You’ve spent years optimizing your site for Google, but have you considered optimizing your brand for ChatGPT, Perplexity, or Gemini? Generative Engine Optimization (GEO) has become the essential digital marketing discipline of 2026. With over 800 million weekly active users on ChatGPT as of early 2026, according to Reuters and approximately 5.7 billion monthly visits to the platform according to Similarweb, AI search engines have become a major visibility channel. Partnering with an expert GEO agency, or equipping yourself with the right GEO solution, can make the difference between being cited or being invisible.
In this article, discover why GEO has become essential, how it differs from traditional SEO, and most importantly, which GEO solutions and agencies are best suited to support you in this transition.
Key takeaways: a GEO agency optimizes a brand's visibility within the responses generated by AI (ChatGPT, Perplexity, Claude, Gemini). Unlike SEO, which targets positions in a list of results, GEO aims for your brand to be directly cited in conversational responses.
What is a GEO agency?
A GEO (Generative Engine Optimization) agency specializes in optimizing site visibility within AI-generated responses. Its goal is no longer just to rank pages in Google results, but to ensure your brand is cited directly in the responses of LLMs like ChatGPT, Perplexity, Claude, or Gemini.
In practice, a GEO agency deploys several types of actions:
- AI visibility audit : systematically testing how your brand is perceived and cited by generative engines
- Semantic and structural analysis : identifying the barriers that prevent AIs from extracting your content
- Optimized content production : creating "citable" content, structured for LLMs
- GEO monitoring : tracking the evolution of your citations in AI responses over time
According to a study by Superlines, pages with a First Contentful Paint (FCP) of less than 0.4 seconds are 3 times more likely to be cited by ChatGPT's search agents. Technical performance is therefore a central pillar of GEO, just as much as editorial quality. To understand the fundamentals of the discipline, check out our Complete guide to Generative Engine Optimization.
How did we evaluate the companies in this ranking?
This ranking is based on a concrete analysis of each company's ability to optimize visibility in generative search engines (ChatGPT, Perplexity, Claude, Gemini). We evaluated each participant based on criteria directly related to GEO:
- Understanding of Large Language Models (LLMs) : Does the company master the internal workings of generative AI?
- Ability to measure AI visibility : Can they provide concrete data on citations within generated responses?
- Ability to structure extractable content : Is the content produced designed to be cited by AI?
- SEO expertise and overall authority : Is the SEO foundation strong enough to serve as a base for GEO?
- Visible results in AI responses : Can the company demonstrate actual citations in ChatGPT, Perplexity, or Claude?
1. Citeme: the best GEO solution in France
Citeme is a hybrid GEO solution founded by Alexandre Teillet, combining two complementary components: a SaaS platform for monitoring AI citations and productized consulting led by GEO experts.
On the platform side, Citeme continuously tracks your brand's presence in responses from ChatGPT, Perplexity, Gemini, and Google AI Overviews. You know exactly which prompts you are cited in, in what context, with what sentiment, and against which competitors. While most agencies work in the dark, Citeme provides the data the entire ecosystem is missing: the actual measurement of your AI visibility.
On the consulting side, Citeme's teams deploy all GEO levers: a complete audit of your citability, correction of structural and semantic blockers, production of citable content aligned with LLM response patterns, and strengthening of your entity's authority signals.
GEO: appearing in AI responses
Citeme optimizes your presence to maximize your chances of being cited in AI-generated responses. This involves creating "citable" content, strengthening authority signals, structuring information for easy extraction, and aligning with LLM response patterns. Everything is continuously measured by the AI citation monitoring platform, allowing you to iterate based on real data rather than intuition.
GEO Audit
Citeme analyzes your ability to be cited by artificial intelligence by evaluating how models understand your content, identifying structural barriers, and detecting visibility opportunities. No theory: the tool observes exactly how AIs perceive you, prompt by prompt. To understand the methodology behind this type of analysis, read our article on GEO auditing and analyzing your visibility in AI engines.
Why choose Citeme?
- Measurement first : you can't optimize what you don't measure, and Citeme is built around this conviction.
