Choosing a GEO agency: questions, red flags, expectations

When is a GEO agency worth it?

An agency is worth it when you lack measurement and implementation in-house. GEO combines several disciplines: technical SEO, content, digital PR and data analysis. Few marketing teams in mid-sized companies cover all four. If you already have a strong SEO team, an audit with a clear roadmap is often enough.

Before you start looking, decide which questions your customers ask AI search tools. These questions later become the prompt set you use to judge every agency. Our explainer What is GEO? covers the basics.

Plan internal time as well. Many GEO measures end up on your website: new content, technical changes, approvals. Without capacity for approvals in your own team, any roadmap will stall.

What should the service include?

The service pages of German GEO agencies look similar at their core. Most of the agencies we reviewed for our ranking list these building blocks:

• AI visibility analysis: how often and in what context do AI search tools mention your brand today?

• Prompt set: a fixed list of questions that is queried regularly.

• Technical basics: access for crawlers such as OAI-SearchBot and PerplexityBot, indexing, structured data.

• Content: pages that answer questions directly and cite evidence.

• External signals: mentions in trade media, directories and comparisons.

• Reporting: mention rate, share of voice, cited sources and AI traffic over time.

Many agencies stress how much classic SEO work is involved. Seokratie, a Munich agency, puts it this way on its service page (our translation):

Which questions should you ask?

Good questions separate method from marketing. In “Do you need an SEO?”, Google Search Central recommends asking about past work, how success is measured and the expected timeframe. For GEO, we add questions about measurement in AI search.

Also ask for a sample report (a redacted one is fine). It shows how the agency works faster than any pitch deck.

What does a good report look like?

A good report shows trends, not snapshots. Because AI answers vary with every query, a single data point says little. Meaning only emerges when the same prompt set is queried the same way over weeks and months.

A monthly GEO report should include at least the following:

• Mention rate: in how many answers does your brand appear, per platform?

• Share of voice: how often are you named compared with competitors?

• Cited sources: which of your pages and which third-party pages do AI search tools link?

• AI traffic: visits from ChatGPT, Perplexity and similar sources in your web analytics.

• Actions: what was implemented during the period, and what comes next?

Also insist that the agency does not change the prompt set without agreement. Otherwise months cannot be compared.

What are the red flags?

The strongest red flag is a guarantee. Google is unambiguous about this:

This applies even more to AI search, because answers vary widely. Watch for these further signals:

• No details on measurement: an agency that does not explain how it measures cannot prove success.

• Files sold as a cure-all: Google lists no additional requirements for AI Overviews, neither AI text files nor special markup.

• Opaque changes: Google advises avoiding agencies that do not clearly explain what they will change on your site.

• Excessive access: according to Google, read access to Search Console is enough for an audit.

What is realistic?

AI visibility grows slowly and fluctuates. A SparkToro analysis from January 2026 shows the scale. When prompts were repeated, ChatGPT and Google's AI features in Search returned the same list of brands in less than 1 percent of runs. A realistic goal is therefore a rising share of mentions over months, not a fixed position.

Agencies themselves temper expectations too. Aufgesang recommends at least six months of ongoing work on its service page before results can be measured. Seokratie writes that GEO is not a performance channel with a daily conversion curve.

Prices vary widely. Some agencies publish entry prices for audits or ongoing support, many publish none. Compare proposals by scope and hours, not just by the monthly fee.

How to run the selection

1. Set goals: which products and questions matter most for your revenue?

2. Draft a prompt set: agree ten to twenty questions with your sales team.

3. Build a shortlist: pick three agencies with a transparent measurement method.

4. Hold interviews: use the questions above and record the answers in writing.

5. Start small: begin with an audit or a short contract term.

Record the interviews in a simple table: one row per agency, one column per question. That way you compare answers rather than impressions.

Our ranking The best GEO agencies in Germany 2026 offers a starting shortlist. The page How we work and rate explains our criteria. For your own checks between reports, see our overview of AI visibility tools.