Direct answer
Does AI discovery depend only on what's written on my own website?
No. AI systems and search engines can draw on evidence about a company from sources beyond its own site — structured public data like Wikidata, historical web archives, and independent crawls of the broader web. A company's own homepage copy is one input among several, not the whole picture.
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External, independent sources can corroborate or contradict what a company says about itself on its own site.
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Consistency across these sources matters more than any single source being perfect.
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This is why entity work sometimes needs to look outward, not just at on-site content and schema.
You can rewrite your homepage as many times as you want. It's still only one witness in a room full of them.
It's tempting to think of a website as the single source of truth about a company — after all, who knows the business better than the business itself? But search engines and AI systems don't have to take a company's word for it. They can, and often do, check what else the web says.
What else is out there
Structured public knowledge bases like Wikidata hold entries for many companies, independent of anything the company itself published — name, category, relationships to other entities, sometimes founding details. Broad, independent web crawls like Common Crawl capture what a huge swath of the internet actually says about a topic or a brand, not filtered through any one company's marketing team. Web-history archives preserve what a site used to say, which matters when a company has repositioned and old, contradicting information is still findable.
None of these sources are under a company's direct control. That's precisely what makes them useful as evidence — they're harder to simply assert your way into.
Why consistency across sources matters more than any one of them being perfect
A single outdated mention somewhere on the web usually isn't a problem. What creates genuine ambiguity is when a company's own site describes itself one way, an old cached version says something meaningfully different, and a third-party listing disagrees with both. From the outside, that looks less like a single source of truth with some noise around it, and more like an entity that's genuinely hard to pin down.
This is a different problem from a technical one like a missing schema tag. You can't fix external inconsistency by editing your own homepage — the fix has to happen at the source of the conflicting information, or at minimum, your own site needs to be unambiguous enough to serve as the clearest, most current record available.
Where this fits alongside on-site entity work
On-site work — clear, consistent Organization schema, plain language describing what the company actually does, a stable identity across every page — is still the foundation. It's covered in depth in Entity-Node Engineering for AI Crawlers. External entity evidence is the layer on top of that: it's what determines whether the rest of the web corroborates what your own site says, or quietly contradicts it.
It's also a good example of why an AI system's answer about your company reflects more inputs than any single test can fully capture — a point worth keeping in mind alongside the distinction between simulated and observed AI answers. An observed answer reflects whatever mix of sources the system drew on at that moment — which may or may not include the specific page you were hoping it would cite.
Look past your own homepage
Growthract checks entity evidence beyond your own site.
Structured public data, web-history evidence and independent web signals are used alongside on-site checks to understand whether a brand's identity is consistent across the web, not just on its own pages.
A couple of follow-up questions
Can I edit Wikidata or Common Crawl directly?
Not in the way you can edit your own site. Wikidata entries can sometimes be updated through their own editorial process; Common Crawl simply reflects what's already public on the web at crawl time.
Does this matter for a small, newer company?
Often the opposite problem shows up for newer companies — there's simply not much external evidence yet, rather than conflicting evidence. That's a different, usually more patient, problem to solve.
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