| # | Company | Employees |
|---|---|---|
| 1 |
Dassault Aviationdassault-aviation.com
French aerospace company designs, builds military aircraft, business jets, and space systems. Leader in new generation fighters, Rafale, Falcon jets, and pioneering digital technologies. |
7,267 |
| 2 |
Asteelflashasteelflash.com
Provides electronic manufacturing services and supply-chain management solutions from new product introduction to mass production across diverse global technology markets through seventeen locations. |
1,878 |
| 3 |
Ethypharmethypharm.com
Manufactures essential hospital drugs focusing on pain, addiction, and internal medicine with global presence and multiple production sites. |
1,127 |
| 4 |
Centre Hospitalier des Quatre Villes - CH4Vch4v.fr
Public healthcare facility with 598 beds, formed by merging two hospitals, employing 1,200 staff to provide medical services. |
501 |
| 5 |
OGER INTERNATIONAL CORPoger.international
Global engineering and architecture firm specializing in complex projects, BIM, sustainable development, and integrated project management across multiple countries. |
443 |
| 6 |
OUTSCALEoutscale.com
Sovereign cloud operator providing virtual twin solutions for data control, cyber governance, and sustainable infrastructure optimization for organizations. |
355 |
| 7 |
Mairie de Saint-Cloudsaintcloud.fr
Support and develop local economic activity, assist residents with employment and business creation, facilitate connections among businesses and community stakeholders. |
313 |
| 8 |
REPSCO, an IQVIA businessrepsco.fr
Specialized pharmaceutical promotion and recruitment services in France, enhancing market share, adapting to industry changes, and leveraging digital innovation. |
306 |
| 9 |
Sofren Groupvulcain-eng.com
An international consulting company specializing in engineering, management, and industrial strategy for the Energy, Industry, and Infrastructure sectors |
297 |
| 10 |
American School of Parisasparis.org
Providing personalized American-style PK-12 education with small classes, bilingual curriculum, AP and IB programs, and community English immersion courses. |
270 |
| 11 |
SKiSETskiset.com
Chain of ski and snowboard rental stores operating over 850 locations across Europe and North America serving millions of customers annually. |
260 |
| 12 | 238 | |
| 13 |
EASYTEAMeasyteam.fr
Global provider of Oracle solutions including implementation, management, training, and software asset management for businesses and administrations in France. |
231 |
| 14 |
SAINTCLAIRgroupepoteletchabot.com
The company specializes in creating exceptional events where gastronomy and scenography merge to make every moment unforgettable, emphasizing sincere connections and creativity They also host corporate, institutional, and family gatherings in exclusive venues |
228 |
| 15 |
ComeBack Graphiccomeback.fr
ComeBack is a marketing production agency specializing in customized communication solutions for ambitious brands, optimizing campaigns, managing actions, and innovating with FeedBack tools |
222 |
| 16 |
Lycée Alexandre Dumaslyc-dumas-st-cloud.ac-versailles.fr
A French high school located in Saint-Cloud, Hauts-de-Seine, Île-de-France, providing education to students in the region |
149 |
| 17 |
Constellationconstellation.fr
A group of 14 specialized companies offering IT solutions for digital and environmental transformation, including training, consulting, development, integration, and security services |
146 |
| 18 |
Filassistancefilassistance.fr
A subsidiary of CNP Assurances, specializing in assistance for individuals and property, with 85 million beneficiaries and a revenue of 525 million euros in 2022 |
128 |
| 19 |
Goelettgoelett.com
Delivering innovative business travel solutions with a focus on providing a fantastic experience for every business traveler, now part of CDS Groupe |
114 |
| 20 |
iagonaiagona.com
With 30 years of experience, Iagona provides digital self-service solutions integrating payment methods, office automation, security, digital signage, and more |
112 |
| 21 |
Clinique du Val d'Or - Vivalto Santécliniquevaldor.vivalto-sante.com
Provides hospital and health care services to patients, operating from its location in Saint-Cloud, IDF, France, as part of the Vivalto Santé network. |
98 |
| 22 |
Premium Contactpremiumcontact.fr
