Choosing a GEO Agency: How to Recognize Good AI Visibility Work

By Edip Kilinc, founder of Webwavers. Published October 31, 2026, last updated October 31, 2026. Reading time: about 16 minutes.

The Key Points in Brief

You recognize a good GEO agency by the fact that it measures visibility in ChatGPT, Perplexity and Google AI Overviews with fixed prompts, delivers a baseline before the project starts and guarantees no citations. It works on content, evidence, technology and external sources at the same time, and it tells you openly what it cannot influence.

• Ask for a baseline: the same 20 to 40 prompts, before and after, with date and tool.
• Distrust guarantees, miracle tools and mandatory files. Google itself says that no special markup is needed for AI features.
• Check method and evidence, not buzzwords: Who writes, who reviews, where do the numbers come from?
• Pay attention to contract term, data ownership and reporting.
• Lists and rankings of agencies are a starting point, but no proof of quality.

Table of Contents

1. What is GEO, and what does a GEO agency do?
2. What GEO cannot do
3. The 12 questions to ask every GEO agency
4. Agency types compared
5. Evaluating proposals: a scoring table
6. Red flags
7. What GEO costs: market ranges
8. How agency lists come about and how to read them
9. When you don't need an agency
10. How we do it
11. FAQ
12. Conclusion

What is GEO, and what does a GEO agency do?

GEO stands for Generative Engine Optimization. It means working to make your company appear in generated answers from ChatGPT, Perplexity, Gemini or Google AI Overviews, either as a named provider or as a cited source. The term goes back to a 2024 research paper (Aggarwal et al., KDD 2024). The authors show that methods such as backed-up statistics, direct quotations and named sources can increase visibility in generative answers by up to 40 percent, depending on the field. The test did not run on German-language Webflow sites, so the result is a reference point and not a guarantee.

Related terms are AEO (Answer Engine Optimization), LLMO and GAIO. In everyday use they mean the same thing: structuring content so that language models find it, understand it and cite it with a clear conscience. For a general introduction to the topic, see our article on Generative Engine Optimization.

What a GEO agency actually does can be broken down into six building blocks:

1. Analysis and measurement: What questions do your customers ask? In which answers do you appear, and in which do your competitors?
2. Prompt and topic research: Which questions are relevant to the business, and which are not?
3. Content: Pages that answer a question directly, with numbers, sources, tables and clear headings.
4. Technology: Crawlability, clean indexing, rendering, structured data, performance.
5. External signals: Directories, review portals, comparison lists, trade press. AI answers don't draw only from your website.
6. Monitoring and reporting: repeated measurement with fixed prompts, analysis, next steps.

If an agency offers only one of these building blocks, that is not automatically bad. But it should be clear who takes care of the other five.

What GEO cannot do

Before you compare proposals, you need a realistic picture. Three points up front.

GEO is not a separate path next to SEO. In its documentation on AI features, Google writes that no special requirements apply to appearing in AI Overviews and AI Mode beyond the familiar ones: The page must be indexed and eligible for snippets, content should be available as text, internal linking must be right, and crawlers must not be blocked. Structured data must match the visible text. So anyone who sells you a secret extra markup or a mandatory file is selling you something Google itself does not require. The llms.txt file is a special case: Google spokesperson John Mueller said in June 2025 that no AI system currently uses it. As one small, quickly implemented building block among several, it can still be included, but it is not a switch for visibility. More on this in our article on llms.txt and schema.

Nobody controls what a language model says. Answers vary from query to query and depend on the model, the location, the conversation history and the time. Serious agencies therefore talk about probabilities, trends and visibility rates across many prompts, not about positions as in a classic ranking.

Clicks are not the only currency. For December 2025, Ahrefs measured that the click-through rate at position 1 drops by around 58 percent when an AI Overview appears (300,000 keywords). At the same time, surveys show that buyers often still verify AI answers. Gartner states for 2026 that 69 percent of B2B buyers want to validate AI-generated insights with a sales representative. Visibility in the answer is therefore often the entry onto the shortlist, while the close happens later through the website, references and conversation. This also changes what you should expect from an agency: not just traffic, but mentions, sentiment and qualified inquiries.

