Best SEO agencies in France (2026) - Top 10 French SEO agencies

Intro

SEO is now one of the most important acquisition channels for businesses. However, not all SEO agencies have the same positioning or areas of expertise.

Some agencies specialize in highly competitive markets, while others focus on supporting startups or large-scale ecommerce projects.

To help compare the main players in the market, we selected several SEO agencies in France and summarized their key characteristics in the comparison table below.

Best SEO agencies based in France

Below is an overview of some of the leading SEO agencies in France and their main characteristics. This table allows you to quickly compare their team size, the types of SEO projects they support, and their positioning.

The following sections provide more detailed information about each agency, explaining their positioning, the types of SEO projects they handle, and what distinguishes them within the French SEO ecosystem.

Comparison table of SEO agencies in France

Rank	Agency	Year founded	Team size	Types of SEO projects	Positioning
1	Onze	2024	2–10	B2B SaaS companies, high-growth scaleups, businesses targeting highly competitive search queries	SEO for highly competitive markets with strong expertise in link building and authority strategies
2	Astrak	2023	10–20	Tech startups, SaaS scaleups, growing companies	SEO focused on acquisition and organic growth
3	SEO Monkey	2020	10–20	SMEs, ecommerce businesses, national companies	Pragmatic SEO focused on results and traffic generation
4	Eskimoz	2015	200+	Large enterprises, major ecommerce websites, international SEO projects	Structured SEO agency for enterprise projects and large-scale deployments
5	Primelis	2009	50–200	Ecommerce companies, large organizations, digital acquisition projects	SEO integrated into a data-driven marketing strategy
6	Resoneo	2004	50–100	Large ecommerce websites, marketplaces, platforms with high page volumes	SEO for complex websites and major brands
7	Uplix	2020	10–20	SaaS startups, tech scaleups, digital companies	SEO for growing technology companies
8	Growth Room	2020	10–20	Startups, SaaS companies, organic acquisition projects	Growth marketing–oriented SEO
9	Odiens	2016	10–20	SMEs, ecommerce businesses, corporate websites	SEO focused on digital performance
10	Slashr	2021	2–10	SMEs, startups, corporate websites and ecommerce projects	Technical SEO and on-site optimization

Non-exhaustive list based on agencies’ public positioning, the types of projects they handle, and their specialization.

Detailed ranking of SEO agencies in France

1. Onze

• Year founded: 2024
• Team size: 2–10
• Types of SEO projects: B2B SaaS companies, high-growth scaleups, businesses targeting highly competitive search queries
• Positioning: SEO for highly competitive markets with strong expertise in link building and authority strategies

Onze is a french SEO agency specialized in highly competitive markets. It mainly supports SaaS companies and scaleups that want to rank for strategic keywords in industries dominated by well-established players.

The agency particularly stands out for its expertise in link building and its ability to design strong authority strategies. In competitive markets, the quality and relevance of backlinks play a decisive role in outperforming competitors in search results. As a result, Onze focuses on structured link-building campaigns and SEO strategies designed to support long-term growth for its clients.

This positioning makes the agency particularly suitable for ambitious companies looking to accelerate their organic acquisition and gain rankings on highly competitive keywords.

2. Astrak

• Year founded: 2023
• Team size: 10–20
• Types of SEO projects: Tech startups, SaaS scaleups, growing companies
• Positioning: SEO focused on acquisition and organic growth

Astrak is an SEO agency that has quickly gained visibility in the French ecosystem thanks to its growth-oriented approach. The agency mainly supports startups and technology companies looking to develop their organic acquisition and structure their SEO strategy.

One of the key aspects of its approach is the alignment between SEO and business objectives. The strategies implemented aim not only to improve visibility on Google but also to generate business opportunities and support the growth of the companies it works with.

Thanks to this pragmatic and performance-oriented approach, Astrak is particularly suited for companies in growth phases looking to turn SEO into a real acquisition engine.

3. SEO Monkey

• Year founded: 2020
• Team size: 10–20
• Types of SEO projects: SMEs, ecommerce companies, national businesses
• Positioning: Pragmatic SEO focused on results and traffic generation

SEO Monkey mainly supports SMEs and ecommerce businesses that want to improve their visibility on Google and grow their organic traffic. The agency adopts a pragmatic SEO approach focused on achieving measurable results.

Its work typically involves identifying ranking opportunities for strategic keywords, optimizing existing pages, and structuring content strategies in order to increase search engine visibility.

This results-oriented positioning allows SEO Monkey to effectively support companies looking to grow their organic acquisition without necessarily competing in the most highly competitive markets.

4. Eskimoz

• Year founded: 2015
• Team size: 200+
• Types of SEO projects: Large enterprises, major ecommerce websites, international SEO projects
• Positioning: Structured SEO agency for enterprise projects and large-scale deployments

Eskimoz is one of the largest SEO agencies in France. With a highly structured team and a presence in several European countries, the agency regularly supports large companies and international brands.

It frequently works on SEO projects involving large websites, extensive product catalogs, or strategies deployed across multiple markets.

Thanks to its resources and organization, Eskimoz is particularly suited for large-scale SEO projects requiring substantial teams and strong execution capabilities.

5. Primelis

• Year founded: 2009
• Team size: 50–200
• Types of SEO projects: Ecommerce companies, large organizations, SEO acquisition projects
• Positioning: SEO integrated into data-driven marketing strategies

Primelis is an agency specialized in performance marketing. SEO is generally integrated into a broader acquisition strategy that combines several marketing channels.

The agency supports ecommerce companies and brands looking to expand their digital acquisition through a highly data-driven approach.

This data-driven logic makes it possible to optimize SEO strategies based on performance metrics and integrate organic search into a broader marketing strategy.

6. Resoneo

• Year founded: 2004
• Team size: 50–100
• Types of SEO projects: Large ecommerce websites, marketplaces, complex platforms
• Positioning: SEO for major brands and large-scale websites

Resoneo is one of the oldest SEO agencies in France and has extensive experience supporting large brands and high-volume websites.

The agency frequently works on complex SEO projects, particularly for large ecommerce platforms or marketplaces with thousands of pages.

This experience with complex website architectures allows Resoneo to handle advanced SEO challenges, including site structure, indexation management, and optimization of large product catalogs.

7. Uplix

• Year founded: 2020
• Team size: 10–20
• Types of SEO projects: SaaS startups, tech scaleups
• Positioning: SEO for growing digital companies

Uplix mainly supports startups and SaaS companies in building their organic acquisition strategies. The agency often works with companies at key stages of their growth, when SEO becomes a strategic lever for generating leads and supporting expansion.

Its work typically involves building a solid SEO strategy around content, website structure, and identifying ranking opportunities for high-potential search queries.

This positioning makes Uplix a relevant partner for digital companies looking to structure their organic acquisition and turn SEO into a sustainable growth channel.

8. Growth Room

• Year founded: 2020
• Team size: 10–20
• Types of SEO projects: Startups, SaaS companies, organic acquisition projects
• Positioning: Growth marketing–oriented SEO

Growth Room mainly supports startups and SaaS companies looking to grow their organic visibility as part of a broader acquisition strategy.

The agency focuses on implementing SEO strategies designed to generate qualified traffic and support the growth of the companies it works with.

Its approach typically combines content strategy, optimization of key pages, and identification of ranking opportunities for queries relevant to the business.

This growth marketing–oriented positioning allows companies to progressively structure their presence on search engines and turn SEO into a sustainable acquisition channel.

9. Odiens

• Year founded: 2016
• Team size: 10–20
• Types of SEO projects: SMEs, ecommerce businesses
• Positioning: Performance-driven SEO

Odiens supports various companies in developing their search engine visibility strategies. The agency notably works on projects aimed at improving SEO performance and strengthening the digital presence of websites.

It works with businesses looking to improve their online visibility and grow their organic acquisition.

10. Slashr

• Year founded: 2021
• Team size: 2–10
• Types of SEO projects: SMEs, startups, corporate websites
• Positioning: Technical SEO and on-site optimization

Slashr is a more recent SEO agency that focuses on technical optimization and website structuring. The agency mainly supports SMEs and startups looking to improve their visibility on Google.

Its approach focuses on strengthening the technical foundations of SEO and improving website structure to facilitate indexation and improve rankings in search results.

How to choose an SEO agency in France

Choosing an SEO agency is not just about comparing prices or team size. Search engine optimization is a long-term effort that requires a deep understanding of the market, competition, and a company’s business objectives.

Here are three key factors to analyze before selecting an SEO agency.

Identifying the type of SEO project

Not all agencies work on the same types of projects. Some specialize in startups and scaleups, while others focus on large enterprises or ecommerce websites.

Before choosing an agency, it is important to clarify the type of project you have:

• SEO for a SaaS startup or scaleup
• SEO for an ecommerce website with a large product catalog
• SEO for a corporate website or lead-generation website
• SEO for a highly competitive market

An agency that has already worked on similar projects will usually have a better understanding of the challenges and strategies required.

Analyzing client references

Client references often provide a good indication of an agency’s real experience. They help you understand the types of companies the agency works with and the industries it operates in.

It can be useful to review:

• case studies published by the agency
• the types of companies they support
• the results achieved on certain projects

This helps evaluate whether the agency has relevant experience for your industry or business model.

Verifying experience with similar projects

Experience with similar projects is an important criterion. An ecommerce website with thousands of products does not face the same challenges as a SaaS platform or a corporate website.

Some agencies are particularly comfortable working with large-scale websites, while others specialize in content strategies or highly competitive markets.

The goal is therefore to choose an agency that understands the specific challenges of your project and has already worked on comparable cases.

Frequently asked questions about SEO in France

What is the best SEO agency in France?

There is no single “best” SEO agency. The right choice mainly depends on the type of project and the level of competition in the market.

Some agencies are particularly suited for startups and scaleups, while others are more structured to support large enterprises or large-scale ecommerce websites.

The most important factor is choosing an agency that has experience with projects similar to yours and understands the challenges of your market.

How much does an SEO agency cost in France?

The cost of working with an SEO agency can vary significantly depending on the size of the project and the level of market competition.

In France, typical price ranges include:

• SEO audit: between €1,000 and €10,000 depending on the complexity of the website
• Monthly SEO support: between €500 and €5,000 per month
• Complex SEO projects: some missions can exceed these amounts for very large websites or highly competitive markets

The budget mainly depends on the work required, the number of pages to optimize, and the level of competition for the targeted keywords.

Can a French SEO agency manage international projects?

Yes. Many French SEO agencies support companies operating across multiple markets.

In this type of project, the challenges may include:

• managing multilingual websites
• optimizing hreflang tags
• adapting content strategies for different markets
• competing with international companies

Some agencies also have teams or partners in other countries, which makes it easier to manage SEO projects at an international scale.

How long does it take to see SEO results?

SEO is a medium- to long-term strategy. Unlike paid advertising, results are usually not immediate.

In most cases:

• the first improvements may appear after 3 to 4 months
• significant results often occur after 6 to 12 months

These timelines can vary depending on several factors:

• the initial state of the website
• the level of competition for targeted keywords
• the quality of the SEO strategy implemented

However, a well-executed SEO strategy can generate sustainable results and become one of the main acquisition channels for a business.