In short: In 2026, RESONEO comes out on top. It suits brands and e-retailers, including those operating internationally, that want a data-driven SEO and GEO strategy. CyberCité follows, for businesses looking for advanced SEO built into a comprehensive digital support package. Uplix completes the podium, for brands that want to combine data-driven SEO with Paid Media. The other seven agencies meet more specific needs: WordPress, B2B, international or visibility in AI.
- RESONEO: For brands and e-retailers, including those operating internationally, that want a data-driven SEO and GEO strategy.
- CyberCité: For businesses that want an advanced SEO strategy built into a comprehensive digital support package.
- Uplix: For brands that want a data-driven SEO strategy combined with Paid Media.
- datashake: For brands that want to manage their SEO alongside their other acquisition channels, in France and internationally.
- Astrak: For e-commerce, SaaS or service businesses that want to gain traffic on Google and in AI.
- SEO Monkey: For e-commerce sites, SaaS companies, marketplaces and service businesses that want to gain visibility on Google and in AI.
- SEOMix: For businesses from micro-companies to large groups whose site runs on WordPress and that want to gain visibility on Google.
- Webconversion: For B2B businesses that want to generate qualified leads through search visibility on Google and in AI.
- Keyweo: For businesses that want to gain visibility on Google and AI engines, in France and internationally.
- Empirik: For businesses that want data-driven SEO that is ready for the era of AI engines.
Updated on 31 October 2026.
Why has choosing an SEO agency become harder in 2026?
Google remains the gateway to the web in France. According to StatCounter, it held 88.69% of the search engine market in the country in May 2026. Ranking well on Google is therefore still a direct commercial issue, whatever your sector.
But a good ranking no longer guarantees the click. According to the SparkToro and Similarweb study carried out from January to April 2026, 65.3% of Google searches in France end without any click. The Pew Research Center also observed in 2025 that users click on a traditional link in 8% of visits when an AI summary is displayed, compared with 15% without a summary. SEO must therefore also target AI answers. This is what is known as GEO.
On the buyer side, the concerns are well known. Paying for months with no measurable results. Receiving reports full of rankings but with no link to revenue. Being tied into a long contract, or seeing your site penalised because of dubious practices. This ranking helps you avoid these pitfalls.
How did we choose these 10 agencies?
This ranking is based solely on what each company publishes itself (its website, its methodology and case study pages), read at the time of the update. Four criteria counted:
- Data-driven management: The agency sets measurable objectives and links its actions to traffic, leads and revenue.
- AI readiness: It works on your visibility in AI engine answers, not just in Google's traditional links.
- Technical and editorial expertise: It can audit and fix a site in depth, then produce useful content that ranks.
- Fit with your profile: Its experience matches your size, sector, CMS and markets, in France or internationally.
The 10 Best SEO Agencies in France (2026)
1. RESONEO
RESONEO is an independent agency specialising in search engines, data strategies and digital media performance. Its SEO covers technical, semantic, link building, mobile and local. It also supports visibility in LLMs with a GEO offering, as well as SEA, Display and Social Ads, and analytics. Its approach combines business vision, technical skills, media expertise and AI applied to Search, with its in-house tool platform MATRICEO and a team of more than 90 consultants.
Strengths:
- More than 90 expert consultants claimed
- In-house tool platform MATRICEO and R&D activity
- Testimonials from Generali, Ducray, Dassault Systèmes, Easyvoyage
Best for: Brands and e-retailers, including those operating internationally, that want a data-driven SEO and GEO strategy.
2. CyberCité
CyberCité is a digital marketing agency organised around six areas of expertise: SEO, GEO, SEA and Social Ads, Data Analytics, Content Marketing and Global Search. On the SEO side, its consultants carry out visibility analysis, technical CMS optimisation, semantic and off-page strategy, link building, log analysis, and local and international SEO. The agency also offers a GEO and LLM audit for visibility on AI engines. Its R&D team develops tools such as the SEO software DataGarden. It also trains its clients.
Strengths:
- Technical SEO, semantics, link building, logs, local and international
- GEO and LLM audit for AI engines
- SEO software DataGarden developed by its R&D team
Best for: Businesses that want an advanced SEO strategy built into a comprehensive digital support package.
3. Uplix
Uplix is an SEO agency that supports brands from bespoke strategy through to implementation. It offers consulting, audits, content writing, redesign and migration, link building, as well as GEO expertise for visibility in AI engines such as ChatGPT or Perplexity. Its approach unifies Search, Media and Data. Its in-house R&D unit develops proprietary AI-powered technologies to identify optimisation levers. The agency also works on SEA, SMA, tracking, dashboarding and CRO.
Strengths:
- Winner of the Grand Prix Cas d'Or Search & IA
- Proprietary AI technology from an in-house R&D unit
- Rated 5/5 from 51 Google reviews
Best for: Brands that want a data-driven SEO strategy combined with Paid Media.
