# 30 leading multinational companies in Grenoble
Tamtam tracks 47 multinational companies headquartered in Grenoble. This list ranks the 30 largest by number of employees on LinkedIn, led by Tessi, ARaymond and Grenoble Ecole de Management. Their median headcount is 126. Half of them were founded in 1994 or later.
These multinational companies in Grenoble are predominantly mid-sized to large organizations, with a strong presence in IT services, manufacturing, and research. Notable examples include Tessi, which manages customer relations and document processes, and ARaymond, a manufacturer of fastening and fluid connection systems. CEA-Leti focuses on micro- and nanotechnologies for industrial applications, while ESRF - The European Synchrotron is an international science facility for advanced research.
A significant pattern among these companies is their deep involvement in technology and scientific research, often with a global reach. This is evident in organizations like CORYS, a simulation company for various industries, and ILL - Institut Laue Langevin, which provides high flux neutrons for fundamental research. The presence of higher education institutions like Grenoble Ecole de Management and Grenoble INP - UGA further reinforces the city's focus on knowledge-intensive sectors.
๐ซ๐ท Grenoble ยท 30 companies ยท Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Tessi](https://www.tamtam.ai/c/tessi) (tessi.eu)
Management of customer relations, payments, and document processes through digitalization and business process outsourcing solutions, ensuring information security for businesses. | IT Services and IT Consulting | ๐ซ๐ท Grenoble | 3,960 | 1971 |
| 2 | [ARaymond](https://www.tamtam.ai/c/araymond) (araymond.com)
Design and manufacture of sustainable fastening, fluid connection, and integration systems for automotive, energy, healthcare, agriculture, and construction industries worldwide through collaborative innovation. | Manufacturing | ๐ซ๐ท Grenoble | 2,155 | 1865 |
| 3 | [Grenoble Ecole de Management](https://www.tamtam.ai/c/grenoble-ecole-de-management) (grenoble-em.com)
A leading business school offering a wide range of educational programs in French and English, focused on solving complex problems for business and society | Education Administration Programs | ๐ซ๐ท Grenoble | 1,595 | 1984 |
| 4 | [CEA-Leti](https://www.tamtam.ai/c/cea-leti) (leti-cea.com)
Development of micro- and nanotechnologies for smart, energy-efficient, and secure industrial applications including healthcare, energy, and digital sectors. | Semiconductor Manufacturing | ๐ซ๐ท Grenoble | 1,223 | 1967 |
| 5 | [ESRF - The European Synchrotron](https://www.tamtam.ai/c/esrf-the-european-synchrotron) (esrf.fr)
International science facility providing advanced synchrotron radiation for research in biology, medicine, chemistry, physics, and environmental sciences. | Research Services | ๐ซ๐ท Grenoble | 672 | 1994 |
| 6 | [CORYS](https://www.tamtam.ai/c/corys) (corys.com)
A leading French simulation company providing training and engineering simulators globally for transportation, power, and process industries | Software Development | ๐ซ๐ท Grenoble | 605 | 1989 |
| 7 | [ILL - Institut Laue Langevin](https://www.tamtam.ai/c/ill-institut-laue-langevin) (ill.eu)
Provides scientists with high flux neutrons and instruments for fundamental research in physics, chemistry, biology, materials, and nuclear science. | Research Services | ๐ซ๐ท Grenoble | 476 | 1967 |
| 8 | [MasterGrid](https://www.tamtam.ai/c/mastergrid) (mastergrid.com)
MasterGrid specializes in electrical system services from high to low voltage, providing tailored solutions to optimize system lifecycle and improve environmental impact | Electric Power Transmission, Control, and Distribution | ๐ซ๐ท Grenoble | 328 | 2019 |
| 9 | [ECM Technologies - Industrial Furnaces](https://www.tamtam.ai/c/ecm-technologies-industrial-furnaces) (ecm-furnaces.com)
Design and supply of vacuum, high-temperature, and thermochemical process machines and solutions for various industrial sectors worldwide. | Machinery Manufacturing | ๐ซ๐ท Grenoble | 326 | 1928 |
| 10 | [SPARTOO](https://www.tamtam.ai/c/spartoo) (spartoo.com)
Online retail platform offering extensive footwear and fashion products across Europe and China, with free delivery and returns service. | Technology, Information and Internet | ๐ซ๐ท Grenoble | 290 | 2006 |
| 11 | [Grenoble INP - UGA](https://www.tamtam.ai/c/grenoble-inp-uga) (grenoble-inp.fr)
Public higher education institution combining engineering schools, management programs, and research laboratories within the University Grenoble Alpes. | Higher Education | ๐ซ๐ท Grenoble | 287 | |
| 12 | [Laser Game Evolution](https://www.tamtam.ai/c/laser-game-evolution-grenoble) (lasergame-evolution.com)
provider of laser tag games offering individual and team play, with special corporate packages for events, seminars, and HR activities | Recreational Facilities | ๐ซ๐ท Grenoble | 224 | |
| 13 | [Grenoble INP - Ense3](https://www.tamtam.ai/c/grenoble-inp-ense3) (ense3.grenoble-inp.fr)
Educates engineers in electrical, mechanical, hydraulic, civil, and environmental fields, focusing on the energy chain and water cycle. | Higher Education | ๐ซ๐ท Grenoble | 182 | 2008 |
| 14 | [BASSETTI Group](https://www.tamtam.ai/c/bassetti-group) (bassetti-group.com)