Organizes business-oriented events like one-to-one demo days and demo fairs, connecting companies seeking skills with those offering them in various sectors. |
92 |
| 23 | 91 | |
| 24 |
Universal Medica Groupuniversalmedicagroup.com
A healthcare support company offering personalized solutions, medical content, compliance consulting, training, digital media, medical education, and patient-centric solutions |
83 |
| 25 | 78 | |
| 26 |
ECODROPecodrop.net
Ecodrop offers a convenient, cost-effective, and eco-friendly solution for construction waste removal, with services nationwide for builders and homeowners |
73 |
| 27 |
White Birdwhitebird.immo
Modern property management services focusing on personalized client support, managing assets, and transforming traditional real estate administration for owners and investors. |
68 |
| 28 |
Fédération Française de Bridgeffbridge.fr
An association promoting, organizing, and developing bridge in France with 1150 clubs, 91,000 members, and 7,000,000 competitors annually |
67 |
| 29 |
Login Sécuritélogin-securite.com
Provides cybersecurity and network consulting services including risk identification, operational monitoring, custom solutions, and digital trust strategy implementation for enterprises. |
61 |
| 30 |
Probanceprobance.com
This company provides a multichannel Marketing Automation platform that collects and analyzes data to improve marketing campaigns and customer knowledge |
60 |
| 31 |
CG2 Conseilcg2conseil.com
Specialized consulting firm offering business analysis assistance and project management for complex transformation projects |
60 |
| 32 |
Festival Rock en Seinerockenseine.com
Large summer rock festival in France, featuring international pop-rock acts and emerging artists across five stages, alongside artistic exhibitions and a dedicated children's festival. |
58 |
| 33 |
Universal Medicauniversalmedica.com
Provides advice, support, digital solutions for healthcare stakeholders in vigilance, medical information, quality management outsourcing, ensuring patient safety and proper medicine use. |
50 |
| 34 |
EXPACEOexpaceo.com
A consulting company specializing in Microsoft technologies, providing services such as consulting, architecture, technical support, training, and custom development for national and international clients |
50 |
| 35 |
Syspertec Groupsyspertec.com
Develops software solutions for information system integration, modernizing mainframe applications, and providing a data aggregation platform for regulatory compliance and risk analysis. |
40 |
| 36 |
Synapse Risk & Compliancesynapse-rc.com
Provides access to top data sources, simplifies compliance, secures third-party relationships, and enables proactive, collaborative risk management for diverse projects. |
35 |
| 37 |
QILIN COMPANYqilincompany.com
A global real estate operator focused on transforming existing properties to meet modern societal, environmental, and economic needs through innovative and sustainable solutions |
32 |
| 38 |
Clariteamclariteam.com
CLARITEAM specializes in IT infrastructure and information system performance, helping DSI teams meet business flexibility and agility requirements through various services |
32 |
| 39 | 32 | |
| 40 |
Laboratoire ImmuBioimmubio.fr
French laboratory specializing in microbiota issues, offering medical devices and dietary supplements developed with Danish bacterial research expertise. |
26 |
| 41 |
Europharma For Life Scienceeuropharma.fr
A subsidiary of Universal Medica Group, Europharma provides tailored training solutions for healthcare professionals, including content creation, certification, and e-learning platforms |
26 |
| 42 | 24 | |
| 43 | 21 | |
| 44 |
LYDE Conseillyde-conseil.com
Independent consulting firm combining technical and business expertise to support and secure IT and business projects with committed consultants. |
20 |
| 45 |
AllSessionsallsessions.fr
The company offers a web and mobile platform for organizing and managing corporate sports activities to improve employee well-being and team cohesion |
18 |
| 46 |
CAPINVEST
Capinvest brings elegance to the west of France, offering carefully selected fashion, beauty, and toy products with values of kindness, sharing, and commitment |
18 |
| 47 |
Talentuptalentup.com
A network of recruitment professionals providing HR tools, media plans, and website creation services to assist companies in finding suitable candidates globally |
