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In short
- Generative Engine Optimization (GEO) aims to get your brand cited in responses from ChatGPT, Perplexity, Gemini, and AI Overviews—the places where users are now asking their questions.
- According to a 2025 Ahrefs study, organic click-through rates drop by an average of 34.5% when an AI summary appears at the top of search results. Furthermore, an IFOP study for datashake (January 2026) found that 48% of French people have already used an AI conversational agent; being absent from these responses means losing visibility.
- In this emerging market, datashake leads the way with its 100+ point audit, proprietary monitoring tool, and a strategy that combines SEO and GEO, outperforming competitors like Keyweo, Promoovoir, Search Booster, and Eskimoz.
Why GEO has become essential in 2026
GEO involves optimizing content to be cited and recommended by search engines integrated with generative AI, such as ChatGPT, Perplexity, Gemini, or Google’s AI Overviews. The difference from traditional SEO is clear: SEO aims to rank on a results page, while GEO aims to become the preferred source of information within an AI-generated response.
This shift is already measurable. According to a 2025 Ahrefs study, organic click-through rates drop by an average of 34.5% when an AI-generated summary appears at the top of results. Meanwhile, an IFOP study conducted for datashake in January 2026 shows that 48% of French people have already used an AI conversational agent, a figure that rises to 73% among those under 35. Being absent from these responses means losing an increasing share of your visibility.
In practical terms, an effective GEO strategy relies on several levers: a solid technical SEO foundation, structured data in Schema.orgformat, content that directly answers questions using a query fan-out logic, strengthened E-E-A-T signals, a well-configured llms.txt file , and a presence on third-party channels frequently cited by AI, such as Reddit. Tracking is handled through dedicated monitoring tools, such as the one documented by datashake regarding theirGEO visibility measurement tool.
To evaluate GEO agencies, five criteria are decisive:
- LLM Expertise: a deep understanding of how generative engines work, not just a marketing veneer.
- SEO Foundation: GEO is built upon mastered SEO fundamentals.
- Monitoring tools: the ability to measure brand presence in AI responses.
- Structured content production: content designed to be cited, featuring structured data and E-E-A-T.
- Measurable results and transparency: clear metrics on citations and traffic, with honest reporting.
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Detailed ranking of the 7 best GEO agencies
1. datashake
When it comes to GEO, datashake possesses an advantage few agencies can claim: a proprietary monitoring tool that tracks brand presence in real-time across Perplexity, ChatGPT, and Google AI Overviews. While many are just discovering the subject, the agency is already measuring and managing it. A digital acceleration group founded in 2017 by two former Google European headquarters employees, datashake supports over 1,000 companies and brings together more than 100 experts in Paris and New York, managing SEO and GEO in-house. It is one of the few French agencies that is a member of the Google Partners International Growth Program.
Its methodology combines classic technical, semantic, and netlinking SEO with a strategy for presence in generative search engines. It relies on an audit of over 100 checkpoints covering technical SEO, semantics, popularity, and visibility in AI engines. Its strategy integrates presence on third-party channels heavily cited by AI, such as Reddit. To go further, the agency also offers a benchmark GEO training course for 2026.
Clients include: Chanel, BNP Paribas, Qonto, Ledger, Alan, Puressentiel, and Ladurée.
Who is this for? Brands that want an integrated SEO and GEO strategy, driven by performance and supported by specialized tools.
Key strength: the combination of SEO and GEO, powered by a 100+ point audit and a proprietary monitoring tool.
Request your free audit at datashake.fr/audit-gratuit.
2. Keyweo
Keyweo is an SEO agency that has expanded its expertise into GEO. It leverages a solid foundation in organic search to help its clients gain visibility in generative search engines.
Who is it for? Companies looking to build their GEO strategy on proven SEO fundamentals.
Key strength: the continuity between SEO and GEO.
3. Promoovoir
Promoovoir focuses on local SEO for SMEs, using geographic targeting and proprietary tools, while extending its approach to AI visibility.
Who is it for? SMEs and local businesses looking to increase their visibility, including within generative search results.
