CIPHERCUE

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Which companies block ClaudeBot in robots.txt?

ClaudeBot is Anthropic's AI crawler. CipherCue reads the public robots.txt of tracked organisations and records, per named AI crawler, whether the site declares a rule disallowing it. These are the organisations observed blocking ClaudeBot. Sign up free, no credit card, to see the full list.

16,305 organisations observed disallowing ClaudeBot in their robots.txt

A sample of the organisations observed

A few of the organisations whose robots.txt disallows ClaudeBot. Sign up free to filter and view the full list.

Amazon.com, Inc.
US
Consumer Services
www.amazon.com
glassdoor.fr
FR
Professional Services
glassdoor.fr
SoundCloud
DE
Technology
soundcloud.com
t-online.de
DE
Telecommunication
t-online.de
Urząd Miejski w Jaworznie
PL
Public Sector
www.jaworzno.pl
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See all 16,305 organisations blocking ClaudeBot

Free, no credit card. Filter and view every organisation observed disallowing ClaudeBot in robots.txt, alongside which other AI crawlers they block and their full observed infrastructure.

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Companies blocking other AI crawlers

GPTBot (17,401) Amazonbot (16,355) Meta-ExternalAgent (15,812) Google-Extended (15,535) anthropic-ai (15,395) Applebot-Extended (15,222) ChatGPT-User (14,998) cohere-ai (14,896) FacebookBot (14,796) Claude-Web (14,708) PerplexityBot (14,700) OAI-SearchBot (14,139) DuckAssistBot (13,920) Perplexity-User (13,790) Claude-SearchBot (13,766) MistralAI-User (13,742) CCBot (5,503) Bytespider (5,069)
How this is observed: CipherCue reads the public robots.txt each organisation publishes and records the disallow rules it declares per named user-agent. A site is recorded as blocking ClaudeBot when its robots.txt disallows the site root for that agent (or the * catch-all). robots.txt is a stated preference the crawler chooses whether to honour; this records what the site declares, not crawler behaviour. See the AI-crawler methodology.