AI companies
CompanyTo train its modelsTo answer people and search
- OpenAIChatGPTTo train its modelsKept out
GPTBotline 41To answer people and searchLet inOAI-SearchBotChatGPT-User - AnthropicClaudeTo train its modelsPartly
ClaudeBotlet inanthropic-ailine 47, kept outClaude-Weblet inTo answer people and searchLet inClaude-SearchBotClaude-User - GoogleGeminiTo train its modelsKept out
Google-Extendedline 43To answer people and searchLet inGoogle-CloudVertexBot - PerplexityTo train its modelsNone namedTo answer people and searchPartly
PerplexityBotline 59, kept outPerplexity-Userlet in - MetaMeta AITo train its modelsPartly
meta-externalagentlet inFacebookBotline 51, kept outTo answer people and searchPartlymeta-externalfetcherline 139, kept outmeta-webindexerlet in - AppleApple IntelligenceTo train its modelsKept out
Applebot-Extendedline 227To answer people and searchNone named - AmazonTo train its modelsLet in
Amazonbotline 61To answer people and searchLet inAmzn-SearchBotAmzn-User - Common Crawlopen data for trainingTo train its modelsKept out
CCBotline 45To answer people and searchNone named - ByteDanceTo train its modelsPartly
Bytespiderline 81, kept outTikTokSpiderlet inTo answer people and searchNone named - MistralLe ChatTo train its modelsNone namedTo answer people and searchLet in
MistralAI-User
9 of the 27 other AI crawlers we know are kept out: cohere-ai, Diffbot, Omgilibot, ImagesiftBot, Timpibot and 4 more.
What it tells AI crawlers
It gives no Content Signals and no “noai” tag.
Like 26% of the 695 popular sites whose robots.txt we’ve read since 29 Oct 2026, it keeps at least one AI training crawler out. Of the 854 popular sites we’ve checked since 29 Oct 2026, 8% have a page drawn by scripts, 3% send a Markdown copy, 10% have an llms.txt and 3% offer a file for AI agents. How many websites block AI crawlers?
We read the site once, as our named bot: its robots.txt, read as crawlers read it, its home page and the files AI tools ask sites for. What we couldn’t read says so. robots.txt asks and doesn’t enforce: a firewall can treat AI crawlers differently from us.