GEO vs AEO: The Difference, Explained for Business Owners

In GEO vs AEO, the two terms describe nearly the same work, with AEO (answer engine optimization) stressing the direct answer to one question and GEO (generative engine optimization) stressing a cited place in the answers that ChatGPT, Perplexity, Gemini, Claude, Google AI Overviews and AI Mode write.

The label matters less than the answers themselves. In a Pew Research Center study of the browsing of 900 U.S. adults in March 2025, Google users who saw an AI summary clicked a traditional search result in 8% of visits, compared with 15% when no summary appeared. When a written answer sits above the links, fewer people click past it, so being inside that answer is what counts. You don't want to pay twice to fix that because one job was sold to you under two names.

Key points

• GEO and AEO overlap heavily, and HubSpot says there's no industry standard for where one ends and the other begins.
• GEO comes from a research paper accepted to KDD 2024. AEO is a search marketing term, and some SEOs still use it only for Google features like featured snippets.
• Google, OpenAI and Perplexity document the same basic needs, which are access and readable pages, whatever label your vendor uses.

GEO vs AEO: what is the difference?

Keep the last row in mind when you compare proposals. If the work underneath matches, you're looking at one job with two names.

Where did the terms GEO and AEO come from?

GEO came from a research paper

The term comes from GEO: Generative Engine Optimization. Its abstract says "we introduce Generative Engine Optimization (GEO)" as a way to help content creators get their content seen in generative engine responses. The paper was first posted in November 2023 and accepted to KDD 2024. Our plain guide to generative engine optimization walks through what the researchers tested and found.

AEO grew up in search marketing

AEO is a search marketing term, and people use it two ways. HubSpot notes that some SEOs reserve AEO for traditional search features like featured snippets and People Also Ask. HubSpot itself uses AEO as the broader term, covering AI-generated answers too.

So if an agency pitches you AEO, ask which version it means. One version stops at Google's answer boxes. The other includes ChatGPT, Perplexity and the rest. Our plain owner's guide to answer engine optimization covers the broader meaning.

Why do vendors disagree on GEO vs AEO?

Nobody sets the vocabulary. HubSpot says, "There's no industry standard on this, because the discipline itself is still relatively new."

That's how two marketing firms can nest the terms in opposite directions. HubSpot treats AEO as the broader term. RankAI writes that "AEO is largely a subset of GEO." Yet they land in the same place on the work. HubSpot says that for most teams, AEO and GEO aren't two separate content programs, and RankAI says a team running AEO well typically also wins GEO.

For you, that means the acronym is packaging. What you're buying is the list of tasks inside it.

What do Google, ChatGPT and Perplexity actually ask for?

The engines' own documentation is a better guide than any vendor's definition, because it tells you what each engine needs before it can use your pages. Here's what each one says.

Every row is about letting the engine reach and read your pages. None of it changes with the acronym on a proposal.

Google's page on AI features and your website also says "The best practices for SEO remain relevant" for AI Overviews and AI Mode. OpenAI's crawler documentation treats search and model training as separate settings. GPTBot relates to training and OAI-SearchBot to search, so you can block training without dropping out of ChatGPT search.

Gemini and Claude aren't in this table. Check how each one reaches the web before you assume you're covered.

Do you need separate strategies for GEO vs AEO?

For a local or professional-services business, usually not. Settle these questions before you sign anything.

• "Do I need two vendors?" If two proposals list the same tasks, they're the same job. Pay for it once.
• "Isn't this just SEO?" It builds on SEO. Google says SEO best practices still apply to its AI features, and a page Google hasn't indexed can't be shown as a supporting link in AI Overviews or AI Mode.
• "Can anyone promise I'll be cited?" No. The GEO paper itself says content creators have "little to no control over when and how their content is displayed." Treat a guaranteed citation as a reason to keep looking.

How do you compare a GEO proposal with an AEO proposal?

The goal is one side-by-side list of tasks, so you can see whether two proposals are the same job under different names and which one covers more of what you need.

1. Cover the label. Ignore whether it says GEO, AEO or AI SEO, and write down the tasks.
2. Name the engines. Which of ChatGPT, Perplexity, Gemini, Claude, Google AI Overviews and AI Mode will they check?
3. Name the questions. Which buyer questions will they track, and how often will they ask them again?
4. Check access first. Will they confirm your pages are indexed in Google and Bing, and that robots.txt allows OAI-SearchBot and PerplexityBot?
5. Ask which pages change. Which pages get rewritten to answer a question in the opening lines, and who writes them?
6. Ask what you'll see. Will the report separate a mention of your name, a citation of your page and a recommendation of your business?

Hypothetical example: a dental practice gets two proposals, one titled AEO and one titled GEO. Laid side by side, both track 20 patient questions and both rewrite five service pages. The AEO proposal checks Google AI Overviews and ChatGPT. The GEO proposal adds Perplexity and Gemini. The engine list is the real difference, and it's what the practice should weigh against where its patients actually search.

Before you pick either label, find out where your business stands in the answers today. Vector Index's guide to answer engine optimization shows how a strategy built on named buyer questions and specific engines separates mentions from citations and recommendations, and how to recheck the same questions over time. Then every GEO vs AEO proposal you read has a starting point to compare against.

FAQ

Is GEO the same as AEO?

Close to it. HubSpot says there's no industry standard separating them. AEO leans toward being the direct answer to a question, and GEO leans toward being a cited source inside an answer an engine writes.

Is AEO part of GEO, or the other way around?

It depends on who's writing. RankAI calls AEO largely a subset of GEO, while HubSpot uses AEO as the broader term. Ask what work is included instead of which term is bigger.

Which should I focus on first, GEO or AEO?

Neither label. Start with access, because Google needs your pages indexed and ChatGPT search won't show sites that opt out of OAI-SearchBot. Then rewrite the pages that answer your buyers' most common questions.

Do I need an llms.txt file or special schema for GEO?

Not for Google. Google says you don't need new machine readable files, AI text files or markup to appear in AI Overviews or AI Mode, and there's no special schema.org structured data you need to add.

Is GEO replacing SEO?

No. Google says SEO best practices remain relevant for AI Overviews and AI Mode, and Microsoft says experiences like Copilot are powered by Bing's search index. Ranking work and answer work share the same foundation.