The 12 questions to ask every GEO agency

You can copy these questions into a first call or a request for proposals. The columns on the right show what a solid answer sounds like and how to spot an evasive answer.

No.	Question	Solid answer	Evasive answer
1	How do you measure AI visibility?	Fixed prompt list, several models, repetition, metrics such as visibility rate, mention rate, citation rate	"We regularly check ChatGPT"
2	What baseline do I get before the project starts?	Measurement with date, tool and prompts, including competitors	No baseline, just a strategy slide
3	Which technical checks are included?	Crawling, indexing, rendering, performance, structured data matching the text	Only "build in schema" or "create llms.txt"
4	How do you decide what gets created new and what gets revised?	Prioritization by prompt relevance and gap, existing pages reviewed first	Blanket "20 new articles per month"
5	Where do the numbers and evidence in the texts come from?	Primary sources, own data, client approvals, source list	"AI generates our content" with no review process
6	What happens with sources outside my website?	Plan for directories, comparison lists, reviews, press	On-page only
7	What do you explicitly not promise?	No guarantee for citations or positions, clear limits of influence	Guarantees or top-3 promises
8	Who writes, who reviews for subject accuracy?	Names, roles, approval process with your subject experts	Anonymous pool
9	What does the reporting look like?	Monthly, raw data viewable, change versus the baseline	Dashboard without methodology
10	How long am I locked in, and what belongs to me at the end?	Notice periods open, content, access and data stay with you	Long term, content "in the tool"
11	Who implements changes on the website?	Clear responsibility, CMS access, coordination with your agency	"You do that yourself" without instructions
12	Which reference with context can you show?	Starting point, time frame, measurement method, result, what did not work	A single percentage with no frame of reference

A few questions deserve more space.

Questions 1 and 2: Measurement and baseline

This is the most important block. Without a baseline, nobody can prove that something has changed, neither the agency nor you. Good measurement means a fixed list of 20 to 40 prompts that reflect real customer questions, not just brand names. It also means several models (ChatGPT, Perplexity, Gemini, Google AI Mode), several repetitions per prompt because answers vary, and a clearly defined set of metrics. Vendors such as Ahrefs (Brand Radar), Semrush or Finseo offer tools for this. More important than the tool is the method behind it. How to trace this yourself is described in our article Measuring AI visibility.

A simple self-test before the first call: Ask the same ten questions your customers would ask in two models. Note which providers are named and which sources appear below the answer. You need this picture anyway to put the agency's answers in context.

Question 5: Evidence and sources

Language models cite content that can be backed up. The GEO paper names statistics, quotations and source references as the most effective methods. An agency that produces its texts without checking sources therefore produces the opposite of what gets cited. Ask about the process: Who researches, who checks numbers, how are sources documented? And ask how the agency handles the risk of mass pages. In its spam policies, Google names "scaled content abuse," meaning many pages that mainly serve rankings and offer little value, whether made by humans or AI. An agency that offers you 200 pages built from templates takes on this risk on your behalf.

Question 6: External sources

AI answers don't cite only company websites. For questions about providers, comparison lists, directories, review portals and trade articles often show up. An agency that works exclusively on your website covers one part of the problem. That is legitimate as long as it says so and someone else takes over the external side. More on this in the section on lists further below.

Question 7: What they don't promise

This test works reliably. An honest agency names limits without being asked: no influence on model training, no guarantee for mentions, fluctuations between queries, dependence on third parties. An agency that doesn't either hasn't understood how the systems work or doesn't want to tell you. This fits our guide on SEO agencies without ranking guarantees but with measurable lead goals, which describes the same logic for classic SEO.

