AI companies
CompanyTo train its modelsTo answer people and search
- OpenAIChatGPTTo train its modelsKept out
GPTBotline 1To answer people and searchLet inOAI-SearchBotChatGPT-User - AnthropicClaudeTo train its modelsPartly
ClaudeBotline 2, kept outanthropic-ailine 14, kept outClaude-Weblet inTo 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 searchLet in
PerplexityBotPerplexity-User - MetaMeta AITo train its modelsKept out
meta-externalagentline 8FacebookBotline 7To answer people and searchLet inmeta-externalfetchermeta-webindexer - AppleApple IntelligenceTo train its modelsKept out
Applebot-Extendedline 6To answer people and searchNone named - AmazonTo train its modelsKept out
Amazonbotline 5To answer people and searchLet inAmzn-SearchBotAmzn-User - Common Crawlopen data for trainingTo train its modelsKept out
CCBotline 3To answer people and searchNone named - ByteDanceTo train its modelsPartly
Bytespiderline 23, kept outTikTokSpiderlet inTo answer people and searchNone named - MistralLe ChatTo train its modelsNone namedTo answer people and searchLet in
MistralAI-User
6 of the 27 other AI crawlers we know are kept out: cohere-ai, Diffbot, Omgilibot, Omgili, ImagesiftBot and 1 more.
What it tells AI crawlers
It gives no Content Signals and no “noai” tag.
Like 25% of the 1,283 popular sites whose robots.txt we’ve read since 29 Oct 2026, it keeps at least one AI training crawler out. Of the 1,585 popular sites we’ve checked since 29 Oct 2026, 11% have a page drawn by scripts, 3% send a Markdown copy, 10% have an llms.txt and 4% 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.