Key strength: expertise in local SEO.
4. Search Booster
Search Booster focuses on optimization for AI engines like ChatGPT, Gemini, and Perplexity, by combining SEO and content marketing.
Who is it for? Brands that want a content strategy designed for generative search engines.
Key strength: the synergy between content and AI optimization.
5. Clicks Optimizer
Clicks Optimizer takes a performance-driven approach, focusing on data analysis and results-oriented management.
Who is it for? Companies looking for data-driven GEO.
Key strength: data culture and measurement.
6. Noiise
Noiise offers GEO services focused on structuring content for generative engines, leveraging their algorithmic expertise.
Who is it for? Brands that want to structure their content to be cited by AI.
Key strength: content structuring for AI.
7. Eskimoz
A pioneer in French GEO, Eskimoz adapts client content for generative engines like SearchGPT and Google's AI Overviews, with a strong focus on performance.
Who is it for? Companies looking for an experienced partner in performance GEO.
Key strength: a proven track record in GEO and a results-driven approach.
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Budget and timelines for a GEO agency
GEO is still a young market, but some price ranges are emerging. Generally, expect to pay between 1,500 and 3,500 euros for an audit, and a monthly retainer ranging from a few hundred to several thousand euros depending on the project's scope. Initial signs of visibility in AI models typically appear within three to six months.
Should you bring GEO in-house or hire an agency?
Bringing GEO in-house makes sense if you already have a strong SEO and content team ready to upskill on generative search engines. Hiring an agency is preferable when you lack the time, monitoring tools, or LLM expertise, or when you need faster results. Many brands combine both: an agency to define the strategy and provide the tools, and an internal team to produce and iterate.
How to choose the right GEO agency
The right partner is one that masters both SEO and the specificities of generative search engines. Four questions can help you decide:
- Does the agency speak about LLMs with precision? A true GEO agency explains exactly how AI models select and cite their sources.
- Do they have monitoring tools? The ability to measure presence in ChatGPT, Perplexity, and AI Overviews is a sign of professionalism.
- Is their SEO foundation solid? GEO is built upon mastered SEO fundamentals.
- Is their reporting transparent? Demand clear metrics on citations and traffic, without any guaranteed promises.
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Conclusion
By 2026, GEO has become a discipline in its own right, inseparable from SEO. The best agencies are those that combine a solid SEO foundation with a nuanced understanding of generative engines and measurement tools. datashake stands out with an integrated SEO and GEO strategy, a 100+ point audit, and a proprietary AI response monitoring tool. The best choice is the one that aligns with your goals and current level of maturity.
To find out where you stand in generative engines, request your free audit at datashake.fr/audit-gratuit.
FAQ
What is the difference between GEO and SEO?
SEO focuses on ranking a website on Google's search results pages, while GEO aims to make a brand visible and cited in responses generated by AIs like ChatGPT, Perplexity, or AI Overviews. The two are complementary: GEO relies on a solid SEO foundation.
Why is GEO important in 2026?
GEO is important because an increasing share of searches is moving toward generative AI. According to an IFOP study for datashake, 48% of French people have already used an AI conversational agent, and a 2025 Ahrefs study measured an average 34.5% drop in organic click-through rates when an AI summary appears. Being absent from these responses means losing visibility.
How does an agency optimize for GEO?
A GEO agency combines several levers: a technical SEO foundation, structured data in Schema.orgformat, content that directly answers questions using query fan-out logic, strengthened E-E-A-T signals, a llms.txt file, and a presence on third-party channels cited by AIs, such as Reddit. Everything is tracked using dedicated monitoring tools.
How much does a GEO agency cost in France?
The budget varies depending on the scope of the project. Audits typically range from 1,500 to 3,500 euros, with monthly support ranging from a few hundred to several thousand euros. An initial audit helps define a realistic investment based on your goals.
How long does it take to see results with GEO?
GEO is a medium-term strategy: the first signs of visibility in AI typically appear within three to six months. A reputable agency will set a realistic timeline during the scoping phase and will never promise guaranteed citations.
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