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Top 30 companies with in-house R&D in the Seine-et-Marne department

Tamtam tracks 104 companies with in-house R&D headquartered in the Seine-et-Marne department. This list ranks the 30 largest by number of employees on LinkedIn, led by Grand Hôpital de l'Est Francilien, ACRELEC and Fives Maintenance. Their median headcount is 124. Half of them were founded in 1985 or later. The most common headquarters are Lieusaint (3) and Serris (2).

🇫🇷 Seine-et-Marne30 companiesUpdated Nov 14, 2026

The largest companies with in-house R&D in Seine-et-Marne include a mix of established industrial firms and younger technology-focused businesses. Key players are Grand Hôpital de l'Est Francilien, an integrated hospital network; ACRELEC, a global technology company for retail; Fives Maintenance, specializing in industrial maintenance; and ENCRES DUBUIT, which develops specialized inks. These companies span healthcare, manufacturing, and IT services.

A notable pattern is the diversity of industries represented, from healthcare and chemical manufacturing to specialized machinery and agricultural solutions. For example, Eléphant Vert focuses on sustainable agriculture, while KLUBB GROUP designs professional vehicles. This suggests a varied economic landscape in Seine-et-Marne, supporting different types of research and development activities.

#CompanyIndustryHeadquarters EmployeesFounded
1
Grand Hôpital de l'Est Francilienghef.fr

Integrated hospital network providing extensive medical and psychiatric care across multiple sites, serving the northern Seine-et-Marne population.

Government Administration 🇫🇷 Meaux 904 2017
2
ACRELECacrelec.com

Global technology company transforming customer experiences for restaurants and retail brands through innovative platforms that enhance engagement, efficiency, and operations globally

IT Services and IT Consulting 🇫🇷 Saint Thibault des Vignes 689 2004
3
Fives Maintenancefivesgroup.com

Specializing in industrial maintenance for over twenty years, offering tailored solutions to ensure high availability of production facilities with a focus on safety and environmental responsibility

Commercial and Industrial Machinery Maintenance 🇫🇷 Montévrain 495 1997
4
ENCRES DUBUITencresdubuit.com

Development and manufacturing of specialized inks for electronics, packaging, automotive, and industrial applications with environmental responsibility and innovation focus.

Chemical Manufacturing 🇫🇷 Mitry-Mory 330 1954
5
Fondation Ellen Poidatzfondationpoidatz.com

Management of pediatric rehabilitation centers, support for disabled children and adults, adapted schooling, and research in healthcare innovation.

Hospitals and Health Care 🇫🇷 Chailly-en-Bière 329 1919
6
Eléphant Vertelephant-vert.com

Develops and provides sustainable agricultural solutions, partnering with farmers to improve crop quality and harvest sustainability through innovative approaches.

Farming 🇫🇷 Serris 329 2012
7
KLUBB GROUPklubb.com

Designs and converts professional vehicles into business solutions for aerial work platforms, refueling, and roadside assistance, focusing on innovation and sustainability.

Industrial Machinery Manufacturing 🇫🇷 Ferrières-en-Brie 265 n/a
8
Techtronic Industries France - TTIttigroup.com

A global leader in power tools, accessories, outdoor equipment, and floor care, serving professionals and DIY enthusiasts with premium brands

Manufacturing 🇫🇷 Le Mesnil-Amelot 173 1989
9
SMC Francesmc.eu

Manufacture and supply of pneumatic automation components including actuators, valves, connectors, air treatment, vacuum and fluid products with personalized service.

Automation Machinery Manufacturing 🇫🇷 Bussy-Saint-Georges 164 1988
10
JACIRjacir.fr

With over 60 years of expertise, the company offers a diverse range of water cooling solutions, incorporating environmental requirements and providing dedicated services to clients worldwide

Mechanical Or Industrial Engineering 🇫🇷 Pontault-Combault 159 1959
11
AS INTERNATIONALas-inter.com

A global network offering quality solutions in textile, clothing, home, and leisure industries for manufacturers, brands, and distributors through expertise and innovation

Transportation, Logistics, Supply Chain and Storage 🇫🇷 Lieusaint 148 1983
12
SCHILLER Francemediprostore.com

Development, production, and distribution of medical devices for cardio-pulmonary diagnosis, patient monitoring, and emergency medicine in France.