14 |
| 48 |
SprintProjectsprint-project.com
A competitive intelligence firm specializing in strategy consolidation, innovation trend education, transformation support, start-up collaboration, and innovative program leadership |
14 |
| 49 |
ETEL CONSULTINGaptea.net
Providing consulting, technical support, testing, and project management services to banking, insurance, industry, and media sectors. |
11 |
| 50 |
Vectans Pharmavectanspharma.com
An international pharmaceutical company based in France focused on optimizing existing treatments and developing innovative products for anti-infectives and supportive care |
10 |
| 51 |
Fabrickfabrick.io
Fabrick is an agile team specialized in eco-friendly design, development, and integration of enterprise applications, offering complete, relevant solutions for businesses |
10 |
| 52 |
BIO-GOUJARDbio-goujard.fr
Specializing in diagnosing, monitoring, and analyzing food, cosmetics, water, air, materials, asbestos, lead, and legionella for various industries |
10 |
| 53 |
ChannelHubchannel-summit.com
Organizes events in EMEA region for IT & Consumer tech brands and channels, connecting distributors, retailers, and resellers for networking and partnership opportunities |
10 |
| 54 |
OM CONSEILom-conseil.fr
The company provides IT consulting and support in healthcare, disability services, regulatory control, local government, and process optimization for overall success Hundreds of thousands benefit daily |
8 |
| 55 |
L'agence Cm Communicationcmcommunication.fr
A communication agency founded in 2014, specializing in print and digital communication, providing agile solutions and expertise in strategy, web development, and content creation |
8 |
| 56 |
Accenture Technology Academyarismore-academy.com
Providing innovative training programs to empower individuals by acquiring new skills, tools, and collaborative capabilities for enterprise transformation |
7 |
| 57 |
Motor-emotor-e.com
Expertise in electric, hybrid, and ADAS vehicle systems including electronics, embedded software, design, prototyping, and functional validation tracking. |
6 |
| 58 |
Admaker TMadmaker.fr
Admaker TM is an independent web marketing agency specializing in web and mobile productions, offering expertise and creativity to bring all your web projects to life |
6 |
| 59 |
PARIS SAINT CLOUD HOTEL - Le PSCHILL Restaurantpsch.fr
Hospitality company based in Saint Cloud, France, specializing in organizing team building events and other services Contact us via our website or phone |
6 |
| 60 |
BNI Développeurs d'Energie - Saint-Cloudbnifrance.fr
A BNI Group for entrepreneurs seeking sales growth, with one member per profession, measured results, shared mindset, solidarity, and proven methods Join us! |
4 |
| 61 | 3 | |
| 62 |
Happy Cruise in Parishappycruiseparis.com
Organize private boat cruises and professional events on the Seine River, showcasing iconic Parisian monuments for memorable experiences, including corporate seminars and team building. |
2 |
| 63 |
AFLUENSafluens.fr
Independent group specializing in creative cross-media communication, offering tailored marketing and production services for premium brand strategies. |
2 |
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
The same list elsewhere in France
- The largest companies in France 75,805
- The largest companies in Île-de-France 30,863
- The largest companies in Auvergne-Rhône-Alpes 8,971
- The largest companies in Provence-Alpes-Côte d'Azur 5,836
- The largest companies in Occitanie 4,823
- The largest companies in Grand Est 4,506
- The largest companies in Nouvelle-Aquitaine 4,424
- The largest companies in Hauts-de-France 3,752
- The largest companies in Pays de la Loire 3,573
- The largest companies in Brittany 2,535
- The largest companies in Normandy 1,814
- The largest companies in Bourgogne-Franche-Comté 1,549
- The largest companies in Centre-Val de Loire 1,385
- The largest companies in Paris 19,499
- The largest companies in Lyon 2,238
- The largest companies in Marseille 1,366
- The largest companies in Toulouse 1,331
- The largest companies in Bordeaux 928
- The largest companies in Nantes 796
- The largest companies in Lille 731
- The largest companies in Boulogne-Billancourt 701
- The largest companies in Montpellier 633
- The largest companies in Aix-en-Provence 571
- The largest companies in Strasbourg 547