Become the brand AI engines recommend.
NEXUS GEO is a French agency 100% dedicated to Generative Engine Optimization. We help brands get cited in AI answers, with a public methodology, a score out of 100 and citation tracking in ChatGPT, Gemini, Perplexity, Mistral and Google AI Overviews.
What is Generative Engine Optimization?
Generative Engine Optimization (GEO) is the discipline of making a brand citable inside the answers produced by generative AI engines. Where SEO earns you a slot in Google’s blue links, GEO earns you a place inside the sentence an AI generates to answer your prospect. It’s a structurally different game, and a new acquisition channel that is growing faster than classic search.
AI-referred traffic jumped +527% over the first five months of 2025 compared with the same period of 2024 (Search Engine Land, 2025), and a visitor arriving from an AI converts on average 4.4× better than a Google visitor (Semrush, 2025). Gartner predicts a 25% drop in search engine volume by 2026, driven by AI chatbots and virtual agents.
In plain terms: when a B2B buyer asks ChatGPT "what’s the best solution X in Europe?", you want your brand to be named, and ideally cited first. That’s the work NEXUS GEO does.
Why work with NEXUS GEO
- 100% GEO specialisation. Not a bolt-on to a classic SEO offer. We work on nothing else.
- A written, measurable methodology. Three stages: AI Audit, Content Engineering, AI Pre-selection, with a score out of 100 based on the 47 criteria of the public GEO-47 framework and a citation tracking dashboard.
- Published prices, one written commitment. €1,750 incl. VAT for the audit, delivered within 10 business days, up to €12,500 for the 6-month Premium plan, as a one-off payment. We guarantee no result in AI answers. Our only commitment: after the audit, we may set a target GEO score for your site in writing (for example, audited at 20/100, target 65/100 minimum). If the target is not reached by the end of the support mission, we keep working free of charge until it is.
- Bilingual delivery. Engagements run in English and French. We measure citations in 5 AI engines: ChatGPT, Gemini, Perplexity, Mistral and Google AI Overviews.
- References. Clients include Kickers and Umbro.
How a NEXUS GEO engagement runs
- AI Audit (within 10 business days). We score your site on the 47 criteria of the public GEO-47 framework, a grid valid for all AIs (ChatGPT, Gemini, Perplexity, Claude, Mistral, Copilot and Google AI Overviews), and test your visibility in 5 AI engines (ChatGPT, Gemini, Perplexity, Mistral and Google AI Overviews). Output: a score out of 100, a benchmark against 3 named competitors, a 30-page PDF report, a 6-month action plan and a 60-minute debrief.
- Content engineering. We write the extractible blocks AI engines can quote: definitions, FAQs, dated figures, comparison tables and structured Schema.org markup, designed to support your classic SEO rather than degrade it.
- AI pre-selection. Technical rollout of what makes your site readable and citable by AI engines, plus regular tracking. Your dashboard shows your citation rate, average position and share of voice in ChatGPT, Gemini, Perplexity, Mistral and Google AI Overviews. Missions usually last 3 to 6 months or more, depending on the client.
Featured English resources
Five of our pillar pieces, adapted for international readers. Long-form guides that cover GEO from definitions to measurement.
Fundamentals
What is GEO? The complete 2026 guide for modern brands
Your customers don’t type into Google anymore: they ask an AI. Understand GEO in 6 minutes, and why you need to act on it today.
3 min · Read
Comparisons
Top 5 GEO agencies in France in 2026: the ranking
AI search optimisation means getting cited by ChatGPT, Perplexity, Gemini and the other generative engines. How to choose a specialist agency, and our 2026 ranking.
8 min · Read
Fundamentals
GEO vs SEO: what’s different in 2026? (complete comparison)
You’ve been optimising for Google for years. Now AIs answer instead of Google. Understand the differences between GEO and SEO in 10 minutes.
4 min · Read
Guides
How to appear in ChatGPT: the B2B guide (2026)
Your prospects ask ChatGPT "what’s the best solution X?" and you want to be named. How ChatGPT picks its sources, what makes a brand citable, and how to track your citations.
9 min · Read
Measurement
Measuring AI citations in 2026: tools, methods, DIY
You can’t steer what you don’t measure. Comparison of 2026 tools for tracking AI citations (free, paid, DIY) and the principles of reliable monthly measurement.
8 min · Read
Frequently asked questions
Do you work with non-French clients?
Yes. Engagements can run in English or French. Citations are measured in 5 AI engines: ChatGPT, Gemini, Perplexity, Mistral and Google AI Overviews.
How long does it take to see results?
No timeframe can be guaranteed: it depends on your starting visibility, your competitors and the engines involved. Support missions usually last 3 to 6 months or more, depending on the client, with citations measured regularly on the same questions to track progress.
How much does it cost?
One-off payment, VAT included: €1,750 for the audit (47 criteria, 30-page PDF report, 6-month action plan, 60-minute debrief, delivered within 10 business days), €2,500 for the Base plan (3 months), €3,500 for the Advanced plan (3 months) and €12,500 for the Premium plan (6 months). No result in AI answers is guaranteed; our only commitment is the written target GEO score described above.
Can you pay AI engines to be cited?
No. Ads exist on some of these surfaces (ChatGPT has shown ads in France since late August 2026), but OpenAI states that ads do not influence answers: being cited and being advertised remain two separate channels. Citations are earned through authority signals, technical citability and editorial quality. That’s the GEO work.
What’s the typical client profile?
Any B2B brand with a long sales cycle and an average deal value above €5,000. In B2C, GEO becomes relevant for considered purchases, premium fashion, professional services, education, real estate.
Curious where your brand stands?
The NEXUS GEO audit scores your site on the 47 criteria of the GEO-47 framework, measures your citations in ChatGPT, Gemini, Perplexity, Mistral and Google AI Overviews, benchmarks you against 3 named competitors and delivers a 6-month action plan within 10 business days, for €1,750 incl. VAT. We guarantee no result in AI answers: after the audit, we may commit in writing to a target GEO score, and if a support mission ends below it, we keep working free of charge until it is reached.