# 30 leading IT Services and IT Consulting companies in the Val-d'Oise department
Tamtam tracks 38 IT Services and IT Consulting companies headquartered in the Val-d'Oise department. This list ranks the 30 largest by number of employees on LinkedIn, led by Eviden, Worldgrid and Inmac wstore. Their median headcount is 33. Half of them were founded in 2003 or later. The most common headquarters are Bezons (6), Roissy-en-France (5) and Cergy (3).
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.
馃嚝馃嚪 Val-d'Oise 路 30 companies 路 Updated Nov 12, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Eviden](https://www.tamtam.ai/c/eviden) (eviden.com)
Eviden is a global leader in digital transformation, offering expertise in digital, cloud, data, advanced computing, and security solutions to industries worldwide | IT Services and IT Consulting | 馃嚝馃嚪 Bezons | 10,793 | |
| 2 | [Worldgrid](https://www.tamtam.ai/c/worldgrid) (alten.com)
Specializing in smart energy solutions for utilities, we offer integration projects and real-time solutions across the power, water, oil & gas sectors | IT Services and IT Consulting | 馃嚝馃嚪 Bezons | 970 | 2009 |
| 3 | [Inmac wstore](https://www.tamtam.ai/c/inmac-wstore) (inmac-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. | IT Services and IT Consulting | 馃嚝馃嚪 Roissy-en-France | 659 | 1998 |
| 4 | [Edifixio](https://www.tamtam.ai/c/edifixio) (edifixio.com)
Provides IT services to large international companies, specializing in Industry, Retail, Insurance, and Services sectors, with a global presence. | IT Services and IT Consulting | 馃嚝馃嚪 Bezons | 192 | 2000 |
| 5 | [AJANS](https://www.tamtam.ai/c/ajans) (chk.me)
Specializing in creating and developing websites, as well as personalized stationery, this company partners with creative professionals to bring your projects to life | IT Services and IT Consulting | 馃嚝馃嚪 Montigny-l猫s-Cormeilles | 175 | 2009 |
| 6 | [H-Tech Supports](https://www.tamtam.ai/c/h-tech-supports) (htechsupports.com)
Provides modern IT and network solutions, offering managed IT support, professional consulting, data solutions, and maintenance services to enterprise markets worldwide. | IT Services and IT Consulting | 馃嚝馃嚪 Saint-Leu-la-For锚t | 107 | 2016 |
| 7 | [SPIE Operations](https://www.tamtam.ai/c/spie-operations) (spie.com)
Provides multi-technical services in energy and communications sectors, supporting energy transition and digital transformation with diverse, committed teams. | IT Services and IT Consulting | 馃嚝馃嚪 Cergy | 70 | |
| 8 | [JL Consulting JLC](https://www.tamtam.ai/c/jl-consulting-jlc) (jlconsulting.fr)
Consulting firm specializing in ERP, CRM, and BI systems, focusing on employee well-being and long-term client partnerships. | IT Services and IT Consulting | 馃嚝馃嚪 Ermont | 69 | 2004 |
| 9 | [IMP360](https://www.tamtam.ai/c/imp360) (imp-360.com)
Specialist in healthcare IT providing security evaluation, system integration, infrastructure management, medical imaging solutions, and continuity planning for clients. | IT Services and IT Consulting | 馃嚝馃嚪 Roissy-en-France | 54 | 1997 |
| 10 | [STEPHYA](https://www.tamtam.ai/c/stephya) (stephya.com)
STEPHYA is a DATACENTER service center in France, offering IT relocation services across Europe with experienced consultants and highly skilled technicians | IT Services and IT Consulting | 馃嚝馃嚪 Montmorency | 50 | 1999 |
| 11 | [Snapcom](https://www.tamtam.ai/c/snapcom) (snapcom.eu)
Specializes in consulting, deploying, and optimizing unified communications, videoconferencing, audiovisual, and event solutions with expert services and training. | IT Services and IT Consulting | 馃嚝馃嚪 Bezons | 43 | 2005 |
| 12 | [INFODIP](https://www.tamtam.ai/c/infodip) (infodip.com)
