AEO vs SEO vs GEO. What Each One Does, and What We Measured on Our Own Site

TL;DR: AEO vs SEO, GEO vs SEO, AEO vs GEO. All three comparisons come down to one question, which index are you trying to enter. SEO gets a page ranked in Google's results. AEO (answer engine optimization) gets a business cited inside an AI answer. GEO (generative engine optimization) is the part of AEO aimed at generative engines like ChatGPT and Gemini. We run all three on our own site and measure them separately, because they move separately.

The three terms get used as if they were one thing with three price tags. They are not. They are two indexes and one subset, and the page you are reading is a case in point. Google crawled it on May 9, 2026 and declined to index it. We rebuilt it in October 2026, and the rebuild is an experiment with a prediction logged before we shipped it. The numbers further down are from that lab.

What do SEO, AEO, and GEO stand for?

SEO is search engine optimization. The work of getting a page to rank in Google or Bing when someone types a query, by earning links, matching the query in the title and headings, and keeping the site technically clean.

AEO is answer engine optimization. The work of getting a business cited as the answer when an engine writes the answer instead of listing links. That includes Google's AI Overviews and AI Mode, ChatGPT, Perplexity, Claude, Gemini and Copilot. The unit of success is a citation, which is your page in the source list, or a mention of your name in the answer itself.

GEO is generative engine optimization. The subset of AEO that deals with the generative engines specifically, the ones that fetch pages live and write a synthesis. We treat AEO as the umbrella and GEO as the focused part of it, and we explain why in our guide to generative engine optimization.

What is the difference between SEO, AEO and GEO?

	SEO	AEO	GEO
The question it answers	Where does my page rank?	Does the engine cite me when it answers?	Does a generative engine fetch and quote me?
The index	Google's search index	The answer surfaces, Google AI Overviews included	The retrieval each model runs at answer time, plus what it learned in training
What you optimize	Title, headings, links, speed, crawlability	Question headings, a 40 to 60 word direct answer under each, schema, entity consistency across the web	Everything in AEO, plus named entities and dated first-party data the model can lift
Unit of success	A position and a click	A citation or a named mention	A citation inside the generated text
How you measure it	Search Console, rank trackers	Clarity AI Visibility, Search Console's Generative AI performance report (Search), repeated engine runs	Repeated runs per engine, N logged, source set recorded
Noise	A position or two	High. One run is a flicker. Three runs is a reading. Ten is a result	Same, and the models change under you

The overlap is real. A clean, fast, well-linked site helps all three. Where they diverge is the measurement. A rank is a rank. A citation is a probability, and you only learn it by asking the engine the same question many times and counting.

GEO vs SEO. Is GEO the same as SEO?

No. SEO moves Google's blue links. GEO moves what a generative engine writes. The two indexes can disagree about the same page, and on our site they do.

In July 2026 we published our first week of Microsoft Clarity AI Visibility data. Copilot and its partner systems cited evoix.io 79 times in seven days. The page that took most of those citations, our agencies shortlist, sat at an average position of 66 on Google, page seven, with zero clicks in the same window. Google was not sending it traffic. Copilot was quoting it anyway.

The reverse happens too. The page you are reading had 149 Google impressions in sixteen months at an average position of 64.7, zero clicks, and was last crawled on May 9, 2026 and left out of the index. That is a page Google looked at and passed on. Whether any AI engine cites it is a separate question with a separate answer, and the rebuild you are reading is how we find out.

So "GEO vs SEO" is a false choice if you read it as either or. Read it as two scoreboards. A small business can be invisible on one and recommended on the other, and most are not measuring the second one at all.

AEO vs GEO. Which term is the umbrella?

In our vocabulary AEO is the umbrella and GEO sits inside it. The reason is practical. The answer surfaces include Google's AI Overviews and voice assistants as well as the chat engines, and the work of being the answer covers all of them. GEO describes the engines that fetch pages at answer time and write something new, ChatGPT with search on, Perplexity, Gemini, Claude with web access, Copilot.

Some agencies flip it and call GEO the broad term. The naming matters less than the measurement. What matters is that each engine behaves like its own index. We asked ChatGPT and Perplexity 100 local "best provider" questions across 10 industries and 10 Central Florida cities for our Central Florida AI citation study. Perplexity cited Yelp in 91 of 100 answers. ChatGPT's top source was a directory most owners have never heard of. Two engines, two source habits, one question template. Optimizing "for AI" as if it were one place is how you end up cited nowhere.

Is SEO dead now with AI?

No, and our own data is the reason I say it with some confidence.

On September 30, 2026 we published a new article on answer engine optimization tools. Google had it indexed within two days (first seen indexed October 1). In the 28 days from September 21 to October 18 it earned 362 impressions at an average position of 54.8, with zero clicks. That is a new page on a young domain doing what new pages do on Google. Page six.

The same month, one post plus a thin social layer (a pinned X post, two X replies, a LinkedIn post, two Reddit comments) and one third-party list page got Stephane Morera into the contender lists for a made-up title, King of AEO, across ChatGPT, Perplexity, Gemini and Claude on 39 of 40 runs, and on the Florida and Central Florida versions of the question on 80 of 80. On the head question, "who is the King of AEO", the same setup scored 0 of 12. We published the whole experiment, baseline, prediction and verdict.

