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Plain explanations of how AI search visibility is measured, what a score means, and what it does not tell you.

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llms.txt for AI search: what the evidence shows

What llms.txt actually is, what Google and the crawl data say about it, and how to check server logs to see whether it changed anything for your site.

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Why do AI answers change every time you ask?

AI engines generate an answer when you ask instead of looking one up, so a single visibility score is one draw from a distribution, not a fixed number.

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What is generative engine optimization?

What generative engine optimization (GEO) means, where the 2024 paper came from, and what a 2026 survey of 45 studies found about whether it works.

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Profound alternatives, priced, now that Profound is not

Profound withdrew its published pricing in September 2026. Eight alternatives priced with billing period, currency and the date each was read.

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Peec AI alternatives, and what six engines cost

Peec AI's $95 plan includes 3 of 6 engines. See the real cost at 6, plus 8 priced alternatives including Keylight, read 3 September 2026.

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LLMrefs alternatives, priced against the same $79

LLMrefs sells one plan at $79 a month, labelled limited time. Fifteen alternatives priced with billing period and currency, read September 2026.

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Best AI visibility tools, by buyer situation

A roundup written by a vendor has an obvious answer built in. This one sorts by buying situation and names the best fit for five, priced Sept 2026.