AI companies
CompanyTo train its modelsTo answer people and search
- OpenAIChatGPTTo train its modelsLet in
GPTBotTo answer people and searchLet inOAI-SearchBotChatGPT-User - AnthropicClaudeTo train its modelsKept out
ClaudeBotline 18anthropic-ailine 22Claude-Webline 20To answer people and searchLet inClaude-SearchBotClaude-User - GoogleGeminiTo train its modelsLet in
Google-ExtendedTo answer people and searchLet inGoogle-CloudVertexBot - PerplexityTo train its modelsNone namedTo answer people and searchPartly
PerplexityBotline 24, kept outPerplexity-Userlet in - MetaMeta AITo train its modelsPartly
meta-externalagentline 28, kept outFacebookBotlet inTo answer people and searchPartlymeta-externalfetcherline 30, kept outmeta-webindexerlet in - AppleApple IntelligenceTo train its modelsKept out
Applebot-Extendedline 34To answer people and searchNone named - AmazonTo train its modelsLet in
AmazonbotTo answer people and searchLet inAmzn-SearchBotAmzn-User - Common Crawlopen data for trainingTo train its modelsLet in
CCBotTo answer people and searchNone named - ByteDanceTo train its modelsPartly
Bytespiderline 32, kept outTikTokSpiderlet inTo answer people and searchNone named - MistralLe ChatTo train its modelsNone namedTo answer people and searchLet in
MistralAI-User
7 of the 27 other AI crawlers we know are kept out: cohere-ai, Diffbot, Omgilibot, Omgili, Timpibot and 2 more.
What it tells AI crawlers
It gives no Content Signals and no “noai” tag.
Like 29% of the 473 popular sites whose robots.txt we’ve read since 29 Oct 2026, it keeps at least one AI training crawler out. Of the 598 popular sites we’ve checked since 29 Oct 2026, 9% have a page drawn by scripts, 2% send a Markdown copy, 9% 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.