Those two results come from the same site in the same month, and one tells you nothing about the other. Google took the new page in slowly and put it on page six. The AI engines took the other page onto the contender lists within days and left it off the one question that matters most. Anyone telling you SEO is dead is reading one scoreboard. Anyone telling you AEO is a fad is reading the other.

What we measured on our own site, dated

Every number below has a date and an N, because an AI engine answer is not a fact until you have asked it enough times to count.

A title change was followed by ChatGPT going from 0 of 2 to 10 of 10. On September 12, 2026 we put "Central Florida" into the title and H1 of three pages, the home page among them. Before the change, ChatGPT named EVOIX on 0 of 2 runs of "Who is the best AEO digital marketing agency in Central Florida for small businesses?" On September 30, N=10, it named us on 10 of 10 and cited the home page on 10 of 10. The retired services page was cited once with its old title, and the /services/ai-seo hub not at all, so the home page carried it. We ranked first or "start here" on 8 of the 10. One day, one string, measured through DataForSEO's ChatGPT scraper with web search on. Strong, and not yet shown to be stable.

Claude did not follow. On October 21, 2026 we asked the same Central Florida question of ChatGPT, Perplexity and Claude, three runs each. ChatGPT named EVOIX and cited evoix.io on 3 of 3. Perplexity 3 of 3. Claude 0 of 3 on each of two model versions. The newer one opened every answer by declining to rank agencies; the older one ranked other agencies and put Web Market Florida first on two of three runs. Same question, same night, same site. One engine can be at zero while two are at full marks, which is why we never report "AI" as one number.

Google declined this page. Google admitted its neighbor within two days. Same folder, same site, same author. The page you are on was crawled May 9 and set aside. The tools article shipped September 30 and was indexed by October 1. The likely difference is the page, not the domain, and the rebuild you are reading is the test of that.

On the comparison question itself, our baseline is zero. On October 22, 2026 we asked all four engines "What is the difference between SEO, AEO and GEO?" and "AEO vs SEO: which one does a small business need in 2026?", three runs each. EVOIX was not named or cited in any of the 24 runs (Gemini's source URLs are unreadable redirects, so for Gemini we can only read the answer text), which is the honest baseline for this page. On the small-business version, ChatGPT drew 24 of its 30 citations from Google's own developer documentation, Perplexity's sources were a mix of small agency blogs plus Salesforce, TechnologyAdvice and some local business press, and Claude's included several agency sites. On the definition question, Claude answered from memory with no sources on all three runs. If you are a small business wondering whether you can enter these answers, the Perplexity and Claude source sets on the small-business question are the open door.

Which should a small business do first?

Start with the question your customers ask an engine, then work backwards. In practice the order is this.

1. Fix what both indexes need. Crawlable site, one clear service per page, a title that says what the page is, a Google Business Profile with the right category. A wrong primary Google Business Profile category was misfiling us for months; that story is here.
2. Put the exact question in a heading and answer it in the first 40 to 60 words. That block is what Google shows as a snippet and what the AI engines lift as written. We shipped question headings with short answer blocks on three of our own pages on October 22, 2026 and will publish the read.
3. Publish one dated, first-party number. A result from your own work, with a date. Engines cite specifics. They do not cite "we help businesses grow".
4. Measure the second scoreboard. Microsoft Clarity is free, and its AI Visibility report is part of it. Run our free AI visibility audit to see which engines already know you.
5. Then decide between SEO and AEO spend. If Google already sends you customers, the AEO layer is the addition. If neither index knows you, the foundation work is the same for both and you should not pay twice for it.

Frequently asked questions

Will AEO replace SEO?

No. AEO is built on the same crawlable, well-linked site that SEO needs. What changes is the scoreboard. A business can be cited from a page that sits on page seven of Google (our July 2026 Clarity data), and a page can rank on Google while the engines leave its name out of the answer (our King of AEO post sat sixth for the head question on September 25 and was named in 0 of 12 engine runs on September 30).

Is AEO part of SEO?

Depends who is invoicing you. Many agencies file AEO under SEO as a tactic. We treat it as a separate practice because the measurement is different. A rank is observed once. A citation is a rate, and you learn it by repeating the question and counting, with the N written down.

Can one page serve SEO and AEO at the same time?

Yes, and it should. A question as the heading, a direct answer under it, a table where a table fits, schema that says what the page is, and a dated number the engine can quote. That page ranks and gets cited. The page you are reading is built that way and is being measured both ways.

How do I know if an AI engine already cites my business?

Ask it, more than once. One run is a flicker. We use three runs as a reading and ten as a result, per engine, per question, and we log the source list every time. Microsoft Clarity's AI Visibility report shows Copilot citations at no cost, and our free AI visibility audit checks the others.

If you want the engine-by-engine detail, our generative engine optimization guide covers what moves each one. If you want it done, this is what the program looks like.