Best GEO Agencies in France: The Comparison and Decision Grid

Since late 2023, searches for "best GEO agencies" have exploded, but the rankings they surface are almost all built on sand: sponsored leaderboards, lists copied from one blog to the next, SEO agencies that bolted three letters onto their homepage. Yet GEO (Generative Engine Optimization) is a young discipline, only formalised in late 2023 in an academic paper presented at the ACM SIGKDD conference. Picking a provider from a frozen ranking is like picking a doctor off a billboard. The right question is not "who is number one?" but "how do you recognise an agency that can actually make a brand citable by ChatGPT and Google AI Overviews?". This comparison hands you the grid: eight concrete criteria, a table to decide, the questions to ask and the traps to avoid. You walk away able to assess any agency, not with a list that will be out of date by next quarter.

Why a grid rather than a ranking

A ranking of GEO agencies goes stale fast, often depends on an advertising budget and never evaluates your case. A criteria grid, on the other hand, lets you judge any agency on what truly matters: its method, its deliverables, its metrics. It is the tool that outlives fashions.

I have watched enough providers come and go to know that a leaderboard reassures but does not help. First because the field is new: most agencies that claim GEO today were doing SEO eighteen months ago, and not all of them have rebuilt their method. Second because a ranking answers a generic question ("who is good?") when yours is specific ("who is good for my trade, my budget, my starting point?"). Finally because answer surfaces move fast: in 2025 Google published its official recommendations for succeeding in AI-assisted search, a sign that the rules are shifting and that a frozen agency falls behind.

The grid answers all of that. You apply it to three agencies in one afternoon, you compare them on the same lines, and you decide on facts rather than on reputation. It is exactly the approach we recommend for any purchase of an intangible service: make it objective before you sign.

What a GEO agency actually does

A GEO agency works on a brand's visibility inside the answers written by generative AIs (ChatGPT, Google AI Overviews, Claude's web search). Where SEO ranks a page in the links, GEO (Generative Engine Optimization) aims to make your content the source the model cites. Concretely: measure citability, produce citable content, organise it to signal authority.

Before comparing, we need to agree on the object. GEO does not replace SEO, it adds on top of it. Generative engines pull their answers from the indexed web: without a sound SEO base, there is nothing to cite. But once that base is laid, the work changes nature. You no longer just optimise a page so it climbs; you optimise each passage so it stands on its own and makes the model want to reuse it. The founding academic paper showed it back in 2023: adding credible sources and quantified statistics clearly increased a piece of content's visibility in the generated answer.

A serious GEO agency therefore covers three moves: it measures your current citability across a panel of business queries, it produces content in the format models like (direct answer, proof, named source), and it organises that content into clusters to signal your authority on a topic. If any one of the three is missing, the service is wobbly. It is the job of a GEO agency to orchestrate that presence across every answer surface.

Comparing GEO agencies means weighing criteria, not following a leaderboard. The grid replaces impression with measurement.

The grid of 8 criteria, dimension by dimension

Eight criteria are enough to tell GEO agencies apart: real citability measurement, a quantified opening audit, production in a citable format, semantic internal linking, named sources, a cadence held over time, transparency about method, and reporting on the right metrics. An agency that ticks all eight is serious; one that misses several is selling SEO under a new label.

1. It measures your AI citability, not just your Google positions

A real GEO agency's first reflex is to test what ChatGPT and AI Overviews already say about you, across a panel of real business queries. If all you hear about is keywords and positions, you are facing an SEO agency. Citability is measurable: how many queries cite you, where in the answer, and ultimately who is cited in your place.

2. It delivers a quantified, reproducible GEO audit up front

Before any production, a serious agency lays down a diagnosis: where your citability stands today, which queries to prioritise, which gap to close. That audit must be quantified and reproducible, not a PDF of impressions. It is what then justifies every piece of content produced. Our own GEO audit method spells out what an actionable diagnosis looks like.

3. It produces content in a citable format

A piece of GEO content does not look like a thousand-word article optimised for a keyword. It opens each section with a clear, direct answer, gives a quantified proof, names its sources with a deep link. Google reminds us, in fact, that the foundation remains useful, reliable content written first for people, not for the algorithm. Ask to see a sample of production: the format gives the method away.

4. It practises semantic internal linking and cluster architecture

Producing isolated pieces is not enough. A GEO agency organises articles into topic clusters connected by internal links, to signal to engines and to models that you carry authority on a subject, not just on a single page. Internal linking also distributes credibility toward your strategic pages.

5. It names its sources and never produces hollow content

This is the most discriminating criterion. Models cite content backed by verifiable data and named sources, and overlook vague text. An agency that produces "according to the experts" and unsourced claims works against you: it manufactures content the AI will ignore. Demand real sources, deep-linked and up to date.

6. It holds its cadence over time

Authority is built by steady accumulation, not by a one-off flourish. A GEO agency must be able to produce a sustained volume, ideally at least ten or so pieces a month, and to hold that pace over months. Regular production capacity is often what separates a pretty promise from a result.

