These companies are primarily IT Services and IT Consulting firms located in the Val-d'Oise department. The list includes a mix of large groups and mid-sized companies, with a focus on digital transformation, enterprise solutions, and specialized IT support.
Eviden, with over 10,000 employees, is a global leader in digital, cloud, and security solutions. Worldgrid specializes in smart energy solutions for utilities, while Inmac wstore is a leading French supplier of IT hardware and software. Edifixio provides IT services to large international companies, and AJANS focuses on website creation and development. A notable pattern is the concentration of headquarters in Bezons and Roissy-en-France.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Evideneviden.com
Eviden is a global leader in digital transformation, offering expertise in digital, cloud, data, advanced computing, and security solutions to industries worldwide |
10,793 | |||
| 2 | 970 | ||||
| 3 |
Inmac wstoreinmac-wstore.com
Leading French supplier of computers, servers, and software providing high-volume procurement, daily hardware integration, and rapid logistics to corporate and public sector clients. |
659 | |||
| 4 |
Edifixioedifixio.com
Provides IT services to large international companies, specializing in Industry, Retail, Insurance, and Services sectors, with a global presence. |
192 | |||
| 5 | 175 | ||||
| 6 |
H-Tech Supportshtechsupports.com
Provides modern IT and network solutions, offering managed IT support, professional consulting, data solutions, and maintenance services to enterprise markets worldwide. |
107 | |||
| 7 |
SPIE Operationsspie.com
Provides multi-technical services in energy and communications sectors, supporting energy transition and digital transformation with diverse, committed teams. |
70 | |||
| 8 |
JL Consulting JLCjlconsulting.fr
Consulting firm specializing in ERP, CRM, and BI systems, focusing on employee well-being and long-term client partnerships. |
69 | |||
| 9 |
IMP360imp-360.com
Specialist in healthcare IT providing security evaluation, system integration, infrastructure management, medical imaging solutions, and continuity planning for clients. |
54 | |||
| 10 |
STEPHYAstephya.com
STEPHYA is a DATACENTER service center in France, offering IT relocation services across Europe with experienced consultants and highly skilled technicians |
50 | |||
| 11 |
Snapcomsnapcom.eu
Specializes in consulting, deploying, and optimizing unified communications, videoconferencing, audiovisual, and event solutions with expert services and training. |
43 | |||
| 12 |
INFODIPinfodip.com
A European IT company with 35 years' experience, offering customized solutions, appliances, service delivery, and support adhering to ISO 9001 standards |
35 | |||
| 13 | 35 | ||||
| 14 |
ARATICEaratice.fr
Specializing in digital equipment and multimedia solutions for education and communities, offering a range of products such as interactive screens, tablets, and WiFi coverage ISO 9001 certified since 2014 |
34 | |||
| 15 |
CINODIScinodis.fr
A experienced value added reseller specializing in telecommunication and video surveillance projects, with a team of IT specialists for complex tasks |
33 | |||
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 |
Techmatechmadev.com
Provider of services, turnkey supply, and technical assistance for industrial process control, automation, instrumentation, safety, SCADA, and telecoms for over 25 years |
33 | |||
| 17 | 33 | ||||
| 18 |
MIDRANGE Groupmidrange-group.com
Provides innovative, tailor-made digital services like IT support, AI, data, and IT asset disposition, focusing on sustainability and local economic commitment for businesses. |
28 | |||
| 19 |
WYSIWYGwysiwyg.fr
Provider of private clouds for professionals hosting IT systems and full office environments, offering ERP, CRM, business management tools, and production management solutions |
25 | |||
| 20 |
Big Data Consultinglinktr.ee
Big Data Consulting specializes in dematerializing and optimizing EDI flows and processes to enhance exchange automation and security between partners' ERPs |
24 | |||
| 21 |
SYDERALsyderal.fr
Syd茅ral specializes in installing and maintaining alarm transmission systems including elevator telealarms, technical telealarms, video surveillance, and access control |
24 | |||
| 22 |
ELICOM SAS - Groupe Teleos5emeavenue.fr
An IT and Telecom solutions integrator in Pierrelaye, France, providing expertise, technology solutions, and support to businesses for over 20 years |
18 | |||
| 23 |
IT-tudeit-tude.fr
IT-tude by Infodis is a consulting and integration company specializing in IT Service Management, Enterprise Service Management, and IT Asset Management solutions |
16 | |||
| 24 |
EDC NETWORKSedc-networks.fr
EDC Networks is a Digital Services Company specializing in Tertiary / Smart Buildings, Industrial, and Data Center environments, offering innovative infrastructure solutions |
12 | |||
| 25 |
Elan Hospitalityelan-hospitality.fr
Specializing in multimedia solutions for the hospitality and healthcare accommodation industry, offering services such as IPTV, WiFi networks, IP telephony, and mobile website design |
11 | |||
| 26 |
SOFT-INNOVATIONsoft-innovation.com
Specializes in Salesforce Industries integration, providing tailored digital transformation solutions across energy, telecom, insurance, and financial sectors. |
10 | |||
| 27 |
DISTRIMEDIAdistrimedia.fr
Founded in 1991, specializing in communication products, Distrimedia distributes brands such as Comtrol, Advantech, and BarnFind, offering quality, reliability, and technical expertise across Europe, North Africa, and the Middle East Delivery within 24-48 hours in Europe and fast service |
9 | |||
| 28 |
Octopeek part of Mazarsoctopeek.com
Consulting and training firm specializing in Big Data and Artificial Intelligence, aiming to democratize their use to enhance business performance and productivity |
9 | |||
| 29 |
Paradisiaparadisia.fr
Paradisia offers tailored technology solutions based on expertise in office supplies, communication, and IT, with a focus on quality advice and ongoing support |
9 | |||
| 30 |
Fenriskfenrisk.com
Fenrisk specializes in offensive cybersecurity and intrusion testing, offering security audits, training, and expertise in web technologies, UNIX & Windows ecosystems, and industrial infrastructures |
7 | |||
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 Val-d'Oise department
- The largest companies in the Val-d'Oise department 849
- Multinational companies in the Val-d'Oise department 128
- Companies with in-house R&D in the Val-d'Oise department 88
- Manufacturers in the Val-d'Oise department 85
- Hardware manufacturers in the Val-d'Oise department 70
- Distributors and wholesalers in the Val-d'Oise department 67
- Retail chains in the Val-d'Oise department 56
- Professional services firms in the Val-d'Oise department 44
- Family-owned companies in the Val-d'Oise department 42
- IT services companies in the Val-d'Oise department 42
- Transportation, Logistics, Supply Chain and Storage companies in the Val-d'Oise department 33
- Aerospace and defence companies in the Val-d'Oise department 31
- Public sector organisations in the Val-d'Oise department 30
- Construction companies in the Val-d'Oise department 29
- Wholesale companies in the Val-d'Oise department 29
- Healthcare providers in the Val-d'Oise department 27
- Industrial Machinery Manufacturing companies in the Val-d'Oise department 27
- Government Administration companies in the Val-d'Oise department 26
- Logistics companies in the Val-d'Oise department 25
The same list elsewhere in France
- IT Services and IT Consulting companies in France 4,943
- IT Services and IT Consulting companies in 脦le-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-Rh么ne-Alpes 455
- IT Services and IT Consulting companies in Provence-Alpes-C么te d'Azur 261
- IT Services and IT Consulting companies in Occitanie 259
- IT Services and IT Consulting companies in the Rh么ne 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-Rh么ne department 154
- IT Services and IT Consulting companies in the Haute-Garonne department 152
- IT Services and IT Consulting companies in the Yvelines department 118
- 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 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