The Yvelines department hosts a concentration of IT services and consulting firms, ranging from large corporate divisions to established mid-sized companies and younger ventures. These entities cover a broad spectrum of digital solutions, from core IT infrastructure to advanced technologies like AI and cybersecurity. Many of the companies focus on supporting digital transformation for various industries.
Notable companies include Crédit Agricole Group Infrastructure Platform, developing digital platforms; Konica Minolta Business Solutions France, offering digital transformation solutions; HexaWare, providing tailored IT solutions and support; and GROUPE LR TECHNOLOGIES, which focuses on human-centered engineering services. A common theme is the provision of comprehensive IT support, data management, and digital strategy for their clients.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Crédit Agricole Group Infrastructure Platformca-groupinfrastructureplatform.fr
Becoming a leading technology hub, developing new digital platforms, ensuring high security and confidentiality, positively impacting 54 million people. |
2,035 | |||
| 2 |
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 | |||
| 3 |
HexaWarehexaware.net
HexaWare offers tailored IT solutions and support to ensure continuity of your computer systems and constant access to your data |
487 | |||
| 4 |
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 | |||
| 5 |
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 | |||
| 6 | 378 | ||||
| 7 |
COLAS DIGITAL SOLUTIONScolasdigitalsolutions.com
Drives global IT and digital transformation projects for construction and transport infrastructure. Manages data centers, applications, IoT, Cloud, Big Data, and AI. |
377 | |||
| 8 |
Airbus Defence and Space Cybercyber.airbus.com
Designing, developing, integrating, and deploying reliable cyber security solutions for defense, governmental, and institutional customers, leveraging 30 years of expertise. |
308 | |||
| 9 |
BOUYGUES CONSTRUCTION ITbouygues-construction.fr
Based in Guyancourt, France, provides information technology and services. This company focuses on delivering IT solutions for various needs. |
307 | |||
| 10 |
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 | |||
| 11 |
Cegedim Outsourcingcegedim-outsourcing.fr
Specializes in IT and BPO services with strong technological partnerships, providing high-level technical expertise and independent consulting. |
230 | |||
| 12 |
TVH Consultingtvhconsulting.fr
An international software company specializing in ERP solutions, systems integration, and industry-specific solutions for various verticals globally |
221 | |||
| 13 |
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 | |||
| 14 |
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 | |||
| 15 |
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 | |||
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 |
Digital Product Simulationdps-fr.com
Specializes in integrating simulation and analysis into industrial product design, offering consulting, training, and software development services worldwide. |
149 | |||
| 17 |
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 | |||
| 18 |
GROUPE ROS DIGITALrosdigital.fr
A comprehensive group offering printing solutions, IT services, cloud storage, telecom solutions, communication products, and LED lighting expertise with dedicated specialists in each field |
136 | |||
| 19 |
NOVATEL IT Groupnovatel-it.com
Provides telecommunications, IT, and engineering services including network deployment, engineering, IT services, and product distribution across MEA region. |
109 | |||
| 20 |
NowBrainsnowbrains.com
Specializing in digital transformation and IT expertise for small and medium-sized enterprises, offering services in IT infrastructure, cybersecurity, digital strategy, and more Helping businesses accelerate their potential |
105 | |||
| 21 |
CA-SILCA
IT production services for Groupe Crédit Agricole, including infrastructure management, cloud solutions, big data, SOC operations, and user services |
83 | |||
| 22 |
Inibar Servicesinibar.com
Comprehensive support and solutions for evolving Point of Sale and Property Management System needs across various industries and businesses. |
79 | |||
| 23 |
Bluelineabluelinea.com
Bluelinea provides innovative solutions and services to support elderly and disabled individuals at home or in healthcare facilities |
77 | |||
| 24 |
Tersediatersedia.fr
Provider of IT solutions specializing in global infrastructure distribution, storage, business continuity, and virtualized infrastructure, offering expertise and personalized service |
75 | |||
| 25 | 
KBU Conseil - Systèmes 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 | |||
| 26 |
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 | |||
| 27 |
MONETIKmonetik.fr
Specializes in cash management solutions including analysis, installation, training, and maintenance to optimize time and costs for clients. |
62 | |||
| 28 |
Groupe Osmoziumosmozium.com
Specializes in managing heterogeneous IT infrastructures and delivering tailored outsourcing solutions for large corporate clients with high-quality, reliable services. |
59 | |||
| 29 |
NowTeamnowteam.net
National IT service partner for SMEs, offering solutions such as IT management, hosting, and system integration to free businesses from IT constraints |
54 | |||
| 30 | 51 | ||||
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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
- 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
- Consulting firms in the Yvelines department 72
- 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
- IT Services and IT Consulting companies in France 4,943
- IT Services and IT Consulting companies in Île-de-France 2,776
- IT Services and IT Consulting companies in the Hauts-de-Seine department 706
- IT Services and IT Consulting companies in Auvergne-Rhône-Alpes 455
- IT Services and IT Consulting companies in Provence-Alpes-Côte d'Azur 261
- IT Services and IT Consulting companies in Occitanie 259
- IT Services and IT Consulting companies in the Rhône department 253
- IT Services and IT Consulting companies in Hauts-de-France 226
- IT Services and IT Consulting companies in Grand Est 213
- IT Services and IT Consulting companies in Nouvelle-Aquitaine 190
- IT Services and IT Consulting companies in the Nord department 169
- IT Services and IT Consulting companies in Pays de la Loire 167
- IT Services and IT Consulting companies in the Bouches-du-Rhône department 154
- IT Services and IT Consulting companies in the Haute-Garonne department 152
- IT Services and IT Consulting companies in the Val-de-Marne department 113
- IT Services and IT Consulting companies in the Loire-Atlantique department 110
- IT Services and IT Consulting companies in the Gironde department 105
- IT Services and IT Consulting companies in Brittany 101
- IT Services and IT Consulting companies in the Seine-Saint-Denis department 78
- IT Services and IT Consulting companies in Paris 1,547
- IT Services and IT Consulting companies in Lyon 160
- IT Services and IT Consulting companies in Boulogne-Billancourt 105
- IT Services and IT Consulting companies in Toulouse 103
- IT Services and IT Consulting companies in Levallois-Perret 81