A global leader in IT and consulting services specializing in Technical Expertise Managementยฎ software, serving over 100,000 users worldwide | Software Development | ๐ซ๐ท Grenoble | 138 | 1992 |
| 15 | [HAPIK](https://www.tamtam.ai/c/hapik) (hapik.fr)
Operates fun indoor climbing parks for all ages, offering sessions, parties, and team building challenges in retail parks and shopping centers, expanding internationally. | Sports and Recreation Instruction | ๐ซ๐ท Grenoble | 126 | 2016 |
| 16 | [Vates Virtualization Management Stack (XCP-ng / Xen Orchestra)](https://www.tamtam.ai/c/vates-virtualization-management-stack-xcp-ng-xen-orchestra) (vates.tech)
Development of XCP-ng, open source virtualization platform, and Xen Orchestra for management, backup, and cloud enablement, emphasizing flexibility and control with FOSS | Software Development | ๐ซ๐ท Grenoble | 114 | 2012 |
| 17 | [Renaissance Fusion](https://www.tamtam.ai/c/renaissance-fusion) (renfusion.eu)
Development of stellarator-based nuclear fusion technology aiming to simplify fusion processes, reduce electricity costs, and expand high temperature superconductor availability. | Nuclear Electric Power Generation | ๐ซ๐ท Grenoble | 104 | 2020 |
| 18 | [Quobly](https://www.tamtam.ai/c/quobly) (quobly.io)
A company in Grenoble, France is developing a universal quantum computer using semiconductor-industry processes to solve problems classical computers cannot | Computer Hardware Manufacturing | ๐ซ๐ท Grenoble | 103 | 2022 |
| 19 | [GROUPE MARE NOSTRUM](https://www.tamtam.ai/c/groupe-mare-nostrum) (mare-nostrum.eu)
With over 18 years of experience, our global human resources management group specializes in temporary work, recruitment, training, payroll services, and HR solutions | Human Resources Services | ๐ซ๐ท Grenoble | 98 | 2002 |
| 20 | [NAVER LABS Europe](https://www.tamtam.ai/c/naver-labs-europe) (europe.naverlabs.com)
Innovative R&D subsidiary advancing technology in AI, robotics, autonomous driving, 3D/HD mapping and AR to create connections between people, machines, and information | Research Services | ๐ซ๐ท Grenoble | 96 | 2017 |
| 21 | [Enerdata](https://www.tamtam.ai/c/enerdata) (enerdata.net)
An independent research company specializing in energy and climate analysis, offering forecasting, business intelligence, and policy assistance to clients worldwide | Business Consulting and Services | ๐ซ๐ท Grenoble | 95 | 1991 |
| 22 | [Reynolds and Reynolds France](https://www.tamtam.ai/c/reynolds-and-reynolds-france) (reyrey.fr)
A global leader in specialized ERP systems for automotive distribution, with solutions to enhance customer experience, productivity, and profitability for dealerships worldwide | Software Development | ๐ซ๐ท Grenoble | 91 | 1984 |
| 23 | [Diabeloop](https://www.tamtam.ai/c/diabeloop) (diabeloop.com)
Developing intelligent therapeutic systems for diabetes management, including the first automated insulin delivery device, available in multiple European countries | Medical Equipment Manufacturing | ๐ซ๐ท Grenoble | 81 | 2015 |
| 24 | [GEA - Grenobloise d'Electronique et d'Automatismes](https://www.tamtam.ai/c/gea-grenobloise-d-electronique-et-d-automatismes) (gea.fr)
A French company specializing in road toll collection systems, with a focus on automatic toll plazas, electronic toll collection, and integrated parking solutions | Truck Transportation | ๐ซ๐ท Grenoble | 80 | 1971 |
| 25 | [NEXUS/FRANCE](https://www.tamtam.ai/c/nexus-france) (nexus-france.fr)
Development of innovative digital software solutions for healthcare professionals and institutions to improve patient care and operational efficiency. | IT Services and IT Consulting | ๐ซ๐ท Grenoble | 68 | 1988 |
| 26 | [Zigotours](https://www.tamtam.ai/c/zigotours) (zigotours.com)
French travel agency. Offers trips and tours to various destinations, providing comprehensive travel services for clients. | Travel Arrangements | ๐ซ๐ท Grenoble | 53 | 1989 |
| 27 | [AET Group](https://www.tamtam.ai/c/aet-group) (aet.group)
Design and manufacture of thermal equipment for material development, transformation, characterization, and recycling in industry and research sectors. | Machinery Manufacturing | ๐ซ๐ท Grenoble | 52 | |
| 28 | [ALBERT & CO](https://www.tamtam.ai/c/albert-and-co) (albertandco.fr)
Specialist in procurement solutions for industrial clients, offering project management, consulting, and outsourcing services to achieve profitable and competitive purchases | Business Consulting and Services | ๐ซ๐ท Grenoble | 43 | 2015 |
| 29 | [BD Rowa France](https://www.tamtam.ai/c/bd-rowa-france) (bd.com)
The BD Rowaโข robot is a pharmacy automation solution, working tirelessly to support pharmacies with efficiency, accuracy, and round-the-clock service | Medical Equipment Manufacturing | ๐ซ๐ท Grenoble | 42 | |
| 30 | [eLichens](https://www.tamtam.ai/c/elichens) (elichens.com)
eLichens, founded in 2014, provides innovative air quality solutions using sensors and services for consumer electronics and industrial markets globally | Computers and Electronics Manufacturing | ๐ซ๐ท Grenoble | 39 | 2014 |
## 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 11, 2026.
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Source: https://www.tamtam.ai/l/multinational-companies-grenoble