GEO Agency vs SEO Agency: Who Should a Shopify Brand Hire?

Quick answer: For most Shopify stores this is not an either-or choice. Google says that, from its side, optimising for AI Overviews and AI Mode is still SEO, and a page must be indexed and eligible for a snippet before it can appear in them, so the SEO work comes first. Hire one team that does SEO properly and can show in writing what it would do differently for ChatGPT and other assistants, and add a GEO specialist only if that team cannot. Walk away from anyone who sells GEO as a replacement for SEO or promises citations, and note that Prism3 sells both, which is explained below.

If an agency has burned you before, “GEO” probably reached your inbox this year as a new line item: a new acronym, a new retainer, and a promise that your store will be “recommended by ChatGPT”. It is reasonable to wonder whether that is a real discipline, a rebrand of SEO, or a bit of both.

The answer is checkable, because Google has published how its AI features use web pages, and OpenAI and Perplexity have published how their crawlers work. This guide uses those documents to help you decide who to hire, what to ask before you sign, which claims are red flags, and how to read the reports afterwards. It is a hiring guide, not an explainer; for the plain-language difference between the two disciplines, start with SEO vs GEO: the real difference.

A conflict you should know about first

Prism3 sells SEO, GEO and CRO. We sell GEO alongside SEO, not on its own. That means I benefit if you decide you need both.

So here is how I have tried to keep it honest. Every claim about Google, OpenAI or Perplexity comes from their own documentation, and I name the page and the date I read it (31 October 2026). I give no fee ranges, because a number without your store’s scope behind it is not useful. And every question in this guide applies to us too: ask us the same things, in writing, before you decide.

What each type of agency sells

An SEO agency works on how your store is found in search engines: crawling and indexing, collection and product pages, content, and tracking organic revenue. Our guide to choosing a Shopify SEO agency in Australia covers that side in detail.

A GEO agency (generative engine optimisation, sometimes “AEO” for answer engine optimisation) focuses on visibility inside AI answers: Google’s AI Overviews and AI Mode, ChatGPT, Perplexity, Gemini and similar. Whether that is a second job or the same job is the real question, so start with what Google says.

What Google says about the line between GEO and SEO

Google published “Google’s Guide to Optimizing for Generative AI Features on Google Search” (last updated 10 July 2026, as read on 31 October 2026). Four points from it matter to a buyer.

1. Google treats GEO and AEO as SEO. The guide says that from Google Search’s perspective, optimising for generative AI search is optimising for the search experience, and so is still SEO. It adds that if you are considering third-party GEO or AEO advice or services, you should review Google’s guidance on evaluating third-party SEO advice.

2. The AI features run on the normal ranking systems. Google says AI Overviews and AI Mode are rooted in its core Search ranking and quality systems. They pull relevant pages from the Search index and may run several related searches at once (“query fan-out”) to find supporting pages.

3. There is no extra gate. A separate Google page, “AI features and your website” (last updated 10 December 2025), says a page must be indexed and eligible to be shown in Google Search with a snippet to appear as a supporting link, with no additional technical requirements and no special optimisations necessary. Meeting every requirement still does not guarantee a page is crawled, indexed or shown.

4. Several popular “GEO hacks” are called out. The guide says that for Google Search you can ignore chunking your content into tiny pieces, writing in a special way for AI, chasing inauthentic mentions across the web, and treating structured data as a requirement. It also says Google Search does not use llms.txt or other AI text files: you can keep them for other services, but they will neither help nor harm your Google visibility. (We cover that on Shopify in llms.txt on Shopify.)

Google’s hiring page for SEOs (“Do you need an SEO? Tips for hiring an SEO”, last updated 5 June 2026) lists optimising for generative AI among the services SEOs provide. It also suggests asking any SEO who offers AEO or GEO advice whether it is aligned with Google’s official guidance.

Put plainly: if the goal is to appear in Google’s AI features, a good SEO agency is doing the job, and an agency claiming a secret method has to explain it.

Where a separate GEO offer can still be reasonable

Google’s guidance covers Google. Other assistants have their own rules, and the documentation points to a short list of differences that a competent team should be able to name.

• Different bots, different switches. OpenAI’s crawler page (read 31 October 2026) says OAI-SearchBot surfaces sites in ChatGPT’s search features, and a site that opts out will not be shown in ChatGPT search answers, though it can still appear as a navigational link. GPTBot is a separate, independent control that relates to training. ChatGPT-User handles actions a person starts, and robots.txt rules may not apply to it. Perplexity’s page describes PerplexityBot (search results) and Perplexity-User (user actions, which generally ignores robots.txt). OpenAI says robots.txt changes can take about 24 hours to take effect for search.
• Measurement outside Google. Search Console covers Google’s AI features. For ChatGPT and others you need your own analytics and a sound sampling method (more on that below).
• Product data. Google’s guide says Merchant Center feeds can help products show in AI responses. Shopify’s help centre adds that stores selling through agentic storefronts such as ChatGPT have product data sent through Shopify Catalog independently of robots.txt.

