These companies are primarily large and mid-sized organizations focused on education, professional training, and human resources within the Hauts-de-Seine department. The sector includes a mix of private and non-profit entities, with a strong emphasis on vocational and higher education, as well as broader HR services and social support.
Key players include My own company, providing project management and English teaching; Croix-Rouge française, managing health and training establishments; Synergie France, a leader in HR services; and CESI, an engineering school with vocational training. A notable pattern is the concentration of headquarters in cities like Courbevoie and Levallois-Perret, indicating a hub for educational and professional service providers.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Croix-Rouge françaisecroix-rouge.fr
Manages a network of health, medico-social, and training establishments and services, employing staff dedicated to assisting vulnerable populations. |
10,865 | |||
| 2 |
Synergie Francesynergie.fr
French leader in HR services: recruitment, training, and HR consulting Providing solutions in various sectors, emphasizing proximity, performance, and diversity |
4,804 | |||
| 3 | 3,457 | ||||
| 4 |
Réseau Compétences et Développementcompetences-developpement.com
Network of higher education schools and training centers in France and internationally, preparing professionals across various fields, from management to tech. |
3,434 | |||
| 5 |
Babiloubabilou.fr
International network of nurseries and schools providing parenting solutions for employees through high-quality childcare facilities and professional work-life balance support services worldwide. |
1,686 | |||
| 6 |
IFP Schoolifp-school.com
Graduate engineering school specializing in energy, sustainable mobility, motorization, economy, processes, and energy transition technologies and solutions. |
1,339 | |||
| 7 |
Cegos Francecegos.fr
Provides extensive professional training and development programs across management, leadership, HR, marketing, and project management internationally with expert consultants. |
1,259 | |||
| 8 |
Ifac associationifac.asso.fr
A major actor in French educational activities, providing educational and recreational programs to complement school for communities and associations |
1,208 | |||
| 9 |
Pigierpigier.com
PIGIER is a network of professional schools in France offering validated educational courses leading to state diplomas or professional certifications |
1,139 | |||
| 10 |
Croix-Rouge Compétencecroix-rouge.fr
Manages 157 training institutes across 60 sites, specializing in healthcare, social, and occupational health and safety. Prepares individuals for 30 professions and supports professionals skill development. |
1,093 | |||
| 11 |
EPIDE Défense 2e Chanceepide.fr
Support young people aged 18 to 25 without diplomas or qualifications, helping them reintegrate into employment and society. |
1,089 | |||
| 12 |
SOFTEAMsofteam.com
Accompanying transformations long-term; imagining, designing, operating future services; combining consulting, digital solutions, and service excellence for various sectors, leveraging over 1,650 experts. |
1,003 | |||
| 13 |
Lefebvre Dallozlefebvre-dalloz.fr
A leading provider of legal and tax knowledge through publishing, training, and software services, catering to various professionals and businesses in France |
728 | |||
| 14 |
CCI Francecci.fr
Federation of French Chambers of Commerce supporting 2 million companies with economic intelligence, development, education, and environmental sustainability coordination. |
713 | |||
| 15 |
Skill and Youskillandyou.com
Making training and professional success accessible to everyone with a catalog of more than 200 courses for learners across France and beyond. |
703 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
EPSI - L'école d'ingénierie informatiqueepsi.fr
Educates future IT experts from two to five years of post-secondary education, across various specializations like AI, cybersecurity, cloud, data, development, and infrastructure. |
641 | |||
| 17 |
EDUSERVICESgroupe-eduservices.fr
Leading private group providing professional training, national schools, and vocational degrees from vocational certificates to masters levels through apprenticeships and specialized campus networks. |
603 | |||
| 18 |
Win Sport Schoolwin-sport-school.com
Management school specializing in sport, marketing, event organization, sponsorship, and commercial development with programs across Europe and France. |
582 | |||
| 19 |
Ipac Bachelor Factoryipacbachelorfactory.com
A post-baccalaureate business school offering 19 three-year programs, focused on employability Recognized for innovative, practical education with top-ranked programs in various fields |
558 | |||
| 20 |
IFCAMca-ifcam.fr
IFCAM is the training center serving the development of human capital for the Crédit Agricole Group through innovative and specialized programs |
555 | |||
| 21 |
Groupe Promotranspromotrans.fr
