GEO vs SEO: do you need both?

A homeowner in Garland with a dead AC at 9 p.m. used to type “AC repair near me” and scan the map. Now a growing share of people also ask ChatGPT or read the AI Overview at the top of Google: “Who’s a reliable HVAC company in Garland that does same-day repairs?” The first search returns a list you can rank in. The second returns a paragraph with two or three names in it. SEO is the work for the list. GEO is the work for the paragraph.

If you need the full definition of GEO first, read what generative engine optimization is. This page assumes you know the basics and want to know what actually changes in the work, and what you’d be paying for.

GEO vs SEO vs AEO, side by side

Three labels get thrown around in agency pitches. Here is how they compare on the things that matter to a contractor.

Notice how much of the GEO column says “all of SEO, plus”. That’s the honest picture, and it’s why we don’t sell GEO as a replacement for anything.

The real difference between SEO and GEO

Strip away the jargon and the difference between SEO and GEO comes down to three things.

A list vs a sentence

A search results page has ten links, a map with three businesses, maybe some ads. If you’re number five, you still get seen. An AI answer usually names a handful of businesses, sometimes one. There’s no page two. Either you’re in the sentence or you’re not.

A page vs a reputation

SEO is mostly judged page by page: does this service page deserve to rank for “tankless water heater install Plano”? GEO is judged on what the whole web says about your business. The AI tool reads your site, but also your Google Business Profile, review text, directories, local news and forum threads, then decides if you’re a safe name to repeat. A great page can’t outvote a messy or thin reputation.

A click vs a shortlist

SEO’s job ends at the click. With GEO, the homeowner may never visit your site. They read the answer, see your name next to “known for same-day service”, and search you directly or call. That makes GEO harder to measure and easier to underrate.

Where AEO fits

Answer engine optimization is the older of the two new terms. It grew up around featured snippets (the boxed answer at the top of some Google results) and voice assistants like Siri, Alexa and Google Assistant, which read one answer aloud. The goal was to be that one answer.

When people compare AEO vs SEO today, they mean much the same thing as GEO vs SEO. Some agencies use AEO for the on-page side (writing answer-first passages) and GEO for the off-site side (mentions, entity consistency). Others use the words interchangeably. For a contractor, the label doesn’t matter. Ask what work is actually being done each month, and how it’s measured.

How much of GEO is just SEO

More than the hype suggests. Google’s documentation on AI features and your website says there are no extra technical requirements to appear in AI Overviews or AI Mode: the page has to be indexed and eligible to show in normal Search, and regular SEO best practices apply. We cover what that means for the “SEO is dead” argument in is SEO dead now with AI?, so here’s just the practical overlap. If you have these, you already have most of your GEO foundation:

• Pages Google can crawl and index, one for each service you want to be hired for
• A verified, complete Google Business Profile with the right primary category
• Steady, recent reviews that mention the job and the city
• The same business name, phone and service area everywhere you’re listed
• Links and mentions from real local sources: suppliers, associations, local press

ChatGPT, Perplexity and Google’s AI features all lean on live search results when they answer local questions. If you don’t rank anywhere, there’s nothing for them to find.

What GEO adds on top

The extra layer is real, it’s just narrower than some pitches make it sound. For a home service business it usually means five jobs.

1. Answer-first writing. Each key page opens with a plain two-sentence answer: what you do, where, and for whom. AI tools lift clear passages; they skip throat-clearing intros.
2. Specific, quotable facts. Brands you install, warranty terms you actually offer, cities you cover, response windows you can keep. “We service Trane and Carrier systems across Plano, Allen and McKinney” gives a model something to repeat. “Quality service you can trust” doesn’t.
3. Third-party agreement. Getting the same facts onto sources you don’t control: directories, supplier dealer locators, trade associations, local news. When independent sources agree, AI tools name you with more confidence.
4. Crawler access. Checking that your site doesn’t block the bots AI search uses. OpenAI’s documentation says sites that block its OAI-SearchBot crawler won’t be shown in ChatGPT search answers. Many cheap security plugins and firewall rules block these bots without telling you. Since OpenAI has said ChatGPT search draws on third-party search providers, a verified Bing Webmaster Tools account is worth the ten minutes too.
5. Prompt testing. Asking ChatGPT, Gemini, Perplexity and Google the questions your customers ask, on a schedule, and recording who gets named. That’s the only way to know if any of the above is working.

How you measure each one

This is where the two differ most, and where agencies are easiest to fudge.

SEO has mature measurement. Google Search Console shows queries, impressions and clicks. A map grid shows where you rank across your service area. Call tracking shows which channel made the phone ring. Note that Google counts AI Overviews and AI Mode traffic inside the normal Search Console performance totals rather than splitting it out, so Search Console alone won’t tell you how you’re doing in AI answers.

GEO has no ranking report. AI answers change from one run to the next and differ by user and location, so a single screenshot proves little. The honest method is a fixed panel of prompts, run repeatedly across several engines, tracking how often you’re named and which sources get cited. Add to that the visits AI tools send you: ChatGPT often tags its outbound links with utm_source=chatgpt.com, so those sessions show up in your analytics. Our AI visibility audit sets up that baseline.

Do you need both? How to split the effort

For most home service businesses, GEO should be a slice of the search work, not a separate budget line. How big a slice depends on where you stand today:

• Your Google Business Profile or website is weak. Put almost everything into SEO and local SEO. GEO work on a shaky foundation is wasted.
• You rank well, but AI answers name competitors. That’s the gap GEO closes. Usually it’s thin third-party mentions, inconsistent facts, or pages that bury the answer.
• You sell high-ticket planned work like roofing, remodeling or foundation repair. Homeowners research these longer and are more likely to ask an AI tool for a shortlist, so GEO earns a bigger share.
• You mostly do emergency calls. The map pack still decides most of those. Keep SEO first and let GEO follow behind.

We run both under one plan for home service businesses across DFW, with one report built around calls. See our generative engine optimization service for the done-for-you side, or contact us and we’ll run your top customer questions through ChatGPT and Google AI on the call so you can see who gets named today.