None of that is a reason to hire a second agency by itself. It is a reason to ask your SEO team, “Who looks after this, and how would you check it?”

Which should you hire? A decision guide

Use your situation, not the job title on the proposal.

Check your own category before you pay for anything

1. Pick ten searches a buyer of your product would type and run them on Google in the country you sell in. Google says AI Overviews show only where its systems judge them additive to classic search, and often do not trigger, so a blank answer is common.
2. Ask the same questions in ChatGPT and Perplexity, several times, on different days. Answers vary, as the data below shows.
3. Open the Generative AI performance report in Search Console if you can see it. Google’s help page says it shows your impressions in AI Overviews and AI Mode by page, country, device and date, and was rolled out to all websites worldwide as of 31 August 2026. It may not appear if your site has had too few impressions in these features.
4. Write down what you found. “No AI answers in my category” and “competitors are named and we are not” are different problems.

Seven red flags (and what the documentation says)

A few more, which burned founders usually meet in the contract rather than the pitch:

• A lock-in of 12 months or more before there is any evidence. Be wary. Prism3 engagements are month to month.
• No change log. If an agency edits your theme, redirects or robots file, you should get a record of what changed and why.
• Wanting more access than the job needs. Google’s hiring page advises granting only read access to Search Console during an audit stage, and says that ultimately you are responsible for the actions of companies you hire.
• Reporting that tracks only vanity numbers. “AI visibility score” with no definition, no prompts and no link to orders.

For the general version of this list, see Shopify SEO agency red flags and Shopify agency red flags to check before you sign.

Why the guarantee is the biggest tell

Google’s hiring page says no one can guarantee a #1 ranking, and its guidance on third-party tools says tools cannot guarantee performance because they have no access to Google’s internal ranking data.

For AI assistants the position is weaker still. SparkToro (January 2026) had 600 volunteers run 12 prompts through ChatGPT, Claude and Google’s AI features 2,961 times. It reports under a 1 in 100 chance of ChatGPT or Google’s AI giving the same list of brands in any two responses (Claude was only slightly more likely to repeat itself), and says you would need roughly 1,000 runs before seeing two lists in the same order. It is not a peer-reviewed study, the data was collected in November and December 2025, and the author discloses that his research partner works at an AI-tracking startup. Treat it as a strong warning about single answers, not a final word. If answers change every time you ask, nobody can honestly sell you a fixed outcome.

Twelve questions to ask before you sign

Send these in writing and ask for written replies.

Scope and method

1. Which official documents does this recommendation rest on? Google’s hiring page suggests asking whether an SEO’s AI advice is aligned with Google’s official guidance. For GEO, ask about Google’s generative AI guide, OpenAI’s crawler page and Perplexity’s.
2. What would you do for GEO that you would not do for SEO, and what is the same work? A good answer admits the overlap and names specifics such as bot access, product data and measurement. A bad one is a secret method.
3. What will you not do? Listen for: no mass-produced pages, no bought mentions, nothing that shows search engines different content from users.
4. Can I see a redacted change log from a past engagement? This shows how they work and whether they explain what they change.

Evidence

5. Show me a Shopify store in a similar category, with the source and date window for each number. “Citations went up” without prompts, run counts and dates is not evidence. A past result is not a forecast for your store, either.
6. Can I speak to a past client? Google’s hiring page recommends checking references.

Measurement

7. Which prompts will you track, how many times will you run each, from which country, and how often? A single run tells you very little (see the worked example below).
8. What will you report from my own accounts? Look for the Search Console Generative AI performance report, AI-assistant referrals in GA4 (see how to track ChatGPT traffic in GA4 on Shopify) and Shopify orders.
9. What will the report say if nothing moves? An agency that has only ever shown good news is not reporting.

Access and control

10. What access do you need, at what level, and for how long? Start with the narrowest level that lets them do the job.
11. Will you edit robots.txt.liquid, theme code or apps? Who approves each change? Shopify says editing robots.txt.liquid is an unsupported customisation that Shopify Support cannot help with, and that incorrect use can cost you all your traffic.
12. What happens if I stop? Who owns the content, accounts and data?

Our own answers, so you can compare

We are month to month with no lock-in, and we do not guarantee rankings or AI-assistant citations. We give a progress report every two weeks and a monthly stakeholder report tied to revenue and conversion outcomes. On AI tools, we use them for data analysis, reporting, documentation, project management and routine execution. Strategy and judgement stay with people: Talha and our growth operators. You deal with the person doing the work. See what our GEO service includes.

How to read GEO reporting: a worked example

This is illustrative arithmetic, not a Prism3 or client result. It shows why the number of runs matters.

Say a monthly report says your brand’s “AI visibility” rose from 18% to 23% on a tracked prompt. Suppose it was run 60 times each month: your brand appeared in 11 of 60 answers (about 18%) and then 14 of 60 (about 23%).

With a simple binomial approximation, 60 runs leaves roughly 10 percentage points of uncertainty either side of each figure, and about 14 points on the difference between them. A five-point change sits well inside that. It is not proof of progress, and it is not proof of decline.