Question 12: References with context

A number without a frame of reference is worthless. "300 percent more visibility" says nothing as long as the starting value, time frame, measurement method and sample are missing. Good references state what was measured, for how long, with which tool, and what did not work. Also check whether several numbers from the same agency are consistent with each other. Contradictory client figures on one page are a sign that nobody there does editorial review.

Agency types compared

Not every agency that offers GEO comes from the same direction. That affects where it is strong.

Type	Strength	Weakness	Fits when
Specialized GEO or AEO agency	Measurement methodology, tools, experience with prompt research	Rarely implements the website itself, extra coordination needed	You have a good development team or a permanent web agency
SEO agency with a GEO offering	Technology, keyword data, content processes	GEO often bolted onto existing packages	You want SEO and GEO from one source and have content capacity
Web agency with a growth practice	Design, technology and content in the same team, fast implementation	Less tooling depth than pure specialists, depending on the provider	You are planning a relaunch or are rebuilding pages anyway
Consultant or individual	Flexible, cheaper hourly rate	Capacity, substitution, breadth	You need an audit or sparring, not ongoing implementation
In-house team	Closeness to the product, fast approvals	Takes time to build, tools and know-how cost money	You have content and SEO roles and want to expand them

The honest answer is often: It depends on your starting point. If the website is technically outdated, the best prompt analysis achieves little as long as nobody can rebuild the pages. If your website is good but nobody mentions you in comparison lists, you need outreach more than new texts. To decide whether to outsource or build in-house, the comparison SEO agency, freelancer, consultant or in-house helps. To decide between ongoing support and a one-off project, see the comparison SEO and GEO as a retainer or a one-off project.

Evaluating proposals: a scoring table

If you have two or three proposals, a simple scoring helps. Give 0 to 2 points per criterion (0 = missing, 1 = partly, 2 = clearly documented). Weight according to your situation.

Criterion	Weight (suggestion)	Proposal A	Proposal B	Proposal C
Baseline and measurement method documented	3
Honest limits, no guarantees	3
Process for evidence and sources	2
Technology and indexing check	2
Plan for external sources	2
Reporting with raw data	2
Reference with context	2
Term, cancellation, data ownership	2
Named contact persons	1
Fit with your system (Webflow, WordPress, TYPO3, headless)	1

Multiply points by weight and add them up. The maximum is 40 points. Below 24 points, at least one basic pillar is usually missing. The number is a rule of thumb from practice, not a standard. More important than the total is which rows stay empty for a proposal.

Red flags

• Guarantees: "Guaranteed to be named in ChatGPT" cannot technically be delivered.
• Secret methods: If the core of the offer is a file or markup that Google and other providers don't require, ask for the source.
• Pure tool dashboard: A colorful score without a prompt list, model, date and repetitions is hard to verify.
• Volume instead of value: Hundreds of generated pages are a risk for the entire domain.
• Missing author, missing date: An agency that shows no author and no date on its own website asks you for trust without providing any trust signals itself.
• Contradictory numbers: Client figures that differ on the same page point to a lack of review.
• Long lock-in with no exit: Especially critical if content or access sits with the agency.
• Not a word about limits: If there is never a "but," experience is usually missing.

What GEO costs: market ranges

Prices for GEO are still young and vary widely. The following values come from public sources in 2026. They are a guide for conversations, not a price list. Several sources are vendor blogs with a vested interest, which is noted each time.

Model	Range	Source and context
GEO setup, one-off (agency)	approx. €3,500 to €8,000	Blck Alpaca, August 2026. Assumptions of the article, not independently verified
GEO retainer (agency)	approx. €1,200 to €2,500 per month	Blck Alpaca, August 2026. Includes monitoring, content updates, reporting
Performance model	approx. €800 to €1,200 per month plus bonus	Blck Alpaca. Bonus amount not stated
In-house effort (time and tools)	approx. €712 to €1,032 per month	Blck Alpaca, internal calculation with an €80 hourly rate
Ongoing SEO support (agency)	approx. €1,000 to €8,000 per month	Evergreen Media, 2026, depending on city size and competition
SEO strategy initial phase (agency)	approx. €10,000 to €20,000 one-off	Evergreen Media, October 2026
Hourly rate SEO consultant (DACH)	approx. €80 median, range €60 to €100 for freelancers	Freelancermap, September 2026
Hourly rate agencies	€90 to €200	Freelancermap, September 2026

