Answer Engine Optimisation (AEO): Guide & Free Checker

Updated 30 October 2026 · By the Insyrge.AEO team

Answer engine optimisation (AEO) is the practice of making your content easy for AI answer engines to find, understand, trust and cite, so that tools such as ChatGPT, Gemini, Perplexity and Google AI Overviews name your business when buyers ask questions. You may also see it spelled answer engine optimization, the US spelling. The meaning is identical.

This page is the hub for everything we publish on AEO. It explains how AI engines choose sources, gives you a free twelve-point AI Citation Checker, shows how Insyrge’s AEO service helps, and links to the detailed guides.

What is AEO, and why does it matter?

When someone asks an AI assistant a question, it often writes one answer and cites a few sources, rather than showing ten links. If your business is one of those sources, you are part of the answer. If not, the buyer may never see you. AEO is how you earn that place.

It builds on SEO rather than replacing it. Crawlable, helpful, trustworthy pages still matter. AEO adds three things: answers written to be quoted, evidence that engines can verify, and measurement of mentions and citations, not just rankings. For the plain-English definition, read What is answer engine optimization? or our blog definition.

How do AI engines choose what to cite?

Most citing happens when an engine searches the web for a question, reads the results and writes an answer from them. Three things decide whether your page is used.

Retrievable. The engine’s crawler can reach the page, and the page is indexed by the search engines the assistant relies on.
Quotable. The page states the answer clearly, near the top, in language that survives being lifted out of context.
Corroborated. Other trustworthy sources agree with what you say, so the engine is comfortable repeating it.

Free AI Citation Checker

Use this twelve-point checklist to see where your site stands. Tick each statement that is true today for your key pages. It runs in your browser and nothing is sent anywhere.

Access

Your robots.txt allows OAI-SearchBot, PerplexityBot, Claude-SearchBot, Bingbot and Googlebot on the pages you want cited.
Your key pages return a normal 200 status, carry no noindex directive and show their answer text in the HTML that loads first.
Your key pages are indexed in Google and Bing, and you have checked this in Search Console and Bing Webmaster Tools.

Answer

Each key page puts a direct one- or two-sentence answer straight under a question-style heading.
Each section still makes sense when lifted out of the page, with no references such as “as above”.
Each page shows a named author or reviewer and a visible updated date.

Evidence

Your claims are specific and link to primary sources, with no unsourced figures.
Your company name, description, offer and contact details read the same on your site and on every profile and listing.
Your structured data (Organization, Article and FAQ where there is real question-and-answer content) is valid and matches the visible page.

Reach and measurement

Independent sites such as directories, reviews and articles describe you consistently.
You have pages that answer decision questions, such as how to choose, honest comparisons and how pricing works.
You test a fixed panel of at least 20 buyer prompts each week across the AI engines and log mentions, citations and the sources cited instead.

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Tick the statements that are true for your key pages to see your score.

This checks your foundations. It does not query any AI engine. To see what ChatGPT, Gemini, Perplexity and others actually say about you, request our free AI visibility check.

How Insyrge’s AEO service helps you grow

Insyrge makes your business the source AI assistants quote, then connects that visibility to leads in your CRM. A person on our team does the work, and you see the results on a fixed schedule.

Baseline. We run your buyer prompts across the main AI engines and record who is mentioned and cited. See AI visibility and lead tracking.
Fix access. Crawlers, rendering and structured data, covered in technical AEO and schema.
Rewrite for answers. Answer-first pages engines can quote, through LLM-ready content.
Win Google’s AI features. See Google AI Overviews and AI-era SEO.
Earn corroboration. Independent mentions, delivered by digital PR and citations, plus generative engine optimisation for how models describe you.

Learn more about the method, see pricing, or start with the free AI visibility check.

Guides to go deeper

Get cited and measure it

Build the AI systems behind it

AEO reference

Frequently asked questions

What is answer engine optimisation (AEO)?

Answer engine optimisation (AEO) is the practice of making your content easy for AI answer engines to find, understand, trust and cite. It is spelled optimization in the US, and the meaning is the same. It sits alongside SEO rather than replacing it.

Is AEO the same as SEO?

No. SEO earns rankings in search results, while AEO earns mentions and citations inside AI-generated answers. They share foundations such as crawlability, quality content and trust, so good SEO helps, but AEO adds answer-first writing, corroboration and separate measurement.

Can you pay to be cited by ChatGPT?

No. Citations are not a paid placement. You earn them by being a clear, retrievable and corroborated source for the question being asked.

How long does AEO take to work?

It varies by topic, competition and how much needs fixing. Technical access fixes and page rewrites can show up in test prompts within weeks, but answers change over time, so track a fixed prompt panel weekly rather than expecting a switch to flip.

What does the free AI Citation Checker tell me?

It is a twelve-point self-check covering access, answers, evidence, reach and measurement. Your score shows which area to fix first. It does not query AI engines for you; for that, use our free AI visibility check.

Is AEO the same as GEO?

They overlap. AEO focuses on being cited in answers, while GEO (generative engine optimisation) focuses on how language models describe and recommend your brand. In practice the work is shared, and Insyrge delivers both.

Start with a free AEO check.

We run a sample of your buyer prompts across the major AI engines and send you what they say, who they cite and where you are missing.

Free AI visibility check Book a call

Answer engine optimisation (AEO): the complete guide