Now pool 25 prompts at 60 runs each, 1,500 answers a month. The same 18% and 23% become 270 and 345 appearances. The uncertainty on the difference drops to about 3 points, so a five-point change starts to look real. Prompts are not independent and assistants change their models, so even this is only a guide.

Three rules follow:

• Ask how many prompts and how many runs sit behind every percentage.
• Compare visibility across many prompts, not rank position in one answer. SparkToro’s author concluded that ranking position in AI answers carries little meaning, while visibility averaged over many runs was a more reasonable proxy.
• Tie it to your own data. Impressions in Search Console, referral sessions in GA4 and orders in Shopify are numbers you can check without the agency.

Access: what to give, and what to keep

• Search Console. Google’s permissions page describes owners (full control, including adding and removing users), full users (view all data and take some actions such as submitting sitemaps) and restricted users (view most data). Keep your own verified ownership, and give an agency the lowest level that fits the task. Domain, Shopify, Search Console and analytics should all sit in your name.
• Shopify. If an agency is a Shopify Partner, it can request collaborator access using a code you generate. You approve each request on the Users page, can edit the permissions and can remove the account. Shopify says access also expires after 90 days without a login.

To prepare before you start any conversation, see what to prepare before hiring a Shopify SEO agency.

When one team doing both makes sense

For a store between roughly $150K and $1M in revenue, one team usually makes sense, for three reasons.

1. It is the same pages. Titles, collection copy, product data, internal links and robots rules serve both Google and the AI assistants. Two vendors working on the same templates need a referee.
2. Google’s AI features rest on the same ranking systems. Splitting the work in two buys a handoff, not a different skill.
3. One change log and one report. You can see what changed and what moved.

Two teams make sense in these cases:

• You are happy with an existing SEO team that has no capacity or interest in measuring AI visibility, and you want a narrowly scoped, time-limited measurement project.
• You want an independent check on the team doing the work. This is a real concern for us, because we sell both the fix and the monitoring. Whoever you hire, keep your own Search Console and GA4 access so you can verify their numbers without asking them.

For a store with no working SEO foundations, hiring “GEO” first is the wrong order. Fix indexing, duplicates and thin collections, then look at AI visibility.

Key takeaways

• Google says optimising for generative AI search is still SEO. Pages must be indexed and snippet-eligible, and there are no additional requirements for AI Overviews or AI Mode (as read 31 October 2026).
• Other assistants have their own crawlers and rules: a short list of tasks, not a different industry.
• For most Shopify stores, one team doing SEO well and measuring AI visibility beats two vendors.
• Treat any guarantee of rankings or AI citations, “SEO is dead” pitches, llms.txt as the main deliverable, mass-produced pages and bought mentions as red flags.
• AI answers vary run to run. Ask how many prompts and runs sit behind every percentage.
• Give agencies the narrowest access that works, own your accounts and get a change log.
• Prism3 sells SEO and GEO, with GEO sold alongside SEO. Ask us the same twelve questions.

FAQs

What is the difference between a GEO agency and an SEO agency?

An SEO agency works on how your store is found in search engines. A GEO agency targets visibility in AI answers such as AI Overviews, ChatGPT and Perplexity. Google says the first covers the second for its own AI features, so the differences are mainly other assistants’ bots, product data and measurement.

Can my SEO agency do GEO?

Often yes, if it can answer the twelve questions above: what it does differently for non-Google assistants, which documents it relies on, and how it measures AI visibility with enough runs to mean something. If it cannot name specifics, a narrowly scoped GEO audit from someone else may be worth buying.

Can any agency guarantee my brand appears in ChatGPT or AI Overviews?

No. Google’s hiring page says no one can guarantee a #1 ranking, and its AI features page says indexing and serving are not guaranteed even when every requirement is met. SparkToro’s January 2026 study found AI tools rarely give the same list of brands twice. Prism3 does not guarantee rankings or AI-assistant citations.

Do I need llms.txt or special schema to be cited?

Google says Google Search does not use llms.txt and that no special schema.org markup is needed for AI features. You can keep an llms.txt for other services, but Google says it neither helps nor harms visibility in Google Search. Neither OpenAI’s nor Perplexity’s crawler page (read 31 October 2026) says llms.txt changes whether your site appears in their results. Both publish an llms.txt for their own documentation, which says nothing about how they treat yours. Treat it as optional.

How do I measure whether GEO is working?

Use first-party data: the Generative AI performance report in Search Console (impressions in AI Overviews and AI Mode), AI-assistant referral sessions in GA4, and Shopify orders. For sampled prompts, insist on many runs per prompt and a stated country and date.

Not sure whether you need SEO, GEO or neither?

Prism3 sells GEO alongside SEO, never on its own, and I would rather you test us with the questions above than take our word. You can read how our GEO service works, and if you want a second opinion on your store first, tell us about your store or book a free 30-minute diagnostic. We look at your store, and at what the AI assistants say about your category, before we recommend anything. No pitch.