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ChatGPT, Perplexity, Claude, Microsoft Copilot and Google each publish their own rules for reaching their answers, with different crawlers and different ways to count the result. We track all five on one retainer. Each has a page with its rules sourced line by line.
| Engine | Search crawler | Training | What it needs from you | How you count it |
|---|---|---|---|---|
| ChatGPTRead the sheet | Search crawlerOAI-SearchBot, plus your host or CDN allowing OpenAI's IPs | TrainingGPTBot, a separate setting | What it needs from youAllow the search crawler at every layer | How you count itYour analytics; OpenAI documents no method |
| PerplexityRead the sheet | Search crawlerPerplexityBot | TrainingPerplexity says this crawler isn't used for foundation models | What it needs from youAllow the search crawler | How you count itYour analytics; citations show what each answer used |
| ClaudeRead the sheet | Search crawlerClaude-SearchBot, plus Claude-User for user requests | TrainingClaudeBot, listed separately | What it needs from youAllow the search and user bots | How you count itYour analytics; Anthropic documents no method |
| Microsoft CopilotRead the sheet | Search crawlerBingbot, on the same foundation as Bing search | TrainingAI Training preference, from February 2027 | What it needs from youBe in Bing's index, without NoArchive or NoCache | How you count itAI Performance report in Bing Webmaster Tools |
| GoogleRead the sheet | Search crawlerGooglebot, for AI Overviews and AI Mode | TrainingGoogle-Extended, separate from Search | What it needs from youIndexed and eligible for a snippet, with no special files | How you count itSearch Console, inside the Web search type |
Summarised from each maker's pages, read . Each engine's page links to the sources.
The free audit runs 15 of your buyers' questions on 5 AI engines and shows who gets named. It arrives 48 business hours after we confirm.