4. datashake
datashake describes itself as a digital acceleration group. Its SEO/GEO offering optimises your visibility on search engines and LLMs, with technical, semantic and link-building work. The group brings together specialist entities (SEA, SMA, GEA, SEO, GEO, creative, data) that work in a coordinated way for a 360° strategy. AI is built into its processes to speed up execution. Its teams act as an extension of yours, with decisions aligned with your business objectives. Celio is among the SEO case studies cited.
Strengths:
- Traditional SEO and visibility on ChatGPT or Gemini
- More than 100 people and more than 1,000 advertisers supported
- Member of the Google Partners International Growth Program
Best for: Brands that want to manage their SEO alongside their other acquisition channels, in France and internationally.
5. Astrak
Astrak is an SEO and GEO agency that makes you visible on Google and cited by AI tools such as ChatGPT, Perplexity or Gemini. It combines technical SEO, content strategy, premium link building and GEO. It also covers local, international and programmatic SEO, redesigns and audits. A senior consultant manages your account from A to Z: strategy, production, monitoring. Its services start from €900, with no commitment, and ongoing GEO R&D.
Strengths:
- A single senior point of contact from strategy to monitoring
- Ongoing GEO R&D, results proven by AI answers
- Use cases measured on clients' real data
Best for: E-commerce, SaaS or service businesses that want to gain traffic on Google and in AI.
6. SEO Monkey
SEO Monkey is an SEO and GEO agency that makes your brand visible on Google and in the answers of AI tools such as ChatGPT. It covers international SEO, backlinks, site migrations, online reputation, Reddit and YouTube. Its Paid, Studio and Data units round out acquisition. The agency offers a free pre-audit, develops its own tools such as Crawlr and Trackr, and claims to have supported more than 400 businesses since 2020.
Strengths:
- SEO and GEO expertise for Google and AI
- In-house tools for audits, templates and tracking
- Free pre-audit and real-time project monitoring
Best for: E-commerce sites, SaaS companies, marketplaces and service businesses that want to gain visibility on Google and in AI.
7. SEOMix
SeoMix describes itself as the expert agency for SEO and the WordPress CMS, based in Nantes. It offers bespoke services covering audits, support, SEO redesigns, e-commerce SEO, WordPress site creation and maintenance, as well as SEO and GEO training. Its method follows four steps: audit the site and the market, fix WordPress technically, optimise content and structure, then continuously build authority. The agency has also developed SEOKEY, an SEO plugin for WordPress.
Strengths:
- Highly specialised in WordPress SEO since 2008
- Three books published and more than eighty talks given
- Clear four-step method, from audit to authority
Best for: Businesses from micro-companies to large groups whose site runs on WordPress and that want to gain visibility on Google.
8. Webconversion
Webconversion is a 100% B2B digital marketing agency based in Lyon, founded in 2017. It makes you visible on Google and in AI through SEO and GEO: technical and semantic audits, content strategy, link building, and tracking of your citations in ChatGPT, Gemini or Perplexity. It complements this visibility with Ads campaigns managed on cost per lead, inbound marketing, ABM and HubSpot integration. The goal remains the same: generating qualified leads.
Strengths:
- Dual SEO and GEO expertise for Google and AI engines
- 100% B2B agency focused on generating qualified leads
- HubSpot certified partner, lead tracking through to signature
Best for: B2B businesses that want to generate qualified leads through search visibility on Google and in AI.
Visit the Webconversion website
9. Keyweo
Keyweo is a digital marketing agency that supports brands' visibility in France and internationally. Its organic unit combines traditional SEO and Generative Engine Optimization (GEO). It offers keyword research, SEO consulting, local SEO, international SEO and SEO migration. It also measures your visibility on ChatGPT, Perplexity, Claude and Gemini, and works on your AI citation strategy. A Paid Ads unit completes the offering with Google Ads, Microsoft Ads and Social Ads. A free pre-audit is available.
Strengths:
- Traditional SEO and GEO for visibility on LLMs
- Case studies with figures, including Villanovo with +406% SEO traffic
- International SEO and a website available in six languages
Best for: Businesses that want to gain visibility on Google and AI engines, in France and internationally.
10. Empirik
Empirik is a digital marketing agency based in Paris and Lyon that turns your data into value. In SEO, it reconciles different data sources to define prioritised strategies and sustain strong performance over time. It handles SEO and GEO in synergy to strengthen your visibility in LLMs. Its method follows three steps: define, deploy, manage. It relies on its own in-house tools, such as Thot SEO, Impakkt and LLM Brand Tracker.
Strengths:
- In-house tools: Thot SEO, Impakkt, LLM Brand Tracker
- SEO and GEO managed together for visibility in LLMs
- Clear three-step method: define, deploy, manage
Who it's for: Companies that want data-driven SEO, ready for the age of AI search engines.