Three things about this matter. First: The ranges for setup and retainer are small compared to the cost of a website, but they add up over time. Second: A low price can mean that only monitoring is delivered, a high one that texts, technology and outreach are included. Compare services, not totals. Third: Most sources are vendors describing their own packages. Treat the values as a bandwidth and ask for a proposal with a clear description of services.

Whether a retainer makes sense or a one-off project is enough is covered in the comparison SEO and GEO as a retainer or a one-off project.

How agency lists come about and how to read them

When you ask ChatGPT or Perplexity for "the best GEO agencies," the names it gives often come from lists and comparison pages. These lists work very differently. An analysis of typical pages from the German-speaking region (as of October 31, 2026) shows three patterns:

Type	Example	How an agency gets in	What to watch for
Directory with membership	Some directories	Membership and reviews. In some cases the top spots are paid partnerships	Ranking partly follows payments, methodology only roughly described
Editorial list	Editorial comparison pages	No submission, the editorial team researches. A stated GEO service on the agency's own website is implicitly a requirement	Sometimes the operator itself is in first place, usually with disclosure
Criteria-based list	Criteria lists, e.g. for branding agencies	Based in the DACH region, core service, verifiable B2B projects, team size. Reviewed twice a year	Sometimes the operator itself is on the list, independence not always documented

What you can take from this: A list is a hint about who is visible, not who works best. Good lists disclose which criteria they select by, when they were last reviewed and whether the operator is involved itself. Check this before you use a ranking as a basis for a decision.

For the agencies themselves, this creates a task that is often overlooked: Anyone who wants to be recommended in AI answers also has to show up where the models pull their recommendations from. That is part of good GEO work and belongs in question 6 of your checklist.

When you don't need an agency

An agency doesn't pay off in every situation. You can try it yourself first if:

• Your website is technically clean and you have content capacity. Then a baseline, a priority plan and a quarterly review with an external person are often enough.
• Your market is very small and regional. There, reviews and recommendations matter more than a broad content strategy.
• You don't have a clear positioning yet. GEO amplifies what is there. If the message is blurry, citations will be blurry too.
• Your budget only covers one-off engagements. An audit with an implementation plan is then better than a retainer that gets canceled after three months.

Also ask yourself whether you have the problem at all. First check whether your site is cleanly indexed in regular Google search and whether the core pages answer the most important questions directly. For many companies, the biggest lever lies in three to five pages, not in a large program. You will find an introduction to how to approach this in our article Showing up in ChatGPT.

How we do it

Disclosure: We are ourselves a provider of GEO and SEO and therefore part of this market. You should read this guide the way you read any source with a vested interest. The questions and the table apply to us as well.

Webwavers is a premium agency for branding, web design and web development, founded in 2021 in Günzburg with a second location in Munich. We are one of seven Webflow Premium Partners in Germany and also work with WordPress, TYPO3 and headless systems. At our company, GEO is part of the Growth area, right next to SEO, conversion and maintenance. The possible advantage: Design, development and content come from one agency, so changes to pages go through fewer handoffs. The disadvantage: Anyone who wants only tool monitoring without website work is better off with a pure specialist agency.

Typically, GEO runs like this: first queries on your customers' questions and a technology check as the baseline, then remove blockers and make the most important pages citable, then expand source presence and measure on an ongoing basis. How this looks at our company is on the page GEO and AI visibility. If you want to test us against the twelve questions, please do.

FAQ

What is a GEO agency?

