This selection of consulting firms in Yvelines includes both large established groups and mid-sized companies, with a strong prevalence of IT services and IT consulting. SOCOTEC provides services for the entire life cycle of built assets, while LGM specializes in technological and digital engineering consulting. Konica Minolta Business Solutions France offers digital transformation solutions, and HexaWare provides tailored IT solutions and support.
A notable pattern is the concentration of headquarters in specific towns. Versailles hosts several of these companies, including HexaWare, GROUPE LR TECHNOLOGIES, act digital EMEA - Alter Solutions, STORDATA, and SOFYNE. Guyancourt is also a significant hub, home to SOCOTEC and Egis en France.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
SOCOTECsocotec.fr
Provides services throughout the entire life cycle of built assets for compliance, extended lifespan, improved performance, and people鈥檚 safety in construction, infrastructure, and industry. |
7,326 | |||
| 2 | 1,469 | ||||
| 3 |
Konica Minolta Business Solutions Francekonicaminolta.fr
Providing digital transformation solutions including imaging, cloud storage, IT services, and healthcare solutions Specializing in printing, AI technology, and eco-friendly initiatives |
1,148 | |||
| 4 |
HexaWarehexaware.net
HexaWare offers tailored IT solutions and support to ensure continuity of your computer systems and constant access to your data |
487 | |||
| 5 |
GROUPE LR TECHNOLOGIESlrtechnologies.fr
Provides human-centered engineering services, focusing on well-being, CSR, skills development, and recognition across various technology sectors like AI, cybersecurity, and critical software. |
397 | |||
| 6 |
Saphir Groupquariq.com
Provides Industry 4.0 solutions, industrial automation, MES/MOM, PLM, data and AI, OT security for manufacturers, from strategy to execution globally. |
380 | |||
| 7 |
Egis en Franceegis-group.com
International consulting, construction engineering, and mobility services company. Designs and operates smart infrastructure and buildings addressing climate challenges for balanced and sustainable territorial development. |
349 | |||
| 8 |
act digital EMEA - Alter Solutionsactdigital.com
AI-first multinational technology company providing customized, scalable solutions with local agility and global expertise to create business value. |
284 | |||
| 9 |
Cegedim Outsourcingcegedim-outsourcing.fr
Specializes in IT and BPO services with strong technological partnerships, providing high-level technical expertise and independent consulting. |
230 | |||
| 10 |
TVH Consultingtvhconsulting.fr
An international software company specializing in ERP solutions, systems integration, and industry-specific solutions for various verticals globally |
221 | |||
| 11 |
STORDATAstordata.fr
Specializing in data management, STORDATA offers consulting, architecture, implementation, and support services, focusing on storage, backup, archiving, and virtualization solutions for clients' success |
177 | |||
| 12 |
SOFYNEsofynetech.com
Specialized IT services company in MES/MOM and PLM domains, providing solutions for industry challenges through Industry 40 principles and ISO27001 certification |
174 | |||
| 13 |
EXPERTIMEexpertime.com
Digital performance partner focusing on user experience, offering expertise in collaborative tools, e-commerce, BI, digital communication, and more Specializing in strategy, design, and development services |
149 | |||
| 14 |
Digital Product Simulationdps-fr.com
Specializes in integrating simulation and analysis into industrial product design, offering consulting, training, and software development services worldwide. |
149 | |||
| 15 |
Euriwareeuriware.fr
A digital services company with 20 years of experience in demanding sectors like energy, industry, and defense, providing consulting, integration, and support services |
136 | |||
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 |
Groupe Rouge Vifgrouperougevif.fr
Advises on communication strategies, public and private territorial projects, and organizes events, focusing on human recognition and shared understanding across channels. |
114 | |||
| 17 |
BETOM Ing茅nierie (BETOM Group)betom-ingenierie.fr
Providing comprehensive technical engineering services including preliminary studies, design, project monitoring, and future building maintenance anticipation for clients. |
106 | |||
| 18 |
Energie & Serviceenergieetservice.fr
Specialized independent engineering firm providing HVAC consultancy, energy audits, technical project management, and contract monitoring for public and private building energy efficiency projects. |
103 | |||
| 19 |
NAMIXISnamixis.net
A consulting company specializing in optimizing building systems such as elevators, escalators, automatic doors, heating, cooling, and fire safety systems |
81 | |||
| 20 | 
KBU Conseil - Syst猫mes d'Information du Secteur Publickbuconseil.com