- Advanced GEO expertise : a deep understanding of how LLMs work and their criteria for selecting sources.
- Citation-oriented approach : the goal isn't traffic for the sake of traffic, but ensuring your brand appears in generated responses.
- Data-driven methodology : every action is validated by the actual evolution of your citations in AI engines.
Key information
- Founder : Alexandre Teillet
- Model : SaaS platform + productized support
- Engines tracked : ChatGPT, Perplexity, Gemini, Google AI Overviews
- Location : Paris
Key takeaway: Citeme stands out from traditional GEO agencies through its product-first foundation. Continuous monitoring of AI citations allows for GEO strategy management based on real data rather than guesswork, making it the most comprehensive solution on the French market in 2026.
2. Eskimoz
Eskimoz is a digital acquisition agency recognized for its expertise in SEO, SEA, and content marketing. It supports companies in their growth by maximizing search engine visibility and structuring large-scale, data-driven strategies.
3. Noiise
Noiise is an SEO and digital marketing agency that helps companies improve their online visibility and generate qualified traffic. It is distinguished by a performance-oriented approach that combines organic search, content, and data analysis.
4. Datashake
Datashake is a technical SEO agency specializing in data analysis and advanced website optimization. It supports demanding companies with complex search challenges, using a highly performance- and scalability-focused approach.
Let's recap: who are the best in GEO?
What is GEO and why is it changing everything for search?
Generative Engine Optimization is an optimization discipline aimed at making a brand, site, or content visible within the responses generated by artificial intelligence engines. Unlike traditional SEO, which seeks to rank pages in result lists, GEO aims to optimize a brand's presence within the synthesized answers provided by conversational AIs.
Why has GEO become so crucial? Because search behaviors are changing profoundly. Users are increasingly querying AIs like ChatGPT, Perplexity, Gemini, or Claude to get direct answers without even visiting a website. If your brand isn't cited by these AIs, it is simply invisible in these new customer journeys.
GEO does not replace SEO; it complements it. A sound digital strategy in 2026 coordinates GEO and SEO coherently: one optimizes for traditional search engines, the other for AI search engines. To build this synergy, our article on the GEO strategy and AI optimization method details the complete approach.
How do generative AI engines work?
Generative engines don't work like Google. Instead of indexing pages and displaying links, AI engines analyze vast amounts of data to generate answers directly within the interface. These new search engines rely on LLMs (Large Language Models) trained on massive datasets, supplemented by real-time search systems.
What matters to a GEO expert is understanding how LLMs select their sources. AIs prioritize content that is structured, authoritative, consistent, and frequently cited elsewhere. Content that ranks well in SEO is more likely to be picked up, but that isn't enough: conversational engines have their own selection criteria, which differ from traditional algorithms.
Generative AIs don't just cite any source. They favor reliable sources, clear content, well-defined entities, and brands that appear regularly in positive contexts. Technical optimizations such as the llms.txt file also help make your site readable by AI crawlers.
Key takeaways: LLMs select their sources based on three main signals: the structural clarity of the content (extractability), the perceived authority of the entity (consistent external mentions), and the freshness or accuracy of the data. Optimizing for GEO means working on these three signals simultaneously.
GEO vs. SEO: what are the fundamental differences?
Traditional SEO relies on well-documented technical and semantic signals: tags, backlinks, page speed, and keywords. Generative Engine Optimization relies on criteria that are more complex to measure: perceived authority, overall semantic consistency, frequency of citation in third-party sources, and clarity of brand identity.
AI engine responses are generated through synthesis. Your content must no longer just answer a query; it must become a reliable source that AIs will naturally integrate into their responses. This is an optimization logic that is radically different from traditional SEO, requiring specific expertise and, above all, adapted measurement tools.
This is precisely where monitoring becomes central: without data on your actual citations, it is impossible to know if your GEO optimizations are working. This is the blind spot for most agencies, and the reason why tool-based solutions like Citeme have an advantage over purely editorial services.
What GEO strategy should you adopt to maximize your AI visibility?