The 10 Compared in One Table
| # | Company | Who it's for | Key strength | Website |
|---|---|---|---|---|
| 1 | RESONEO | For brands and online retailers, including internationally, that want a data-driven SEO and GEO strategy. | More than 90 expert consultants claimed | resoneo.com |
| 2 | CyberCité | For companies that want an advanced SEO strategy integrated into full-service digital support. | Technical SEO, semantics, link building, logs, local and international | cybercite.fr |
| 3 | Uplix | For brands that want a data-driven SEO strategy combined with Paid Media. | Winner of the Grand Prix Cas d'Or Search & IA | uplix.fr |
| 4 | datashake | For brands that want to manage their SEO alongside their other acquisition channels, in France and internationally. | Traditional SEO and visibility on ChatGPT or Gemini | datashake.fr |
| 5 | Astrak | For e-commerce, SaaS and service companies that want to grow their traffic on Google and in AI tools. | A single senior point of contact from strategy to monitoring | astrak.agency |
| 6 | SEO Monkey | For e-commerce sites, SaaS, marketplaces and service companies that want more visibility on Google and AI tools. | SEO and GEO expertise for Google and AI | seo-monkey.fr |
| 7 | SEOMix | For businesses from micro-companies to large groups whose website runs on WordPress and that want more visibility on Google. | Highly specialised in WordPress SEO since 2008 | seomix.fr |
| 8 | Webconversion | For B2B companies that want to generate qualified leads through search rankings on Google and in AI tools. | Dual SEO and GEO expertise for Google and AI engines | webconversion.fr |
| 9 | Keyweo | For companies that want more visibility on Google and AI search engines, in France and internationally. | Traditional SEO and GEO for visibility on LLMs | keyweo.com |
| 10 | Empirik | For companies that want data-driven SEO, ready for the age of AI search engines. | In-house tools: Thot SEO, Impakkt, LLM Brand Tracker | empirik.fr |
What Should You Check Before Signing?
- Ask for recent case studies in your sector, with quantified, verifiable results.
- Find out exactly who will actually work on your account, and how available they will be.
- Ask for the list of KPIs tracked and the reporting frequency before signing.
- Question the agency about its link-building methods to rule out any risk of a Google penalty.
- Read the commitment period and exit terms carefully, and make sure you keep ownership of your content and your account access.
And Where Does Esekai Fit In?
Esekai is not in this ranking: it isn't an SEO agency. It's a Paris vertical-video studio founded by Tony Lo: creative ads, UGC, content for TikTok, Instagram Reels and YouTube Shorts, plus TikTok Ads and Meta Ads campaigns. More than 350 brands supported in 3 years. These agencies make you findable on Google; Esekai makes you visible in social feeds. Discover Esekai.
Conclusion
There is no single best SEO agency in absolute terms, only the one that suits your website, your market and your goals. Start from your needs, shortlist two or three agencies from this ranking, compare their methods and results, then check every point of the contract before signing.
Honourable Mentions: 10 More Worth Knowing
| Company | Who it's for | Website |
|---|---|---|
| JVWEB | For e-commerce, B2B or lead-generation companies aiming for growth in France and internationally. | jvweb.fr |
| Oscar Référencement | For companies that want their website to generate qualified leads from Google and AI search engines. | oscar-referencement.com |
| Natural-Net | For SMEs, online retailers, associations and institutions that want more visibility on Google and in AI answers. | natural-net.fr |
| Junto | For online retailers, SaaS and lead-gen companies that want to connect SEO, AI visibility and paid acquisition. | junto.fr |
| SEO Hackers | For companies and online retailers that want lasting visibility on Google and AI search engines. | seohackers.fr |
| 410 Gone | For online retailers that want to connect their technical platform with their organic search. | 410-gone.fr |
| Daware | For companies that want to manage their SEO alongside their paid acquisition and improve their conversion rate. | daware.io |
| WeBurst | For online retailers and ambitious companies that want SEO focused on performance and revenue. | weburst.fr |
| Linkweb | For micro-businesses, SMEs and freelancers that want a high-performing website and better visibility on search engines. | linkweb.fr |
| SEOGREEN | For local shops and online retailers that want to be found on Google with a transparent method. | seogreen.fr |
Does your company deserve a place in this ranking? Write to us at contact@esekai.fr: we read every submission.
Frequently Asked Questions
- How much does an SEO agency cost in France?
- Prices vary widely depending on the size of the website, the competition in your sector and the scope of work: one-off audit, monthly support, content production or link building. Ask for several detailed quotes and compare the time actually allocated to your account. Be wary of very cheap offers that promise quick results without explaining their method.
- How long does it take to see SEO results?
- SEO is a medium-term channel. Technical fixes can produce effects fairly quickly. But winning lasting rankings on competitive queries generally takes several months of consistent work. A good agency gives you clear interim milestones, so you can judge progress even before traffic takes off.
- What is GEO and should you care about it?
- GEO, short for Generative Engine Optimization, aims to make your brand visible and cited in the answers of AI engines such as ChatGPT, Perplexity or Google's AI Overviews. With the rise of zero-click searches, it has become a logical complement to SEO. Several agencies in this ranking already include it in their offering.
- Specialist SEO agency or full-service digital agency: which should you choose?
- It all depends on how you're organised. If you already have teams or providers for your other channels, a specialist agency will bring more depth. If you'd rather have a single point of contact for SEO, Paid Media and the rest of your acquisition, an agency such as CyberCité, Uplix or datashake will often be a better fit.