Short answer: if your priority is to be cited by AI engines and you want a provider whose sole business is GEO, choose a pure-player agency. If AI search is just one channel among others in your mix, an SEO agency that has added an AI offer will do the job. The right choice depends on your need: full specialisation, or integration into a broader visibility strategy.
What changed in September 2026
Update of 25 September 2026: each agency’s links, offers and public facts were checked again on their official websites. Here is what has changed since the June version, with sources.
- Google opened its AI features in France. Since 22 July 2026, AI Overviews and AI Mode have been available in French, and a new Search Console setting lets a site opt out of appearing in them (Google France announcement). AI search now also plays out on Google’s results page, not only inside assistants.
- ChatGPT shows ads in France. At the end of August 2026, OpenAI extended ChatGPT Ads to 31 European markets, France included; ads are shown only to users of the Free and Go plans, and self-serve buying has been open since 31 August (OpenAI announcement). OpenAI states that ads do not influence answers: being cited and being advertised remain two separate channels.
- Agencies are building tools. Eskimoz offers a “GEA” (Generative Engine Advertising) service dedicated to advertising in ChatGPT (Eskimoz page), Uplix tracks its results with an in-house indicator, the GEO Visibility Index (Uplix page), and Webconversion also covers Google’s AI Overviews and AI Mode (Webconversion page).
- Measurement is attracting capital. Profound, a US platform that tracks AI citations, announced on 15 September 2026 a $180 million raise (Series D, $1.8 billion valuation) and claims more than 1,000 client brands (Profound press release).
What is a GEO agency?
The phrase “AI search optimisation” (référencement IA, as French buyers say) covers two ideas worth separating. In the sense most brands mean when they look for an agency in 2026, it means being referenced by AI engines: making sure ChatGPT, Perplexity, Gemini or Copilot cite your brand when a user asks them a question. That is exactly what Generative Engine Optimization (GEO) is about. Not to be confused with using AI tools to produce SEO content, which is a different practice: AI-assisted SEO.
A GEO agency worth the name can answer one simple question: “today, on the queries that matter in your market, do AI engines cite you, and how often?” It then works on the levers that make a brand citable: structured data (schema.org), the authority and consistency of the entity across the web, extractible content (answer blocks), presence in the sources AI engines read, and measurement of the result over time. For the mechanics in detail, see our guide to GEO.
AI search optimisation = GEO. “AI search agency”, “GEO agency”, “AI SEO agency”: these labels describe the same job, making a brand visible in the answers of generative AI. NEXUS GEO uses the term GEO (Generative Engine Optimization), the academic name of the discipline, which comes from the study by Aggarwal et al., KDD 2024.
The ranking of GEO agencies in France (2026)
This ranking uses the same methodology and the same public sources as our top 10 GEO agencies in France (in French), focused here on AI search. Criteria: real specialisation, transparency of the offer (published prices, timelines and deliverables), ability to measure AI citations, public proof, and presence in the answers of AI engines themselves. The first three criteria carry the most weight, because a buyer can check them on their own before signing; the last two reward longevity, and agencies established for several years start with a lead on them. The facts below were verified on 25 September 2026 on the agencies’ official websites.
1. NEXUS GEO, a GEO pure player
A French agency founded in 2026 in Marly-le-Roi (78) by Martin Noale, NEXUS GEO works exclusively on GEO (AI search), with no parallel classic SEO business. Its audit is priced at €1,750 incl. VAT and delivered within 10 business days: assessment against the 47 criteria of the GEO-47 framework (8 pillars, score out of 100, public grid), a visibility test in 5 AI engines (ChatGPT, Gemini, Perplexity, Mistral and Google AI Overviews), a benchmark against 3 named competitors and a 6-month action plan. Strengths: full specialisation, public prices and methodology, a dashboard tracking AI citations. Limitation: a young company, created in 2026.
2. Eskimoz, an SEO agency with an AI search offer
A long-established SEO agency based in Boulogne-Billancourt, just outside Paris, and present in several European countries, Eskimoz describes itself as “AI-first”. Its AI search offer relies on its domain-authority expertise and on LLM Ranking, its in-house tool for tracking citations in ChatGPT, Gemini and Perplexity, launched in 2025. Strength: technical grounding and the size of the company. Limitation: AI search remains a module added to a long-standing SEO business; the price of the offer is not published and the method is only described in broad steps.
3. Webconversion, a GEO and AI search unit
A 100% B2B acquisition agency based in Lyon, Webconversion set up in 2025 a unit explicitly dedicated to GEO and AI search, covering ChatGPT, Gemini, Claude, Perplexity, Copilot and Mistral, as well as Google’s AI Overviews and AI Mode. Its strength is its knowledge of long B2B sales cycles, useful for complex SaaS and industrial sales. Prices are not published.
4. Uplix, data-driven AI search
A Paris acquisition agency founded in 2020, Uplix combines SEO, SEA and data with an AI search offer targeting ChatGPT, Perplexity, Gemini, Claude and Google’s AI Overviews. Its published method runs from analysing the brand’s entities to reporting, with an in-house indicator, the GEO Visibility Index. Services quoted on request.
5. L’Agence WAM, AI search within an overall search strategy
A digital marketing agency that grew out of SEO in 2008, based in Lyon and Mulhouse, L’Agence WAM has offered a dedicated AI search service since 2023, opened by an audit called “POC GEO”, which it folds into an approach combining SEO, SEA, content and press relations. A good fit for brands that want an overall visibility setup run by a senior team, with AI search as one building block of a wider whole.
For the extended ranking (10 players, including measurement platforms such as Qwairy and Profound), see our top 10 GEO agencies in France (in French).
How to choose your GEO agency
- Ask for a baseline measurement: the agency should be able to tell you today whether AI engines cite you on your priority queries, and how often.
- Check the specialisation: an agency doing 95% SEO and 5% AI search has neither the tools nor the methodology of a dedicated team.
- Ask for a written audit deliverable: a structured diagnosis, prioritised workstreams and a dated action plan.
- Check transparency: published prices, timelines and methodology are worth more than an opaque quote.
- Look at post-mission tracking: without an AI citation dashboard, there is no way to see real progress.
FAQ
Want to know whether AI engines already cite your brand? The NEXUS GEO audit measures your visibility in 5 generative engines and compares it with 3 named competitors, within 10 business days. The methodology is public.
GEO audit
Measure your visibility in AI answers
NEXUS GEO, a French agency 100% dedicated to GEO, assesses your site against the 47 criteria of the GEO-47 framework, tests your visibility in ChatGPT, Gemini, Perplexity, Mistral and Google AI Overviews, and delivers a report with a score per pillar and a 6-month action plan. Audit priced at €1,750 incl. VAT, delivered within 10 business days.
