CIPHERCUE

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Which companies block DuckAssistBot in robots.txt?

DuckAssistBot is DuckDuckGo'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 DuckAssistBot. Sign up free, no credit card, to see the full list.

13,920 organisations observed disallowing DuckAssistBot in their robots.txt

A sample of the organisations observed

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

Amazon.com, Inc.
US
Consumer Services
www.amazon.com
Facebook
CN
Manufacturing
facebook.com
Trustpilot
GB
Technology
trustpilot.com
Urząd Miejski w Jaworznie
PL
Public Sector
www.jaworzno.pl
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See all 13,920 organisations blocking DuckAssistBot

Free, no credit card. Filter and view every organisation observed disallowing DuckAssistBot 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) ClaudeBot (16,305) 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) 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 DuckAssistBot 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.