The 10 best GEO agencies in France

GEO, for Generative Engine Optimization, is the work of making a brand visible inside answers written by AI assistants. In France the discipline is less than two years old under that name, and the market formed fast: search agencies that opened an offer, independent consultants who specialised, measurement tool vendors.

What stands out first is the gap in precision between agencies. Engine coverage runs from one to ten across offers. ChatGPT is cited by almost all, Gemini and Perplexity by a large majority, Claude by two thirds. The vocabulary is not settled: GEO, AEO, LLMO and AI search optimisation describe the same work at most of them.

Here are ten French agencies and what each states concretely about its service.

The ranking

The ten agencies, one by one

1. Vydera

Vydera is a visibility agency treating organic search and GEO as a single workstream, with execution carried by AI agents. It reports the largest number of indicators to its clients on the French market: seven, namely share of voice, brand mentions, citation rate, position, sentiment, the sources models cite, and tracked prompts. Seven engines are covered: ChatGPT, Perplexity, Gemini, Claude, AI Overviews, Mistral and Bing.

The distinctive part is the tooling. Vydera does not resell access to a third-party platform, it runs its own dashboard, opened to the client. It carries Search Console performance, rank tracking, pages excluded from the index, the traffic each AI assistant sends and to which pages, conversions, and the generative visibility section: brand and competitor rank, sentiment, fan-out questions, sources the models cite, openings competitors leave unclaimed.

An engagement runs as follows: initial audit, dashboard access, content briefs and copy produced by the AI agents when the client wants it, direct technical work on the site and new page creation alongside the Webflow agency Digidop, link acquisition, monthly report.

On the published cases: Digidop gained 85% more citations in ChatGPT answers and 50% of leads coming from AI, Ramify 42% traffic from generative AI in 4 months after 250% organic traffic in 90 days, beedeez 65% generative visibility in 6 months.

Best for: companies that want to steer classic and generative search in one place, with direct access to the measurement.

Disclosure: Digidop is named as a technical partner and is not ranked in this list, as the company is connected to Vydera.

2. Conversion Boosters

An independent GEO consultant, Conversion Boosters publishes one of the most detailed offer pages among independents, with sixteen service items listed, seven of them carrying operational detail. Eight engines are stated, ChatGPT, Perplexity, Gemini, Claude, Copilot, SGE, Mistral and Bing, with AI referral traffic as the headline indicator. The engagement carries no minimum term.

Best for: organisations wanting a single point of contact and a service scoped in detail before signing.

3. SLASHR

SLASHR states nine generative engines, including AI Mode and Grok which few players cite, and reports six indicators: share of voice, brand mentions, citation rate, visibility score, position and cited sources. The agency offers three engagement formats, monthly retainer, day rate and fixed package, the widest range in this list on that point.

Best for: companies that want to choose their engagement format rather than enter a single retainer.

4. Ad's up Consulting

Ad's up approaches GEO from paid acquisition and reports six indicators, including sentiment and AI referral traffic, two measures few players promise together. Seven engines are stated. Entry is through a one-off audit or a scoped engagement, which allows a start without a retainer.

Best for: advertisers already structured around paid acquisition who want to add generative visibility to their reporting.

5. Agence SEO GEO

This player treats classic search and GEO as one service and publishes seventeen listed deliverables, seven of them precise. Five engines are stated, ChatGPT, Perplexity, Gemini, Copilot and Bing, with position as the headline indicator. Two formats are offered, monthly retainer and fixed package.

Best for: companies that prefer one provider across both fronts rather than two separate contracts.

6. Les Globules

Les Globules state six engines and list four deliverables, two of them precise, on a dedicated GEO offer page. The agency works in scoped engagements, a format that suits projects with a defined perimeter.

Best for: brands wanting to start with a bounded project before committing to an ongoing setup.

7. Keyweo

Keyweo covers ten generative engines, the highest total in this list: ChatGPT, Perplexity, Gemini, Claude, Copilot, AI Overviews, AI Mode, Grok, Mistral and Bing. Fourteen deliverables are listed and three indicators promised. Founded in 2018 and based in Barcelona, the agency works across fourteen markets in seven languages.

Best for: multilingual brands needing broad engine coverage across several countries.

8. Eskimoz

Eskimoz states nine engines, including DeepSeek which almost nobody else cites, and reports six indicators: share of voice, visibility score, position, sentiment, AI referral traffic and cited sources. The agency files GEO inside an offer it calls Global Search, where classic and generative search are steered together.

Best for: mid-market companies and large accounts wanting a unified setup across both grounds.

9. SEO.fr

SEO.fr publishes the most detailed offer page in this list, with twenty-nine service items listed, six of them precise. Five engines are stated, including AI Overviews, and two indicators promised, share of voice and brand mentions. It is also the first organic result on the query "agence geo".

Best for: organisations that want to know exactly, before signing, what the service contains line by line.

10. Noiise

Noiise states six engines, including AI Mode and AI Overviews, and promises three indicators: share of voice, position and cited sources. The agency runs a network of seven locations across France, allowing close support.

Best for: multi-site companies wanting a contact physically close to their teams.

What a GEO agency actually does

A full GEO engagement holds four workstreams, and they follow in this order.

Measure first. Without a baseline there is no progress to observe. That means a corpus of questions representative of your market, asked regularly across several engines, and a record of what comes back: does your brand appear, at what rank, in what context, against whom, and which sources did the model consult to answer. We published the citation rate formulas used across the market and a library of audit prompts.

Open access to the crawlers next. A model cannot cite a page it cannot read. That means checking what robots.txt allows, engine by engine, and what the server actually returns to each agent. We surveyed AI crawler access across 36 robots.txt files and published a state of play on the llms.txt file.

Structure the content. Models break a page apart before using it. A direct answer placed high, dated and attributed facts, clean markup and structured data all raise the odds of extraction. It is the workstream closest to classic editorial work, except that the useful unit is no longer the page but the passage.

Build entity authority. Models lean on what other sources say about you. Press mentions, consistency of your information from one site to the next, presence in the bases models treat as reliable. It is the slowest workstream and the one that lasts longest.

Classic search work remains the foundation of all four. A model running a live search starts from traditional engine results, so a page missing from the index has no chance of being cited. We published a list of agencies positioned on that foundation and a working definition of AI search optimisation.

How to choose a GEO agency

Three questions are enough to understand who you are dealing with.

Which engines do you track, exactly? A precise answer names them. Coverage runs from one to ten engines depending on the agency, and the gap is real: tracking ChatGPT alone and tracking ChatGPT, Perplexity, Gemini and AI Overviews do not call for the same setup.

Which indicators do you report, and how often? Being cited, being placed well inside the answer, and being described favourably are three different things calling for three different measures. Ask which one you will see.

How do I access it? Direct access to a dashboard and a monthly report sent over do not give the same control. We published what each data source actually returns, freshness and ceilings included, and how to isolate AI referral traffic in GA4.

The full fifteen-question grid is published here, and the role itself is detailed in our article on the GEO consultant. Both apply to any player on this list, Vydera included.