AI Crawler Index · Anthropic · ClaudeBot
Which reference websites block ClaudeBot?
As of 2026-10-03, 11 of the 45 reference websites whose robots.txt we could read (24.4%) block ClaudeBot, Anthropic's AI training crawler, on the home page, compared with 11% of all sites.
24.4%
of 45 reference websites block ClaudeBot
11%
of all sites
11
sites block it
All 11 reference websites that block ClaudeBot
| # | Site | Policy | Crawlers blocked |
|---|---|---|---|
| 115 | imdb.com | Blocks some AI search | 24 of 29 |
| 126 | nature.com | Blocks some AI search | 11 of 29 |
| 215 | quora.com | Blocks some AI search | 9 of 29 |
| 378 | academia.edu | Blocks some AI search | 21 of 29 |
| 417 | genius.com | Blocks some AI search | 10 of 29 |
| 432 | webmd.com | Blocks training only | 3 of 29 |
| 454 | healthline.com | Blocks some AI search | 9 of 29 |
| 471 | letterboxd.com | Blocks training only | 7 of 29 |
| 604 | themoviedb.org | Blocks some AI search | 20 of 29 |
| 608 | mydramalist.com | Blocks some AI search | 11 of 29 |
| 632 | jstor.org | Blocks training only | 4 of 29 |
Popular reference websites that allow ClaudeBot
Other AI crawlers and reference websites
- GPTBot 28.9%
- PerplexityBot 8.9%
- Google-Extended 17.8%
- CCBot 28.9%
- Bytespider 22.2%
- Applebot-Extended 20%
- OAI-SearchBot 6.7%
ClaudeBot in other segments
- news websites 32%
- .fr (France) websites 30.6%
- .au (Australia) websites 29.7%
- social websites 28.8%
- .it (Italy) websites 25.5%
- .nl (Netherlands) websites 25%
- .uk (United Kingdom) websites 21.1%
- .de (Germany) websites 20.2%
- .es (Spain) websites 19.4%
- .app websites 16.7%
- .ch (Switzerland) websites 16.7%
- .net websites 13.6%
- .com websites 12.2%
- e-commerce websites 10.5%
FAQ
- Which reference websites block ClaudeBot?
- imdb.com, nature.com, quora.com, academia.edu, genius.com, webmd.com, healthline.com, letterboxd.com, and 3 more (full list on this page).
- How many reference websites block ClaudeBot?
- As of 2026-10-03, 11 of the 45 reference websites whose robots.txt we could read (24.4%) block ClaudeBot, Anthropic's AI training crawler, on the home page, compared with 11% of all sites.
- How do I block or allow ClaudeBot on my site?
- Add "User-agent: ClaudeBot" followed by "Disallow: /" to https://<your-site>/robots.txt to block it, or "Allow: /" to allow it. Check the result with the free AI crawler checker at tools.yukai.uk/free/ai-crawler-checker.