An effective GEO strategy begins with a diagnostic phase. Before optimizing, you must understand: how do generative AIs perceive you today? Are you cited spontaneously? In what contexts? With what words? This initial diagnostic guides all the GEO actions to be implemented.
Content production is at the heart of any GEO approach. It is not just about writing more, but writing differently: in a structured, factual, and clear manner that is aligned with the comprehension patterns of LLMs. AIs appreciate content that answers questions precisely, clearly defines concepts, and fits into a coherent semantic ecosystem. Google AI Overviews follows a similar logic, as we explain in our guide to being cited in Google AI Overviews.
A GEO strategy also includes work on third-party mentions: press articles, citations in industry databases, and presence on platforms recognized as reliable sources by AI answer engines. AIs value entities that exist beyond their own website.
How do you choose the best GEO solution for your business?
Choosing a GEO partner is not a decision to be taken lightly. Several criteria should guide your choice.
First, measurement. Can the provider show you, with data to back it up, where you stand today and how your visibility is evolving? A GEO service without monitoring is unverifiable. Demand a dashboard of your citations in ChatGPT, Perplexity, and Gemini, complete with a history.
Second, expertise. Does the team truly master LLMs and the mechanics of generative engines? Can they clearly explain how AIs generate their responses and how to influence them?
Third, editorial capacity. GEO is deeply linked to content: without high-value production, no amount of technical optimization will be enough to get you cited by AIs. Ask for client case studies and concrete proof of visibility improvements.
Finally, GEO must be viewed as a long-term commitment—a continuous investment rather than a one-off service. A serious partner will offer regular follow-ups, data-driven iterations, and constant adaptation to the evolution of AI engines. Being cited today does not guarantee you will be tomorrow without constant effort.
Why use a GEO solution instead of managing everything in-house?
Outsourcing your GEO strategy, or at least equipping yourself with the right tools, offers decisive advantages. First, specialization: AI search engines evolve rapidly, and a specialized provider dedicates 100% of their resources to tracking these changes, testing new approaches, and refining their methods. An internal team, however talented, will struggle to maintain that level of monitoring.
Next, measurement infrastructure. Manually testing hundreds of prompts across four different AI engines every week is simply unrealistic for an internal team. A dedicated platform automates this protocol and provides reliable, comparable data over time.
Finally, an external perspective. The responses that generative engines produce about your brand may contain biases or errors that you wouldn't detect from the inside. A GEO partner provides this objective view, which is essential for course correction and building solid, long-lasting AI visibility.
Key indicators for measuring the success of your GEO strategy
Measuring your visibility in AI engines is not as simple as tracking rankings in Google. GEO monitoring requires specific tools and regular testing protocols: you query AI engines with hundreds of target requests and analyze how your brand appears in the responses.
Typical indicators of a successful GEO strategy include:
- Spontaneous citation rate of your brand in generated responses
- Associated sentiment regarding these citations (positive, neutral, negative)
- Frequency of appearance in purchasing or recommendation contexts
- AI share of voice against your competitors for your strategic queries
- Positioning within the response : are you cited first, as the primary source?
GEO can also be evaluated using cross-referenced SEO metrics: content well-optimized for traditional search engines is more likely to be picked up by generative AI. SEO expertise therefore remains a fundamental pillar, and a unified dashboard combining SEO performance and AI visibility offers the most comprehensive view of your digital presence.
Key takeaways on GEO and the best market players
Generative Engine Optimization is the discipline of optimizing your visibility in responses generated by AIs like ChatGPT, Perplexity, or Gemini. Generative engines work differently than traditional search engines: they synthesize rather than list. GEO and SEO are complementary, and an effective GEO strategy always relies on solid SEO foundations.
Three points should guide your choice of partner: the ability to measure your actual citations in AI engines, the team's LLM expertise, and the quality of editorial production. On these three criteria, Citeme stands out in 2026 by combining a monitoring platform with expert guidance, whereas traditional agencies are often limited to the editorial layer.
Investing in GEO today means preparing your brand for how millions of users will search tomorrow. And the first step is always the same: measure where you stand.