A company founded by an experienced DSI specializing in digital transformation for local public sector, providing pragmatic consulting services to various organizations |
71 | |||
| 21 |
VAGANETvaganet.fr
Pioneering agile delivery company specializing in digital transformation, technical expertise, innovation, and advisory services for IT projects Great Place to Work award winner |
69 | |||
| 22 |
Groupe Osmoziumosmozium.com
Specializes in managing heterogeneous IT infrastructures and delivering tailored outsourcing solutions for large corporate clients with high-quality, reliable services. |
59 | |||
| 23 |
BETOM Groupbetom-group.com
The company offers a wide range of services in construction and urban planning, from initial design to integration of building usage, focusing on sustainability and environmental management |
56 | |||
| 24 |
EURODECISION - Groupe DecideOmeurodecision.com
Specializing in business analytics, EURODECISION helps teams make optimal decisions by analyzing data and offering customized solutions using mathematical algorithms and AI |
50 | |||
| 25 |
Caplogycaplogy.com
Specializing in R&D, technology, scientific services, and education, the company drives innovation with expert teams to advance future technologies and provide high-level training. |
47 | |||
| 26 |
MTI France SASfr.mti.com
Provides tailored IT solutions and services in datacentre, security, and managed services with global experience and industry best practices. |
35 | |||
| 27 |
Soft Controlsoft-control.fr
This company supports industries with automation, industrial IT, and electrotechnical equipment integration, ensuring technical performance and continuous improvement for installations across various sectors. |
30 | |||
| 28 |
EITA Consultingeitaconsulting.fr
Specialists in digital transformation projects, covering data, AI, cloud, cybersecurity, and various programming languages, providing agile, industrial-grade solutions to clients. |
28 | |||
| 29 |
SET-WAYset-way.com
human-sized engineering consulting firm providing reliable, creative, and attentive support to industrial clients in complex environments for studies, design, R&D, and operational performance. |
26 | |||
| 30 |
MediTech Accessmeditechaccess.com
specialized in market access for medical devices, in vitro diagnostic devices, and other health technologies like telemedicine in Europe. |
26 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 Yvelines department
- The largest companies in the Yvelines department 1,469
- Multinational companies in the Yvelines department 226
- Companies with in-house R&D in the Yvelines department 160
- IT services companies in the Yvelines department 121
- IT Services and IT Consulting companies in the Yvelines department 118
- Manufacturers in the Yvelines department 109
- Professional services firms in the Yvelines department 108
- Hardware manufacturers in the Yvelines department 106
- Distributors and wholesalers in the Yvelines department 91
- Retail chains in the Yvelines department 89
- Aerospace and defence companies in the Yvelines department 65
- Public sector organisations in the Yvelines department 65
- Software Development companies in the Yvelines department 56
- Business Consulting and Services companies in the Yvelines department 53
- Government Administration companies in the Yvelines department 51
- Construction companies in the Yvelines department 50
- Automotive manufacturers and suppliers in the Yvelines department 49
- Motor Vehicle Manufacturing companies in the Yvelines department 49
- SaaS companies in the Yvelines department 49
- Education providers in the Yvelines department 46
- Industrial Machinery Manufacturing companies in the Yvelines department 43
- Critical infrastructure operators in the Yvelines department 41
- Family-owned companies in the Yvelines department 36
- Environmental services companies in the Yvelines department 35
The same list elsewhere in France
- Consulting firms in France 4,251
- Consulting firms in 脦le-de-France 2,408
- Consulting firms in the Hauts-de-Seine department 563
- Consulting firms in Auvergne-Rh么ne-Alpes 412
- Consulting firms in the Rh么ne department 242
- Consulting firms in Occitanie 236
- Consulting firms in Provence-Alpes-C么te d'Azur 233
- Consulting firms in Nouvelle-Aquitaine 166
- Consulting firms in Grand Est 165
- Consulting firms in Hauts-de-France 161
- Consulting firms in Pays de la Loire 160
- Consulting firms in the Haute-Garonne department 145
- Consulting firms in the Bouches-du-Rh么ne department 129
- Consulting firms in the Nord department 115
- Consulting firms in Brittany 99
- Consulting firms in the Loire-Atlantique department 94
- Consulting firms in the Gironde department 82
- Consulting firms in the Is猫re department 57
- Consulting firms in Paris 1,532
- Consulting firms in Lyon 163
- Consulting firms in Toulouse 98
- Consulting firms in Boulogne-Billancourt 88
- Consulting firms in Levallois-Perret 83
- Consulting firms in Neuilly-sur-Seine 73