Explainer
What is an SEO agency? What it does, what it costs
What is an SEO agency? An SEO agency is an outside team you pay to grow your search traffic without paying per click. The job used to mean one thing: rank on Google. Now it means two, since more than half of B2B buyers start research in an AI chatbot before Google. This post covers the work, the cost, and what to ask before you hire one.
Key takeaways
- 51% of B2B buyers now start research in an AI chatbot more than in Google, up from 29% a year before.[1]
- When an AI Overview appears, the top ranking page gets 58% fewer clicks on average, a correlation, not a cause.[2]
- Keyword difficulty scores skip your own site's strength, so a low score is not a promise.[3]
In this article
What does an SEO agency do?#
An SEO agency grows the traffic your site earns from search, without ad spend. Four parts are old: technical (can engines crawl and read the site), content (do pages answer what buyers search), authority (do other sites link to or mention you), measurement (did anything move). One part is new: getting quoted inside AI answers, instead of only listed below them. Many agencies sell this before they can deliver it. We explain that newer work in LLM SEO. Looking for one? See our SEO agency services.
How do agencies charge?#
| Model | What you get | Fits | Risk |
|---|---|---|---|
| Retainer | A monthly fee for ongoing work | Content and links, which take months to pay off | You pay for activity even when nothing moves |
| Project or audit | One fixed price, one report | Finding what is broken before a monthly spend | A report nobody acts on |
| Done for you | The agency ships the changes itself | Teams with no developer or writer time | Costs more per month, but nothing sits in a backlog for a year |
What changed in 2026?#
Two things, both measured. G2 surveyed 1,076 B2B software buyers: 51% now start research in an AI chatbot more than in Google, up from 29% the year before, and 69% picked a different vendor than planned because of a chatbot.[1] Ahrefs checked 300,000 keywords and found the top ranking page gets 58% fewer clicks on average once an AI Overview appears, a correlation, not a proven cause.[2] A page can hold its rank while its traffic drops.
What should you ask before you hire one?#
What will you measure, and how often?
AI answers change between runs. One study found the sources an engine cites overlap by only 34 to 42% between two days in a row.[4] One screenshot proves nothing. Ask for repeated checks per engine.
Show me the fix list, not the score.
A visibility score is a thermometer, not a fix. Ask what changes on the site, who writes it, who ships it.
Which keywords, and how hard are they?
Ahrefs states plainly that difficulty scores come from links to pages that already rank, and skip your own site's strength.[3] A low score is not a promise.
What are you doing off our own site?
An agency that only edits your pages is doing half the job.
How much does SEO cost?#
There is no single rate. Agencies charge a monthly retainer, a fixed project or audit fee, or a done-for-you fee. Noetio has no list price: a 15-minute call sizes the work to your site, and you get the number in writing the same day.Paid search gives a floor: in our own pull of Google Ads keyword planner data for the United States, “seo agency” costs about $46 per click and “digital marketing agency” about $24.[5] Agencies pay that because one client is worth far more than one click. The question that matters is not the fee. It is what the fee buys: a report, or shipped changes and a new measurement.
If you want the full price picture for the AI side of the work, read GEO agency cost. Noetio works as the done for you kind of agency. We check where you stand across Google, ChatGPT, Perplexity, and Gemini, then ship the fixes ourselves. See our SEO services and AI SEO services, or compare us with a traditional SEO agency. The free check shows where you stand today.
FAQ
- What does an SEO agency do?
- An SEO agency grows the traffic your site earns from search, without ad spend. It fixes technical problems so engines can crawl and read the site, writes pages that answer what buyers search, earns links and mentions from other sites, and measures whether anything moved. Newer work is getting quoted inside AI answers.
- How much does an SEO agency cost?
- There is no single rate. Agencies charge a monthly retainer, a fixed project or audit fee, or a done-for-you fee. Noetio has no list price: a 15-minute call sizes the work to your site, and you get the number in writing the same day.
- Is SEO dead now with AI?
- No, but it now has two jobs: ranking on Google and being quoted in AI answers. G2 found 51% of surveyed B2B software buyers now start research in an AI chatbot more than in Google. Ahrefs found the top page gets 58% fewer clicks when an AI Overview appears, a correlation, not a proven cause.
- How do I choose an SEO agency?
- Ask what they will measure and how often, to see the fix list and not only a score, which keywords they target and how hard those are, and what they do off your own site. Be careful with any agency that promises a ranking or shows one screenshot as proof.
- What is the difference between an SEO agency and an AI SEO agency?
- A traditional SEO agency works to rank your pages in Google. An AI SEO agency does that and also works to get your pages quoted in answers from ChatGPT, Perplexity, Gemini and Google AI Overviews, which read different indexes and need their own checks.
- What are the benefits of hiring an SEO agency?
- You get the technical, writing and measurement skills in one team, so you do not hire each role yourself. A good agency also tells you what it will measure and ships changes to your site, instead of handing you a report to act on alone.
- What should I expect from an SEO agency?
- A plan for your site, regular reporting on a short list of measures you agreed on, and changes made to your pages. Ask what they will measure and how often before you sign.
- What is an SEO company?
- An SEO company and an SEO agency are the same kind of business: an outside team that works to grow the search traffic your site earns. The two words are used for the same thing.
- What is an SEO agent?
- People use the word in two ways. Some mean an SEO agency. Others mean a software tool that uses AI to do SEO tasks such as research or drafting. A tool is not a team that ships and measures changes on your site.
Want to see what an audit returns?
Sources
- G2, “The Answer Economy” 1,076 B2B software buyers plus 39 interviews, surveyed March 2026, published April 2026.
- Ahrefs, “AI Overviews Reduce Clicks by 58%” 150,000 keywords with an AI Overview vs 150,000 informational keywords without, February 2026. Correlational; vendor study.
- Ahrefs on Keyword Difficultystates that KD is computed from referring domains to the top ten pages and does not account for your own site's authority.
- “Don't Measure Once: Measuring Visibility in AI Search” arXiv:2604.07585. Source sets overlap by 34 to 42% between consecutive days.
- Noetio, Google Ads keyword planner data for the United States, pulled September 2026 via the DataForSEO search volume endpoint. Our own measurement, not a third party study.
Survey figures carry their sample sizes. Vendor studies are labelled, and the one figure that is our own measurement says so.
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