A European IT company with 35 years' experience, offering customized solutions, appliances, service delivery, and support adhering to ISO 9001 standards | IT Services and IT Consulting | 馃嚝馃嚪 Saint-Leu-la-For锚t | 35 | 1986 |
| 13 | [Add-On](https://www.tamtam.ai/c/add-on) (addon.fr)
A company that provides hosting, operating, and cloud services, offering tailored support for virtualization projects and IT infrastructure consolidation Contact for specialized IT expertise | IT Services and IT Consulting | 馃嚝馃嚪 Vigny | 35 | 1999 |
| 14 | [ARATICE](https://www.tamtam.ai/c/aratice) (aratice.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 | IT Services and IT Consulting | 馃嚝馃嚪 Saint-Ouen-l'Aum么ne | 34 | 2010 |
| 15 | [CINODIS](https://www.tamtam.ai/c/cinodis) (cinodis.fr)
A experienced value added reseller specializing in telecommunication and video surveillance projects, with a team of IT specialists for complex tasks | IT Services and IT Consulting | 馃嚝馃嚪 Roissy-en-France | 33 | 2005 |
| 16 | [Techma](https://www.tamtam.ai/c/techma) (techmadev.com)
Provider of services, turnkey supply, and technical assistance for industrial process control, automation, instrumentation, safety, SCADA, and telecoms for over 25 years | IT Services and IT Consulting | 馃嚝馃嚪 Cergy | 33 | 1994 |
| 17 | [VNB-IT](https://www.tamtam.ai/c/vnb-it) (vnb-it.fr)
Delivering specialized maintenance, network security installation, and professional surveillance systems alongside comprehensive development of web applications, mobile apps, and business websites for digital growth. | IT Services and IT Consulting | 馃嚝馃嚪 Pontoise | 33 | 2022 |
| 18 | [MIDRANGE Group](https://www.tamtam.ai/c/midrange-group) (midrange-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. | IT Services and IT Consulting | 馃嚝馃嚪 Saint-Ouen-l'Aum么ne | 28 | 1993 |
| 19 | [WYSIWYG](https://www.tamtam.ai/c/wysiwyg) (wysiwyg.fr)
Provider of private clouds for professionals hosting IT systems and full office environments, offering ERP, CRM, business management tools, and production management solutions | IT Services and IT Consulting | 馃嚝馃嚪 Cergy | 25 | 1999 |
| 20 | [Big Data Consulting](https://www.tamtam.ai/c/big-data-consulting) (linktr.ee)
Big Data Consulting specializes in dematerializing and optimizing EDI flows and processes to enhance exchange automation and security between partners' ERPs | IT Services and IT Consulting | 馃嚝馃嚪 Garges-l猫s-Gonesse | 24 | 2005 |
| 21 | [SYDERAL](https://www.tamtam.ai/c/syderal) (syderal.fr)
Syd茅ral specializes in installing and maintaining alarm transmission systems including elevator telealarms, technical telealarms, video surveillance, and access control | IT Services and IT Consulting | 馃嚝馃嚪 Argenteuil | 24 | 1989 |
| 22 | [ELICOM SAS - Groupe Teleos](https://www.tamtam.ai/c/elicom-sas-groupe-teleos) (5emeavenue.fr)
An IT and Telecom solutions integrator in Pierrelaye, France, providing expertise, technology solutions, and support to businesses for over 20 years | IT Services and IT Consulting | 馃嚝馃嚪 Saint-Ouen-l'Aum么ne | 18 | 1988 |
| 23 | [IT-tude](https://www.tamtam.ai/c/it-tude) (it-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 | IT Services and IT Consulting | 馃嚝馃嚪 Roissy-en-France | 16 | 2014 |
| 24 | [EDC NETWORKS](https://www.tamtam.ai/c/edc-networks) (edc-networks.fr)
EDC Networks is a Digital Services Company specializing in Tertiary / Smart Buildings, Industrial, and Data Center environments, offering innovative infrastructure solutions | IT Services and IT Consulting | 馃嚝馃嚪 Bezons | 12 | 2017 |
| 25 | [Elan Hospitality](https://www.tamtam.ai/c/elan-hospitality) (elan-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 | IT Services and IT Consulting | 馃嚝馃嚪 Franconville | 11 | 2002 |
| 26 | [SOFT-INNOVATION](https://www.tamtam.ai/c/soft-innovation) (soft-innovation.com)
