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9. Which AI engines can actually reach you

What this is

“AI” is not one thing. The same site can be readable by one engine and invisible to another, and the reason differs per vendor — blocking one company’s user-fetcher costs you nothing, blocking another’s may reduce your visibility, in that vendor’s own words.

What we found on vitadefence.com

All 5 engines checked can reach this site. Nothing to change. 6 items are openly not checked. Nothing about them is claimed.

All 5 engines we check can reach vitadefence.com. Its robots file answered HTTP 200.

EngineCan reach vitadefence.com
OpenAIyes
Anthropicyes
Perplexityyes
Appleyes
Googleyes

Openly not checked, because we have not read those vendors’ own pages: {‘what’: ‘Google-Extended’, ‘kind’: ‘crawler’, ‘why’: ‘we have not read the page behind this crawler, so it is named here rather than judged’}, {‘what’: ‘meta-externalagent’, ‘kind’: ‘crawler’, ‘why’: ‘we have not read the page behind this crawler, so it is named here rather than judged’}, {‘what’: ‘Bingbot’, ‘kind’: ‘crawler’, ‘why’: ‘we have not read the page behind this crawler, so it is named here rather than judged’}, {‘what’: ‘CCBot’, ‘kind’: ‘crawler’, ‘why’: ‘we have not read the page behind this crawler, so it is named here rather than judged’}, {‘what’: ‘Amazonbot’, ‘kind’: ‘crawler’, ‘why’: ‘we have not read the page behind this crawler, so it is named here rather than judged’}, {‘what’: ‘Bytespider’, ‘kind’: ‘crawler’, ‘why’: ‘we have not read the page behind this crawler, so it is named here rather than judged’}.

Measured on https://vitadefence.com.

The file at packs/09-per-engine/per-engine.txt says the same thing for vitadefence.com, so you can check this yourself rather than take our word for it.

Nothing to do here yet

There is no step to follow in this chapter for vitadefence.com today. Nothing has been invented to give you something to do.

When this starts to matter

Every engine we check can reach your site.