7. It is transparent about its method and its limits

Run from anyone who promises "first place in ChatGPT" or a citation percentage by a fixed date. Answer surfaces revise their rules regularly; no one steers those algorithms. An honest agency explains its method, shows what it controls and what it does not, and talks about probabilities, not guarantees.

8. It reports on the right metrics

The click is no longer the sole unit of value. A GEO agency tracks the citation rate on your business queries, brand mentions in AI answers and your share of citation against competitors, on top of classic SEO metrics. If the reporting only talks about positions and traffic, it ignores all the GEO work.

Real GEO agency vs repainted SEO shop

The difference reads on a few lines: what the agency measures, what it produces, how it sources, what it reports. A real GEO agency measures citability and produces citable passages, then tracks AI citations; a repainted SEO shop keeps its positioning and traffic reflexes.

This table is not a judgement on SEO, which remains the indispensable foundation. It is a test to spot the agency that has genuinely changed its method versus the one that has only changed its pitch. Ask the questions in the next section and the right-hand column reveals itself fast.

The questions to ask before you sign

Four questions are enough to reveal a GEO agency's real level: how do you measure my citability today? What does a piece of content you produce look like? What metrics will you report to me? And what happens if results are slow? Concrete answers reassure you; evasive answers tell you just as much.

During the sales conversation, do not ask "do you do GEO?": everyone will say yes. Instead, ask questions that force the method into the open:

• "How do you measure my visibility in ChatGPT and AI Overviews today?" A real agency describes a panel of queries and a citation count. A repainted shop slides toward Google positions.
• "Show me a piece of content you have produced." Look for direct answers opening each section and named sources. A wall of text with no structure is a negative signal.
• "What metrics will appear in the reporting?" AI citations and brand mentions must show up, not just traffic.
• "What do you guarantee, and what do you not guarantee?" A nuanced answer is reassuring; a guarantee of first place is a red flag.
• "At what cadence do you produce, and do you hold that pace over time?" Consistency over the long run counts more than an initial spike.

The traps that should alert you

Three recurring traps: a quantified result guaranteed by a fixed date, content produced in bulk with no sources or review, and a package advertised without a prior diagnosis. None is compatible with serious GEO work; each signals an agency selling a promise rather than a method.

First trap, the quantified guarantee. "We guarantee X citations" or "first position in three months" is a technical nonsense: AI engines and Google adjust their rules continuously, you maximise odds, you do not steer the algorithm. A guarantee of that kind betrays either ignorance or bad faith.

Second trap, mass content with no substance. Producing a lot is pointless if the content is hollow: models favour sourced, quantified text and ignore the rest. An agency that bets on volume at the expense of quality manufactures invisible, even penalised, content. In passing, publishing personal data or sensitive claims without care also exposes you to compliance risk, a subject France's CNIL documents for the use of AI.

Third trap, the package with no diagnosis. A price announced before your starting point and the real work have been measured means nothing. The right order is the reverse: an audit that first quantifies the gap to close. The setup comes next, with its rate calibrated to your real situation, discussed in a conversation. That is why, with us, the price is set after a first meeting, never advertised blind.

Where Cicero Studio sits on this grid

Cicero Studio ticks all eight criteria by construction: a quantified GEO audit as the opening deliverable, editorial production in a citable format, automated semantic internal linking, systematically named sources, a sustained cadence, reporting on AI citations. Our principle: agency-quality work, software-grade productivity.

I will not pretend to be neutral: I founded Cicero Studio precisely because most so-called GEO services missed several lines of this grid. Our method comes down to three bricks that chain together in a single flow: a GEO audit that measures your current citability and quantifies the gap to close; an editorial production that creates the missing content in the right format, direct answer, proof, named source; and an automated semantic internal linking that organises the whole into topic clusters to signal your authority.

What sets us apart comes down to one line: agency-quality work, software-grade productivity. The editorial rigour of a human team, at the cadence that controlled automation allows. We document our approach in the open, because it is our best proof: our audits as well as our guides and comparisons are freely available, and every piece of content we publish respects the grid we have just described. The best way to judge us is not to take our word for it, it is to apply these eight criteria to us as to anyone else. To see who is positioning on this market and how, we keep a comparison of GEO agencies in France up to date.

Alexis Dollé

CEO & Founder of Cicero Studio

A growth and SEO content strategy specialist, I launched Cicero to help businesses capture durable organic visibility, on Google as in AI answers. Every piece of content we produce is built to convert, not just to exist.

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What this comparison does not settle

For the sake of honesty, and because it is the kind of transparency readers and AIs alike reward, here are the limits of this grid.

Going further

We document our approach in the open, because it is our best proof. Across the audits I run, we checked dozens of times that the brands cited by AIs were almost always the ones publishing clear, sourced content; in our experience it is not a theory, it is what we found query after query. Here are the most useful resources to dig deeper and take action: