Updated June 2026. France's IT services sector runs on the ESN model (Entreprise de Services du Numérique), where firms place salaried consultants on client missions. Capgemini is the French global leader, followed by domestic ESNs like Sopra Steria, Atos, and Inetum, while Accenture France and Devoteam round out the field. Many roles expect working French, but international, cloud, and cybersecurity teams often run in English.
Key takeaways
- An ESN (formerly SSII) hires consultants on a CDI and places them on client missions.
- Capgemini is the French-headquartered global leader; Sopra Steria, Atos, and Inetum are the big domestic ESNs.
- Accenture France pairs consulting with technology; Devoteam specialises in cloud across GCP, AWS, and Azure.
- Alten and Akkodis focus on engineering and IT staffing under the same model.
- A CDI at a large ESN is a common route for non-EU professionals who need visa sponsorship.
Which IT services companies are top in France?
The best firm depends on the kind of mission you want and your specialism. For scale and global mobility, Capgemini is the French global leader. For public-sector and banking technology, Sopra Steria runs a deep pipeline of long-term projects. For cloud and cybersecurity, Atos is a large infrastructure and security house, while Devoteam focuses on cloud platforms. For pan-European IT services, Inetum has a wide footprint, and Accenture Francepairs consulting with technology at scale. Apply through each firm's official careers site.
Capgemini
Capgemini is the French-headquartered global leader in IT services and consulting, with the widest range of missions across banking, industry, and the public sector. Its size and international presence make internal mobility and global transfers realistic for consultants.
Why we recommend it: The French global leader in IT services with the widest range of missions and strong global mobility for consultants.
Pros
- +Widest range of missions across sectors
- +Strong internal and global mobility
- +Well-known name for visa sponsorship on a CDI
Cons
- −Large-firm processes can feel bureaucratic
- −Some missions are client-driven rather than chosen
- ESN and consulting on the CDI model
- Missions across banking, industry, and public sector
- International offices for global transfers
Sopra Steria
Sopra Steria is a major French ESN with deep expertise in public-sector and banking technology, running a large pipeline of long-term client missions. It is a strong choice for consultants who want stable, sector-focused projects.
Why we recommend it: A major French ESN strong in public-sector and banking technology, with a large pipeline of long-term missions.
Pros
- +Deep public-sector and banking practice
- +Long-term, stable client missions
- +Large domestic ESN with broad hiring
Cons
- −Public-sector missions often expect working French
- −Less cloud-native than specialist consultancies
- French ESN on the CDI model
- Public administration and financial services focus
- Systems integration and managed services
Atos
Atos is a large French IT services group focused on cloud, digital, and cybersecurity, with substantial managed-services and infrastructure practices. It suits engineers who want cloud, security, and infrastructure missions at scale.
Why we recommend it: A large French IT services group focused on cloud, digital, and cybersecurity, with big managed-services and infrastructure practices.
Pros
- +Strong cloud, security, and infrastructure practices
- +Large managed-services portfolio
- +International presence for technical roles
Cons
- −Group has been through restructuring; verify current scope
- −Less strategy-consulting focus than rivals
- French IT services group
- Cloud, digital, and cybersecurity focus
- Managed services and infrastructure
Inetum
Inetum is a French ESN with a strong European footprint, blending consulting, software, and infrastructure services across many countries. It is a good fit for consultants who want cross-border missions within Europe.
Why we recommend it: A French ESN with a strong European footprint, blending consulting, software, and infrastructure services across many countries.
Pros
- +Wide European footprint and cross-border missions
- +Mix of consulting, software, and infrastructure
- +Broad sector coverage
Cons
- −Less globally recognised than the largest ESNs
- −Breadth can mean less deep specialism per office
- French ESN on the CDI model
- Consulting, software, and infrastructure services
- Offices across many European countries
Accenture France
Accenture France is the French practice of the global consultancy, combining strategy consulting with large-scale technology and systems integration work. It suits people who want consulting alongside hands-on technology delivery.
Why we recommend it: The French practice of the global consultancy, combining strategy consulting with large-scale technology and systems integration work.
Pros
- +Strategy consulting plus technology delivery
- +Large-scale transformation programmes
- +Strong global brand and mobility
Cons
- −Consulting pace and travel can be demanding
- −Some roles expect prior consulting experience
- Global consultancy, French practice
- Strategy, technology, and systems integration
- International network for transfers
Devoteam
Devoteam is a French consultancy specialised in cloud and platform work across GCP, AWS, and Azure, popular with engineers who want cloud-focused missions. It is a strong option for certified cloud specialists and platform engineers.
Why we recommend it: A French consultancy specialised in cloud and platform work across GCP, AWS, and Azure, popular with engineers who want cloud-focused missions.
Pros
- +Deep cloud focus across GCP, AWS, and Azure
- +Certification-driven, technical culture
- +Good fit for platform and DevOps engineers
Cons
- −Narrower than full-service ESNs
- −Best suited to cloud specialists
- French cloud and platform consultancy
- Partnerships across GCP, AWS, and Azure
- Certification-led engineering culture
Ranking and firm profiles as of June 2026. TODO(verify): headcount, revenue, and salary figures change; confirm current numbers on each firm's site before quoting them.
What is an ESN and how does the model work?
An ESN is an Entreprise de Services du Numérique, the modern name for what used to be called an SSII(Société de Services et d'Ingénierie Informatique). An ESN hires IT professionals on a CDI (a permanent contract) and then places them on client missions: fixed engagements at a client such as a bank, insurer, public administration, or manufacturer. You stay a salaried employee of the ESN between missions, which is the key difference from a pure staffing or intérim agency that places temporary workers directly with a client.
- Step 1: The ESN hires you on a CDI as a consultant.
- Step 2: A commercial team matches your skills to a client mission.
- Step 3: You deliver work on-site or remotely for that client; the ESN bills the client.
- Step 4: When a mission ends, you move to the next one, staying employed throughout (the intercontrat period).
- Step 5: Career growth comes from mission variety, certifications, and moving into lead or architect roles.
Some firms lean heavily into engineering and IT staffing under this model. Alten and Akkodis are two large players that specialise in placing engineering and IT consultants, alongside the full-service ESNs above.
ESN vs staffing agency
How do you get hired at a French ESN?
Apply directly through the firm's official careers site for a CDI. ESNs hire in volume, so a solid technical profile, relevant certifications, and clear specialism (cloud, cybersecurity, data, SAP, and so on) go a long way. The interview usually covers a technical screen and a fit conversation, and larger firms often keep a bench of open roles year-round. For non-EU candidates, a CDI from a large employer is the strongest basis for a work visa: see our work visa guide for the passeport talent and salarié routes, and our EU citizens guide if you already hold EU rights.
- Target a specialism: cloud, cybersecurity, data, or a client sector helps you stand out.
- Apply on official sites: use each firm's careers portal rather than aggregators.
- Certifications help: GCP, AWS, Azure, or security certifications match many missions.
- Aim for a CDI: a permanent contract is the strongest visa basis for non-EU candidates.
Non-EU: check the visa route first
How English-friendly are French tech employers?
It varies by employer and, at an ESN, by the mission. Many client-facing roles in banking, insurance, or the public sector expect working French, both for day-to-day collaboration and for documentation. But large international teams, product engineering, and cloud and cybersecurity practices frequently operate in English, especially inside global firms like Capgemini and Accenture France. If your French is limited, target English-language teams and international missions, and treat learning French as a medium-term investment that widens the missions open to you.
- Client-facing roles: banking, insurance, and public-sector missions often expect French.
- International teams: cloud, cybersecurity, and product engineering frequently run in English.
- Global firms: Capgemini and Accenture France have many English-language teams.
- Long term: French widens the missions open to you and helps with client trust.
Frequently Asked Questions
What does ESN stand for in France?
ESN stands for Entreprise de Services du Numérique, the modern name for what used to be called an SSII (Société de Services et d'Ingénierie Informatique). An ESN is an IT services and consulting firm that places its salaried consultants on client projects, or missions, across sectors such as banking, public administration, industry, and retail.
Which is the biggest IT services company in France?
Capgemini is the French-headquartered global leader in IT services and consulting, followed by large domestic ESNs such as Sopra Steria, Atos, and Inetum. Global consultancies like Accenture also run substantial French practices. Exact rankings by headcount and revenue shift year to year, so verify current figures before quoting them.
Do you need to speak French to work at a French ESN?
It depends on the client and the mission. Many client-facing roles in banking, insurance, or the public sector expect working French, while international teams, cloud and cybersecurity practices, and product engineering often operate in English. A CDI at a large ESN is a common route for non-EU professionals who need visa sponsorship.
What is the difference between an ESN and a staffing agency?
An ESN hires consultants on permanent contracts (usually a CDI) and bills clients for their work on missions, so the consultant stays a salaried employee of the ESN between assignments. A pure staffing or intérim agency places temporary workers directly with a client. Firms like Alten and Akkodis focus heavily on engineering and IT staffing under the ESN model.
How do you get hired at an ESN as a non-EU candidate?
Apply through the ESN's official careers site for a CDI, since a permanent contract from a large employer is the strongest basis for a work visa. Check our work visa guide for the passeport talent and salarié routes, and our EU citizens guide if you already hold EU rights. TODO(verify): salary thresholds and visa criteria change, so confirm current rules before applying.
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