Professional training provider specializing in logistics, supply chain, freight and passenger transport, industrial vehicle maintenance, construction, and workplace safety since 1966. |
549 | |||
| 22 |
ESILV - Ecole Supérieure d'Ingénieurs Léonard de Vinciesilv.fr
A specialized graduate school of engineering focused on digital sciences with 4 major specializations offering comprehensive education and international opportunities for students |
521 | |||
| 23 |
Hervé Schauer Consultants (HSC)hs2.fr
Provides information security consulting, audits, penetration tests, risk management, and training services to secure diverse infrastructures and systems. |
500 | |||
| 24 |
PSE-Pour un Sourire d'enfantpse.ong
A non-profit organization in Cambodia helping children in need with nutrition, healthcare, education, vocational training, and family support programs |
473 | |||
| 25 |
EMLV - École de Management Léonard de Vinciemlv.fr
French business and management school offering Master's degree, Grande Ecole Programme, MSc's, and MBA Accredited by AACSB, AMBA, & EFMD |
464 | |||
| 26 |
OPCO Mobilitésopcomobilites.fr
Finances training, apprenticeships, and skill development for mobility sector employees. Supports anticipating future job needs, creating certifications, and promoting professions in automotive, logistics, and transport. |
441 | |||
| 27 |
GNFAmobipolis.fr
Provides tailored training, consulting, and evaluation services to automotive businesses, enhancing workforce skills and supporting company growth. |
427 | |||
| 28 |
IECD - Institut Européen de Coopération et de Développementiecd.org
A development organization in Africa, MENA, Madagascar, and Southeast Asia, empowering youth, adults, professionals, and communities through vocational training, entrepreneurship support, education, and healthcare |
417 | |||
| 29 |
AFCI Formationafci-formation.fr
Professional training and consulting services focused on employment integration, specializing in hospitality, social, and healthcare sectors. |
380 | |||
| 30 |
OPCO Santébit.ly
Manages professional training funds, offers employment and training solutions, facilitates apprenticeships, and supports small and medium-sized businesses in the health sector. |
364 | |||
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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 Nov 12, 2026.
More company lists in the Hauts-de-Seine department
- The largest companies in the Hauts-de-Seine department 5,160
- Multinational companies in the Hauts-de-Seine department 1,231
- IT services companies in the Hauts-de-Seine department 737
- IT Services and IT Consulting companies in the Hauts-de-Seine department 706
- Professional services firms in the Hauts-de-Seine department 629
- Consulting firms in the Hauts-de-Seine department 563
- Companies with in-house R&D in the Hauts-de-Seine department 510
- SaaS companies in the Hauts-de-Seine department 389
- Business Consulting and Services companies in the Hauts-de-Seine department 304
- Software Development companies in the Hauts-de-Seine department 301
- Retail chains in the Hauts-de-Seine department 292
- Manufacturers in the Hauts-de-Seine department 285
- Advertising Services companies in the Hauts-de-Seine department 281
- Marketing and communications agencies in the Hauts-de-Seine department 235
- Subscription businesses in the Hauts-de-Seine department 228
- Hardware manufacturers in the Hauts-de-Seine department 199
- Financial services firms in the Hauts-de-Seine department 198
- Companies with a mobile app in the Hauts-de-Seine department 189
- Critical infrastructure operators in the Hauts-de-Seine department 169
- AI companies in the Hauts-de-Seine department 159
- Cybersecurity companies in the Hauts-de-Seine department 154
- Distributors and wholesalers in the Hauts-de-Seine department 154
- Recruitment and staffing agencies in the Hauts-de-Seine department 152
- Energy companies in the Hauts-de-Seine department 144
The same list elsewhere in France
- Education providers in Île-de-France 1,300
- Education providers in Auvergne-Rhône-Alpes 309
- Education providers in Grand Est 215
- Education providers in Provence-Alpes-Côte d'Azur 212
- Education providers in Occitanie 201
- Education providers in Nouvelle-Aquitaine 173
- Education providers in the Rhône department 154
- Education providers in Hauts-de-France 148
- Education providers in Pays de la Loire 143
- Education providers in the Bouches-du-Rhône department 119
- Education providers in Brittany 112
- Education providers in the Nord department 103
- Education providers in Normandy 100
- Education providers in the Haute-Garonne department 94
- Education providers in the Gironde department 80
- Education providers in the Val-de-Marne department 72
- Education providers in Bourgogne-Franche-Comté 69
- Education providers in the Seine-Saint-Denis department 69
- Education providers in the Loire-Atlantique department 68
- Education providers in the Hérault department 61
- Education providers in the Ille-et-Vilaine department 60
- Education providers in Paris 812
- Education providers in Lyon 107
- Education providers in Toulouse 67