Do you need separate SEO and AEO agencies in 2027?

Usually not. For most multi-location businesses, SEO and answer engine optimization (AEO) should sit under one accountable provider and one plan, because both programs change the same pages, templates, Business Profiles and crawl settings. Two specialist vendors make sense in a few specific cases. If you run two, one of them, or you, has to own the plan.

That is a position a good SEO agency and a good AEO specialist could both disagree with, so this post lays out the reasoning, a worked example, and the best case for keeping them separate. We sell both services, so weigh the argument on what you can verify yourself.

Where do SEO and AEO overlap?

On almost everything that lives on your own site and your own listings. The engines say so in their documentation.

Google's guide to optimizing for generative AI features defines AEO and GEO and then states that, from Google Search's perspective, optimizing for generative AI search is optimizing for the search experience, and thus still SEO. The same guide says you do not need new machine-readable files, AI text files or special schema markup, and that there is no requirement to break content into small pieces for AI. Its AI features documentation adds the eligibility rule: to appear as a supporting link in AI Overviews or AI Mode, a page must be indexed and eligible to be shown with a snippet.

The other engines describe the same foundation in their own terms. OpenAI's crawler documentation says sites opted out of OAI-SearchBot will not be shown in ChatGPT search answers. Perplexity's crawler page says PerplexityBot exists to surface and link websites in its search results and recommends allowing it. Microsoft's AI Performance announcement for Bing Webmaster Tools, dated February 2026, recommends clear headings, tables and FAQ sections, claims supported with sources, regular updates, and current local business details.

Read that list as a program owner. Crawl access, indexation, page structure, content freshness, Business Profile accuracy. Every item is already in a competent SEO scope. Whoever does AEO for you will need to change the same assets.

The table is our reading of typical scopes, not a published standard. Put your own two statements of work side by side and you can check it in an hour.

Where do they differ?

In three places: which engines are covered, how much of the work is off your site, and how results are measured. These are the reasons AEO is a real line of work and not a renamed SEO report.

Coverage. Google's guide is explicit that it gives best practices for Google Search. It does not speak for ChatGPT, Perplexity or Copilot, which run their own crawlers and, in Microsoft's case, their own citation reporting. An SEO program built only around Google's index and Search Console is not checking those.

Ranking well is no longer the same as being cited. In March 2026 Ahrefs analyzed 863K keyword results and about 4 million AI Overview citation URLs. It found 37.9% of cited URLs also appeared in the top 10 for the same query, and 31.0% did not rank in the top 100 at all. Its July 2025 study had put the top 10 share near 76%. Ahrefs cautions that the two are not a clean comparison, because its parsing improved and AI Overviews moved to a newer Gemini model in between. The direction still matters to a budget owner: a report that shows page-one rankings does not tell you whether you are in the answer.

Off-site presence. A May 2025 Ahrefs study of 75,000 brands found branded web mentions had the strongest correlation with appearing in AI Overviews (0.664), well ahead of the number of backlinks (0.218). That is correlation, not cause, and the study only covered sites with stronger link profiles. Google's guide also warns that seeking inauthentic mentions is not as helpful as it might seem. What it does support is that being described on other sites is a workstream of its own, closer to PR than to on-page SEO.

Measurement. SEO reports rank and clicks. AI answers vary from run to run, so AEO reports how often you are named across many runs of a fixed prompt set. We covered the sampling math in how to measure AI share of voice across 50+ locations. Google's guide points site owners to the Generative AI performance report in Search Console for its own features and cautions that no third-party tool has access to its internal ranking or AI systems. For a wider comparison of the two disciplines, see AEO vs SEO.

What goes wrong with two unconnected vendors?

The overlap turns into collisions, and the coordination becomes your team's job. A worked example shows the pattern better than a principle.

For example, suppose a 40-location home services brand keeps its SEO agency and adds an AEO specialist in January. This is an illustrative scenario, not a client account. In the first quarter:

• Both vendors run a technical audit and deliver overlapping findings in different formats. The web team gets two ticket lists for one template.
• The AEO vendor asks for question-led sections and a summary block on every location page. The SEO agency is midway through a rewrite of the same pages aimed at different keywords. One set of work gets overwritten.
• The SEO agency's last site hardening tightened bot rules at the CDN. The AEO vendor finds AI crawlers blocked. Each change is reasonable alone, and nobody owned the decision.
• Each vendor edits schema on the location template. The second deployment removes fields the first one added.
• In the quarterly review, one deck shows organic clicks down and the other shows AI mentions up. The two use different location groupings, so nobody can say whether the program is working.

None of that requires a bad vendor. It only requires two scopes that each include the same assets and no single owner of the queue. In this example the brand ends up paying for two audits, two content plans and two reporting stacks, and its own marketing lead spends the quarter refereeing.

The cost side follows the same logic. WebFX, which sells both services, lists enterprise SEO at $10,000 to $50,000 or more a month on its SEO pricing page and enterprise GEO at $25,000 to $50,000 or more on its GEO cost page. Those are one agency's published ranges, not an audited market rate. When two retainers at that level each include an audit, on-page work and reporting, part of what you buy is the same work twice. Our AEO vs SEO cost comparison sets out more of the published figures.

But two specialists will each go deeper than one generalist

This is the strongest objection, and in several situations it is correct.

The best case for two vendors runs like this. Enterprise technical SEO is hard: migrations, international setups, large template systems and log analysis take years to learn. AI measurement and off-site work are a different craft, with different tools and different relationships. An agency that added "AEO" to its services page last year may be selling the same deliverables under a new label. A specialist who does nothing else will see patterns a generalist misses. And putting both programs with one provider concentrates your risk in one relationship.

All of that is fair. It leads to clear cases where two providers is the right structure:

• Your SEO agency is hitting its numbers. Do not fire a provider that is performing to tidy up an org chart. Add the missing scope around them.
• Your SEO provider cannot show AI answer sampling, cited-source analysis or AI crawler checks when asked. A specialist fills a real gap.
• You have an in-house SEO team. An outside AEO specialist reporting into that team is one plan, not two.
• You are locked into a contract term. A scoped AEO engagement is a sensible bridge until renewal.
• The program is large enough to staff a lead on your side who owns the plan and the change queue.

The honest answer to the objection is that depth and structure are separate questions. Depth is about who does the work. Structure is about who decides what changes on a location page this month, in what order, and how it gets measured. You can buy depth from two firms and still have one structure, but only if someone holds it: one plan, one queue for page and template changes, one scorecard, one definition of a location. Without that, two deep specialists produce the collisions in the example above. With it, the choice between one provider and two is mostly about price, contract terms and how much coordination your team can carry.

So the default we would defend for 2027 planning: one accountable provider for both where you can find one that shows real work on each side, two providers under a single named owner where you cannot. The structure to avoid is two vendors, two plans and no owner.

How to check where you stand

Three checks, all doable before your next budget meeting. First, list every workstream in your SEO scope and in any AEO proposal, and mark each asset that appears in both. Second, ask your SEO agency to show a baseline of how often AI answers name your locations across a fixed prompt set, run more than once, and which third-party sources those answers cite. Third, ask who approves a change to the location page template today. If the answer is two different people, you have found the problem.

If your current SEO agency passes the second check, keeping them and extending the scope is probably your simplest path. If you want a second view, ElytraCo offers traditional SEO alongside AI visibility, and for multi-location and enterprise programs we review what you pay your current SEO provider and show how both can run under one strategy. The comparison covers equivalent services and is subject to qualification. Our published range is on the AEO pricing page. Start with the free AI visibility audit.

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