Specializes in Salesforce Industries integration, providing tailored digital transformation solutions across energy, telecom, insurance, and financial sectors. | IT Services and IT Consulting | 馃嚝馃嚪 Bezons | 10 | 2017 |
| 27 | [DISTRIMEDIA](https://www.tamtam.ai/c/distrimedia) (distrimedia.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 | IT Services and IT Consulting | 馃嚝馃嚪 Le Plessis Bouchard | 9 | 1991 |
| 28 | [Octopeek part of Mazars](https://www.tamtam.ai/c/octopeek-part-of-mazars) (octopeek.com)
Consulting and training firm specializing in Big Data and Artificial Intelligence, aiming to democratize their use to enhance business performance and productivity | IT Services and IT Consulting | 馃嚝馃嚪 Enghien-les-Bains | 9 | 2010 |
| 29 | [Paradisia](https://www.tamtam.ai/c/paradisia) (paradisia.fr)
Paradisia offers tailored technology solutions based on expertise in office supplies, communication, and IT, with a focus on quality advice and ongoing support | IT Services and IT Consulting | 馃嚝馃嚪 Roissy-en-France | 9 | 2003 |
| 30 | [Fenrisk](https://www.tamtam.ai/c/fenrisk) (fenrisk.com)
Fenrisk specializes in offensive cybersecurity and intrusion testing, offering security audits, training, and expertise in web technologies, UNIX & Windows ecosystems, and industrial infrastructures | IT Services and IT Consulting | 馃嚝馃嚪 Ermont | 7 | |
## 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
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- [Distributors and wholesalers in the Val-d'Oise department](https://www.tamtam.ai/l/distributors-and-wholesalers-val-doise) (67)
- [Retail chains in the Val-d'Oise department](https://www.tamtam.ai/l/retail-chains-val-doise) (56)
- [Professional services firms in the Val-d'Oise department](https://www.tamtam.ai/l/professional-services-firms-val-doise) (44)
- [Family-owned companies in the Val-d'Oise department](https://www.tamtam.ai/l/family-owned-companies-val-doise) (42)
- [IT services companies in the Val-d'Oise department](https://www.tamtam.ai/l/it-services-companies-val-doise) (42)
- [Transportation, Logistics, Supply Chain and Storage companies in the Val-d'Oise department](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-val-doise) (33)
- [Aerospace and defence companies in the Val-d'Oise department](https://www.tamtam.ai/l/aerospace-and-defense-companies-val-doise) (31)
- [Public sector organisations in the Val-d'Oise department](https://www.tamtam.ai/l/public-sector-organisations-val-doise) (30)
- [Construction companies in the Val-d'Oise department](https://www.tamtam.ai/l/construction-companies-val-doise) (29)
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- [Healthcare providers in the Val-d'Oise department](https://www.tamtam.ai/l/healthcare-providers-val-doise) (27)
- [Industrial Machinery Manufacturing companies in the Val-d'Oise department](https://www.tamtam.ai/l/industrial-machinery-manufacturing-companies-val-doise) (27)
- [Government Administration companies in the Val-d'Oise department](https://www.tamtam.ai/l/government-administration-companies-val-doise) (26)
- [Logistics companies in the Val-d'Oise department](https://www.tamtam.ai/l/logistics-companies-val-doise) (25)
## The same list elsewhere in France
- [IT Services and IT Consulting companies in France](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-france) (4,943)
- [IT Services and IT Consulting companies in 脦le-de-France](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-ile-de-france) (2,776)
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- [IT Services and IT Consulting companies in Europe](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-in-europe) (11,705)
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Source: https://www.tamtam.ai/l/it-services-and-it-consulting-companies-val-doise