AI companies
CompanyTo train its modelsTo answer people and search
- OpenAIChatGPTTo train its modelsKept out
GPTBotline 235To answer people and searchLet inOAI-SearchBotline 106ChatGPT-Userline 103 - AnthropicClaudeTo train its modelsKept out
ClaudeBotline 127anthropic-ailine 37Claude-Webline 124To answer people and searchLet inClaude-SearchBotClaude-User - GoogleGeminiTo train its modelsKept out
Google-Extendedline 232To answer people and searchLet inGoogle-CloudVertexBot - PerplexityTo train its modelsNone namedTo answer people and searchPartly
PerplexityBotline 439, kept outPerplexity-Userlet in - MetaMeta AITo train its modelsPartly
meta-externalagentlet inFacebookBotline 208, kept outTo answer people and searchLet inmeta-externalfetchermeta-webindexer - AppleApple IntelligenceTo train its modelsLet in
Applebot-ExtendedTo answer people and searchNone named - AmazonTo train its modelsKept out
Amazonbotline 28To answer people and searchLet inAmzn-SearchBotAmzn-User - Common Crawlopen data for trainingTo train its modelsKept out
CCBotline 97To answer people and searchNone named - ByteDanceTo train its modelsPartly
Bytespiderline 94, kept outTikTokSpiderlet inTo answer people and searchNone named - MistralLe ChatTo train its modelsNone namedTo answer people and searchLet in
MistralAI-User
5 of the 27 other AI crawlers we know are kept out: cohere-ai, Diffbot, Omgilibot, Omgili and YouBot.
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.