Medical Equipment Manufacturing 🇫🇷 Bussy-Saint-Georges 143 1974
13
ADR - ALCENadr-alcen.com

Design and manufacture of high-precision ball bearings and integrated rotating systems for specialized industries including aeronautics, space, defense, medical, and energy.

Defense and Space Manufacturing 🇫🇷 Thomery 135 1925
14
STIHL Francestihl.fr

Design and manufacture of high-performance garden, forestry, and green space tools including chainsaws, trimmers, mowers, and blowers.

Machinery Manufacturing 🇫🇷 Torcy 127 1984
15
JPB SYSTEMEjpb-systeme.com

Design and manufacture of patented self-locking devices for aerospace applications, ensuring quality, customization, and easy removal with ratchets.

Aviation and Aerospace Component Manufacturing 🇫🇷 Montereau-sur-le-Jard 124 1995

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16
MULTIVAC Francemultivac.com

Global leader in providing packaging solutions for food, healthcare, and industrial products, offering a wide range of technologies, automation, and quality control systems

Machinery Manufacturing 🇫🇷 Bailly-Romainvilliers 103 1974
17
ITQ GROUPitqgroup.fr

French group specializing in security integration and maintenance services for public and private sectors, offering a range of solutions such as video surveillance and access control

Security and Investigations 🇫🇷 Serris 99 2011
18
AREALareal-topkapi.com

Develops SCADA software platform for monitoring automated processes in industry, environment, energy, building, infrastructure, and transport sectors, collaborating with partners globally.

Software Development 🇫🇷 Savigny-le-Temple 95 1989
19
MEIKO Francemeiko.com

Development of professional washing, cleaning, disinfection techniques, and sustainable biowaste treatment systems supporting exceptional performance and hygiene worldwide.

Machinery Manufacturing 🇫🇷 Collégien 92 1993
20
TAM GROUPEtamgroupe.fr

Specialist manufacturing and distribution of concrete construction products, supporting design, delivery, and installation across France with expert teams.

Construction 🇫🇷 Moissy-Cramayel 88 n/a
21
GT Companygtcompany.fr

This company engages in the creation, manufacturing, importing, storage, distribution, and delivery of various products

International Trade and Development 🇫🇷 Chessy 86 n/a
22
Cordiacordia.fr

Specialized manufacturer and distributor providing a wide range of fire safety equipment, including alarms, firefighting tools, gas detection, training materials, and innovative products

Wholesale 🇫🇷 Mitry-Mory 86 n/a
23
KOMPAN Francekompan.com

Design and provide custom playgrounds and free-access fitness areas to create engaging, inclusive public spaces for all ages.

Recreational Facilities 🇫🇷 Dammarie-les-Lys 82 1970
24
Aristidearistide.paris

Specializes in retail lighting solutions enhancing customer experience and maximizing sales through over 10 years of sensory marketing expertise.

Architecture and Planning 🇫🇷 Lieusaint 81 2004
25
GEZE Francegeze.fr

Specialist in door and window systems offering compliant, sustainable, accessible products including automatic doors, window motors, and maintenance services.

Wholesale Building Materials 🇫🇷 Servon 73 1978
26
GAINERIE 91 - Groupegainerie91.com

Specializing in handcrafted products for luxury brands, artisans at this company provide exceptional quality in leatherwork, woodwork, laquering, and more Customized designs meet client specifications

Packaging and Containers Manufacturing 🇫🇷 Lieusaint 73 1967
27
Beissier Francebeissier.fr

Designs, manufactures, and markets ready-to-use and powder plasters for painters, focusing on quality, customer support, and sustainability.

Wholesale Building Materials 🇫🇷 La Chapelle-la-Reine 71 1872
28
ALTRAD PLETTAC MEFRAN Échafaudagesaltradplettacmefran.fr

A leading provider in the construction and industrial sector, offering a wide range of scaffolding, safety equipment, and construction materials worldwide

Construction 🇫🇷 Roissy-en-Brie 65 1985
29
GEOSEC FRANCEgeosec.fr

Specializes in foundation soil consolidation using injection techniques combining research, technology, and innovation to ensure high-quality solutions.

Civil Engineering 🇫🇷 Saint-Thibault-des-Vignes 65 2011
30
CHAPSOLchapsol.fr

Providing intelligent, sustainable solutions for civil engineering, public works, rail infrastructure, building, and agricultural structures with innovative, tailored approaches.

Civil Engineering 🇫🇷 Coubert 64 1931

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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 14, 2026.

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