The short version
- Worth it if buyers in your category ask AI assistants for recommendations and the assistants currently name competitors; not worth it if they do not yet, or if the agency treats AI visibility as separate from search.
- Decide with three numbers: how often your buyer questions produce an AI answer that names a brand, how often that brand is you, and what a named recommendation is worth against a retainer, which published 2026 price guides put between about $1,500 and $50,000 a month.
- The cheapest way to find out is a repeated audit of your own questions across the engines, which any credible agency will run before selling you a program.
“Is a GEO agency worth it” is one of the few marketing questions the AI engines answer with a hedge, and the hedge is informative. Google’s AI Overview opens with “usually not worth it if they treat AI optimization as a separate fad from traditional search”. ChatGPT says “sometimes, yes, but most businesses do not need a full GEO agency yet”. Both are right, and both point to the same test: is AI search already where your buyers make up their minds?
What the AI engines answer
We put the question to ChatGPT, Google AI Overviews, Google AI Mode, Gemini and Perplexity 22 times between 15 and 25 September 2026.
- Every platform structured its answer as “when it is worth it” and “when it is not”, and every one made the verdict conditional on how much the audience uses AI search and on whether the agency builds on SEO or sells against it.
- Google AI Mode cited a Reddit thread in 22 of 22 runs, and Reddit was named inside 56 of the 110 answers, more than for any other GEO question tested. Buyers asking whether to pay for this are reading what other buyers say.
- ChatGPT’s most-cited source was academic research (14 of 22 runs), and it offered a rule of thumb: if organic-driven revenue is under about $20,000 a month, build the foundations before hiring a GEO agency.
- The People Also Ask box beneath the Google result was almost entirely about SEO anxiety: “is SEO dead now with AI?” (18 times), “can ChatGPT do SEO?” (12), “is GEO replacing SEO?” (12), “is AEO worth it?” (10). The real worry is whether money already spent on search has been wasted. It has not; the questions at the end of this guide explain why.
When a GEO agency is worth it
- Your buyers ask assistants. Search your ten most important buyer questions on ChatGPT, Perplexity and Google. If the answers name brands, a recommendation is being given to someone. If a competitor is named and you are not, the cost of doing nothing is already being paid.
- You have organic revenue to protect. Ranking pages are the ones Google’s AI Overview is most likely to cite: across 486 searches, 41.7% of pages ranking 1 to 3 were cited, against 20.1% at positions 7 to 10. A page that ranks but is not cited risks losing the click to the answer above it, and GEO work on that page has a return you can measure.
- Your category’s answers draw on a small set of pages. For the four GEO agency questions we tracked, a handful of pages were cited in 18 to 22 of 22 runs on Perplexity and Google. Where the source set is small and stable, entering it is worth more than where it churns.
- You can sustain it. The pages the engines cite are rarely thin: Perplexity’s had a median of about 3,700 words, against about 1,500 for pages it retrieved and skipped. Pages of that depth, and the third-party mentions around them, take months to build; a one-off project rarely gets there.
When it is not
- Your customers do not yet research with AI. Some local and trade categories still convert through the map pack and referrals; the audit will show AI answers that name nobody, or that name marketplaces. Spend on the foundations first.
- The agency sells GEO against SEO. Google’s own guidance says its generative features rest on the same fundamentals as search. An agency that proposes to skip ranking and “optimize for AI” is proposing to skip the main route into Google’s AI surfaces.
- Your organic revenue is small. If it is, a $5,000-a-month retainer is a large share of it, and the foundational work (a crawlable site, clear pages, a consistent business profile) is cheaper to do in-house or with an SEO partner.
- You want a guarantee. No agency controls the engines, and their sources move: for one of the queries we tracked, Perplexity’s sources changed completely from one day to the next. An agency promising a place in ChatGPT’s answer is promising what it cannot deliver.
The cost side
Published 2026 price guides range from about $1,500 to $50,000 a month. WebFX (opens in a new tab) (May 2026) splits the range by company size: $1,500 to $5,000 a month for small businesses, $5,000 to $25,000+ for mid-sized companies and $25,000 to $50,000+ for enterprises, with one-off projects at $5,000 to $50,000 and consulting at $50 to $300 an hour. Underneath’s programs are priced in three bands, $5,000 to $10,000, $11,000 to $20,000 and $20,000+ a month, and start with a Marketing & AI Visibility Audit whose fee is credited if you continue.
The retainer is not the whole cost. Someone on your side has to approve page changes, supply proof for the third-party outreach and read the monthly report; budget two to four hours a week for it.
The return side
The return is the value of being the named recommendation for the questions your buyers ask, multiplied by how often those questions are asked of an assistant, minus what you already earn from the same questions in ordinary search. Three numbers make it concrete.
| Number | How to get it | What it tells you |
|---|---|---|
| Answer rate | Run your ten buyer questions on each engine over several days; count how often the answer names a brand | Whether a recommendation exists to be won |
| Your share | Count how often that brand is you | The gap between where you are and where the winner is |
| Value of a recommendation | Your close rate and average deal or basket value for inquiries that arrive already shortlisted | What each point of share is worth per month |
If the answer rate is high, your share is low and a recommendation is worth more than the retainer within the sales cycle, an agency is worth it. If the answer rate is low, wait and re-measure in a quarter; the engines change quickly, and the audit is cheap to repeat.
Agency, in-house or wait
- Hire an agency when the audit shows competitors being named and nobody on your team has done this work before. Start with the audit, not a contract.
- Build in-house when you already have the tracker and the writing standards and need volume; Underneath hands these over at the end of every engagement.
- Wait when the audit shows AI answers that name nobody in your category. Fix the foundations and re-run the audit in a quarter.
Frequently asked questions
Is a GEO agency worth it?
Yes, when your buyers already ask AI assistants for recommendations, competitors are being named and you are not, and you can sustain the work for months. No, when your customers do not yet research with AI, when the agency sells GEO against SEO, or when your organic revenue is too small to carry a retainer of several thousand dollars a month.
How much does a GEO agency cost?
Between about $1,500 and $50,000 a month, according to published 2026 price guides; WebFX (opens in a new tab) puts mid-sized companies at $5,000 to $25,000. Underneath’s programs are priced in three bands, $5,000 to $10,000, $11,000 to $20,000 and $20,000+ a month, after an audit whose fee is credited if you continue. Add a few hours a week of your own team’s time.
Is SEO dead now with AI?
No. Google’s AI features are built on Google’s index, and ranking still raises the odds of a citation: in our study of 486 searches, the AI Overview cited 41.7% of top-three pages against 20.1% at positions 7 to 10. SEO gets you into Google’s AI surfaces; GEO works on whether the ranking page is the one quoted, and on the engines where ranking counts for less.
Is GEO replacing SEO?
No. They are complementary: SEO earns a position in the results, GEO earns a place in the answer, and the two should be measured together. Google’s guidance says the fundamentals are shared, and the AI answers to this very question warned against agencies that sell one against the other.
Is AEO worth it?
Answer engine optimization, the work of being the extracted answer in featured snippets and AI Overviews, is part of the same program. On Google’s surfaces it and GEO overlap almost completely; you do not need to buy them separately.
Can ChatGPT do SEO?
ChatGPT can draft content and suggest structure, but it cannot rank a page, earn a citation or fix crawler access. In Underneath’s tests ChatGPT cited academic research and official documentation for this question and rarely an agency; it is a source of advice, not of visibility.