A GEO agency makes sure your company appears in answers from ChatGPT, Perplexity, Gemini and Google AI Overviews. It measures current visibility, revises content and technology, builds pages that can be backed up and takes care of sources outside your website. It cannot give a guarantee for citations, because nobody controls what a language model outputs.

How do I recognize a reputable GEO agency?

Reputable agencies deliver a baseline with fixed prompts, name their measurement method, promise no positions or citations and disclose responsibilities, term and data ownership. They show references with starting value, time frame and measurement approach. If they don't mention limits or sell mandatory files that Google doesn't require, caution is in order.

How long does it take for GEO to work?

There is no fixed deadline. Technical fixes and revised pages can show up in answers within weeks if they get crawled. Building external sources and brand awareness takes longer. Plan for several months before a first reliable statement, and have the measurement repeated with the same prompts.

What does a GEO agency cost?

Public sources from 2026 cite about €3,500 to €8,000 for a one-off GEO setup and about €1,200 to €2,500 per month for a retainer (Blck Alpaca, August 2026). According to Evergreen Media, ongoing SEO support costs €1,000 to €8,000 per month. The values come from vendors, so compare services and not just totals.

Do I need an llms.txt for GEO?

It isn't necessary, but it can still be useful. In June 2025, Google stated that no AI system currently uses this file, and the official documentation on AI features doesn't require it. It is a small, quickly implemented building block among several: Include it, but don't expect miracles. It is not a switch for visibility and doesn't replace good content, clean structure or indexing. Pages that answer questions directly matter more.

Isn't SEO enough?

For Google AI Overviews and AI Mode, according to Google, regular SEO is the foundation. In addition, it is worth building content so it can be cited, meaning with direct answers, numbers, sources and tables, and thinking about external sources too. The difference lies less in the technology than in the perspective: It is about mentions and citations, not just clicks.

How do I measure whether the agency delivers anything?

Compare a fixed prompt list before and after the work, with the same models and several repetitions. Track visibility rate, mention rate and citation rate. Add data from Search Console and Analytics, such as inquiries with the source AI assistant. Ask for raw data, not just a score.

Should I choose an agency with a GEO guarantee?

No. No agency can control the answers of language models. Guarantees are a warning sign of ignorance or of marketing without substance. More useful are agreements on services, processes and measurements, plus a clear plan for what happens if visibility doesn't develop as expected.

Conclusion

You recognize a good GEO agency by method, openness and evidence, not by promises. Ask for a baseline, check how content is created and which sources are used, and have the limits named. Use the twelve questions and the scoring table to make proposals comparable. And before you commission anyone, check whether the foundations of your website are right. GEO builds on good SEO. It doesn't replace it.

Support with GEO: If you are looking for help with measurement, content and technology, you will find our offer on the page GEO and AI visibility.

Sources

1. Aggarwal et al.: GEO, Generative Engine Optimization (KDD 2024)
2. Google: AI features and your website
3. Google: Spam Policies for Google Web Search
4. Google: General structured data guidelines
5. Search Engine Roundtable: Google zu llms.txt, Juni 2025 (Google on llms.txt, June 2025)
6. Ahrefs: AI Overviews Reduce Clicks, Update 2026
7. Gartner: 69 Prozent der B2B-Käufer validieren KI-Erkenntnisse beim Vertrieb, 20.05.2026 (69 percent of B2B buyers validate AI insights with sales, May 20, 2026)
8. Blck Alpaca: Was kostet GEO für KMU wirklich, 2026 (What GEO really costs for SMBs, 2026)
9. Evergreen Media: SEO Kosten, 2026 (SEO costs, 2026)
10. Freelancermap: SEO-Stundensätze, September 2026 (SEO hourly rates, September 2026)
11. agenturtipp.de: GEO-Agenturen
12. COSEOM: Beste GEO-Agentur
13. SANMIGUEL: B2B-Branding-Agenturen im DACH-Vergleich (B2B branding agencies compared, DACH)

Change log: Published October 31, 2026. Prices and list status as of October 31, 2026.