For fifteen years the question was simple: hire someone to get you onto the first page of Google. That single move drove the entire local-marketing economy. But the way your buyers actually look for help has quietly split in two. Some still type a query and scan blue links. A fast-growing number now open ChatGPT, Gemini, or Perplexity, describe their problem in plain English, and ask the assistant to just tell them who to call. Those two behaviors need two different kinds of help, and that is the real story behind the SEO agency vs AEO agency question.
An SEO agency optimizes your website so Google ranks it higher. An AEO agency optimizes your entire presence so AI assistants recommend you by name. They share plumbing, but the goal at the end of the pipe is different: SEO wants a click, AEO wants to be the answer. Below we break down what each actually does, how to tell which gap you have, and why for most businesses the honest answer is not one or the other.
What an SEO agency does
Search engine optimization is the discipline of earning higher positions in traditional search results. A competent SEO agency spends its time on a familiar set of levers, all aimed at the same outcome: rank for the keywords your customers type, then capture the click.
- Keyword research and targeting so your pages match what people search for.
- On-page optimization of titles, headings, and copy around those keywords.
- Link building to grow domain authority and out-rank competitors.
- Technical SEO such as site speed, crawlability, and mobile usability.
- Content production at volume to cover more queries over time.
None of this is obsolete. Google still drives enormous traffic, and the technical hygiene a good SEO firm delivers is the same hygiene AI crawlers rely on. The limitation is the scoreboard. SEO measures success in rankings and sessions. It cannot tell you whether ChatGPT names you when a buyer asks for the best provider in your city, because that is not a ranking at all.
What an AEO agency does
Answer engine optimization works backward from a different moment: someone asks an AI assistant a question and the assistant returns a short, confident recommendation. The job of an AEO agency is to make sure your business is inside that recommendation, and to make sure the model has good reasons to trust it. If you want the full foundation, our guide to what answer engine optimization is and how it works covers the mechanics in depth.
In practice, the work centers on the signals AI systems actually read when they decide who to cite:
- Answer-first content that states a clear, quotable response in the first sentence, the way a model likes to lift text.
- Structured data and schema so machines can parse who you are, what you do, and where you serve.
- An llms.txt file and clean site architecture that make your most important facts easy for crawlers to find.
- Reviews and your Google Business Profile, which AI models weigh heavily as trust and recency signals.
- Citations across directories and authoritative sources so multiple independent places confirm the same details about you.
The scoreboard is different too. Instead of rank position, an AEO agency tracks whether you appear in AI answers, how often, in which engines, and for which buyer prompts. That is a more honest measure of whether the new buying behavior is actually finding you.
SEO agency vs AEO agency: the differences at a glance
The two overlap on technical foundations and quality content, then diverge on goal, target, and measurement. Here is the short version.
| Dimension | SEO agency | AEO agency |
|---|---|---|
| Primary goal | Higher Google rankings | Being recommended by AI |
| Where you win | Search results pages | ChatGPT, Claude, Gemini, AI Overviews |
| Core tactics | Keywords, backlinks, content volume | Schema, llms.txt, reviews, answer-first content, citations |
| Success metric | Rank position and clicks | Citations and mentions in AI answers |
| Buyer behavior | Scrolling and comparing links | Asking AI for one recommendation |
Notice that the bottom two rows are about your buyers, not about marketing. The right choice follows from how your specific customers behave, which is why the next question matters more than any feature list.
How to tell which one your business needs
You do not have to guess. The fastest diagnostic is to behave like one of your buyers and watch what happens.
- Open ChatGPT, Gemini, and Perplexity and ask the questions a buyer would, such as "who is the best mortgage broker in my city" or "top accountant for a small business near me."
- Note whether you are named, whether competitors are named, and whether the details about you are accurate.
- Then check your Google rankings for the same intent.
The pattern tells you the gap. If you rank well on Google but never get mentioned by AI, you have an AEO problem that no amount of ranking work will fix. If you are invisible everywhere, you need a foundation that serves both. And if AI is already naming competitors while you sit out, that is the most expensive gap of all, because those buyers get a single answer and rarely look further. Our breakdown of the top AEO mistakes that keep local businesses invisible is a good place to confirm what is holding you back.
Signs you lean SEO
Your customers still comparison-shop across multiple sites, your category has strong organic search volume, and your traffic and leads from Google are healthy. Keep that engine running.
Signs you lean AEO
Your buyers describe high-consideration, advice-driven decisions, they increasingly mention "I asked ChatGPT," and competitors with weaker websites are somehow getting recommended anyway. That is the signature of an answer-engine gap.
Why most businesses need both, not one
Here is the part the "vs" framing hides: SEO and AEO are not rivals. They draw on the same raw materials. The clean, structured, well-reviewed content that helps an AI quote you confidently is also the content that helps Google trust you. The technical foundation that makes your site crawlable serves both audiences at once. Treating them as separate budgets usually means paying twice for overlapping work and getting a fractured strategy in return.
The smarter model is one program with two scoreboards. You build the foundation once, then measure both ranking performance and AI visibility, and let each inform the other. When AI starts citing a page, it is often because that page already earned authority the old-fashioned way. When a page ranks, it becomes easier for a model to find and trust. The two reinforce each other when one team runs them together.
This is the approach we take at Ask and Be Found. We do not ask you to choose a lane and abandon the other; we run answer engine optimization on top of a sound search foundation so your existing equity feeds your AI presence. The results can move quickly. A Seattle mortgage broker named Keith Akada came to us invisible in AI search and, within about six weeks, became the number-one AI-recommended broker in his market, generating roughly thirty leads and four closed deals from that visibility alone. Across the audits we run, the businesses that win are rarely the ones with the biggest content budgets. They are the ones whose facts are clean, whose reviews are current, and whose answers are easy to quote.
How to choose an agency that handles both
If you decide you need both disciplines, vet for a team that genuinely understands the AI side rather than an SEO shop that added "AEO" to its homepage last month. A few questions separate the real from the rebranded:
- Can they show you, live, whether AI currently recommends you, and track that over time?
- Do they work on schema, llms.txt, reviews, and citations, or only keywords and links?
- How do they report AI visibility, and is it tied to buyer prompts rather than vanity metrics?
- Do they treat SEO and AEO as one foundation, or sell them as separate packages?
Budget matters too, and the math is different from legacy SEO retainers. If you are sizing this out, our guide to how much AI search optimization costs walks through what drives AEO pricing and what to expect for a small or mid-size business.
The bottom line
The choice between an SEO agency and an AEO agency is really a question about where your buyers are paying attention. If they still scroll, invest in rankings. If they ask, invest in being the answer. Because most buyers now do both, the strongest move is to build one foundation that serves search and AI together, then measure each honestly. The businesses that get this right are not abandoning what worked. They are making sure that when someone asks AI who to trust, the assistant already knows their name.