 | level |
| Google-CloudVertexBot | live retrieval | 1.2% | 372 of 30,286 | +0.1 pt | |
| Meta-WebIndexer | Meta | answer index | 1.2% | 358 of 30,286 | level |
| GoogleOther | training | 1.2% | 350 of 30,286 | +0.1 pt | |
| Applebot | Apple | answer index | 1.1% | 333 of 30,286 | level |
| TikTokSpider | ByteDance | live retrieval | 0.8% | 257 of 30,286 | level |
| Amzn-SearchBot | Amazon | answer index | 0.7% | 214 of 30,286 | level |
| Amzn-User | Amazon | live retrieval | 0.5% | 144 of 30,286 | level |
| MistralAI-Training | Mistral AI | training | 0.3% | 79 of 30,286 | +0.1 pt |
| MistralAI-Index | Mistral AI | answer index | 0.2% | 71 of 30,286 | level |
| facebookexternalhit | Meta | live retrieval | 0.2% | 54 of 30,286 | level |
| Bingbot | Microsoft | answer index | 0.1% | 39 of 30,286 | level |
| Googlebot-News | answer index | 0.1% | 37 of 30,286 | level | |
| msnbot | Microsoft | answer index | 0.1% | 26 of 30,286 | level |
| Meta-ExternalAds | Meta | training | 0.1% | 20 of 30,286 | level |
| Googlebot | answer index | 0.1% | 16 of 30,286 | level | |
| OAI-AdsBot | OpenAI | live retrieval | 0.0% | 6 of 30,286 | level |
Trend share of measured sites
Where the blocking is share blocking an answer engine, by top-level domain
Only TLDs with at least 40 measured domains are shown, and each bar carries its sample size. A TLD is a weak proxy for jurisdiction. Full segmentation.
Changes recorded this week 200 total
- miamioh.edu AI access score moved 93 to 46
- kmart.co.nz Published an llms.txt file
- mahkamahagung.go.id GPTBot is now allowed by robots.txt
- mahkamahagung.go.id ClaudeBot is now allowed by robots.txt
- mahkamahagung.go.id Google-Extended is now allowed by robots.txt
- mahkamahagung.go.id Applebot-Extended is now allowed by robots.txt
- mahkamahagung.go.id Meta-ExternalAgent is now allowed by robots.txt
- mahkamahagung.go.id Bytespider is now allowed by robots.txt
- mahkamahagung.go.id Amazonbot is now allowed by robots.txt
- mahkamahagung.go.id CCBot is now allowed by robots.txt
- zoro.com GPTBot is now refused at the network edge, whatever robots.txt permits
- zoro.com OAI-SearchBot is now refused at the network edge, whatever robots.txt permits
- zoro.com ClaudeBot is now refused at the network edge, whatever robots.txt permits
- zoro.com PerplexityBot is now refused at the network edge, whatever robots.txt permits
- zoro.com AI access score moved 52 to 68
- santafe.gov.ar AI access score moved 46 to 68
- osta.ee GPTBot is now allowed by robots.txt
- osta.ee GPTBot is no longer refused at the network edge
- osta.ee OAI-SearchBot is no longer refused at the network edge
- osta.ee ChatGPT-User is now allowed by robots.txt
- osta.ee ClaudeBot is no longer refused at the network edge
- osta.ee anthropic-ai is now allowed by robots.txt
- osta.ee Google-Extended is now allowed by robots.txt
- osta.ee GoogleOther is now allowed by robots.txt
- osta.ee Applebot-Extended is now allowed by robots.txt
- osta.ee PerplexityBot is now allowed by robots.txt
- osta.ee PerplexityBot is no longer refused at the network edge
- osta.ee FacebookBot is now allowed by robots.txt
- osta.ee Bytespider is now allowed by robots.txt
- osta.ee Amazonbot is now allowed by robots.txt
Cite this CC BY 4.0
The figures on this page are frozen to the week shown and will not be edited after publication. Corrections are appended, not overwritten.
Crawl Census, "The state of AI crawling, 2026-W38", 2026-09-20. https://crawlcensus.com/report/2026-W38Machine-readable: census totals, full corpus, crawler registry. Method: methodology.