The companies presented here are IT services firms in Seine-Saint-Denis, mostly mid-sized with headcounts ranging from 88 to 801 employees. These companies specialize in various aspects of digital transformation and technology. For instance, e.SNCF Solutions provides cybersecurity and AI solutions for the SNCF Group, while Solutions30 France offers IT and telecom services to individuals and businesses. ARKANCE focuses on digital transformation for architecture, engineering, construction, and manufacturing.
A significant concentration of these companies is headquartered in Saint-Denis, including CORELIA, which correlates data for clients, and LINKBYNET, which provides outsourcing and cloud computing solutions. Other companies like ekino in Pantin specialize in technology and artificial intelligence, and Cantor in Neuilly-Plaisance focuses on software and data engineering.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
e.SNCF Solutionslinkedin.com
Digital factory supporting SNCF Group with cybersecurity, digital workplace, connectivity, application development, data, AI, and innovation labs. |
801 | |||
| 2 |
Solutions30 Francesolutions30.com
The company provides technological solutions to individuals and businesses in Europe in areas such as IT, telecom, energy, connected devices, security, and facility management |
695 | |||
| 3 |
ARKANCEarkance.world
Provides digital transformation solutions and expert services for architecture, engineering, construction, and manufacturing industries, optimizing design, build, and manufacturing processes. |
679 | |||
| 4 | 645 | ||||
| 5 |
CORELIAcorelia.ai
CORELIA correlates data for clients, blending expertise with project complexity through IT and business alignment, emphasizing data's importance in all projects |
402 | |||
| 6 | 328 | ||||
| 7 | 250 | ||||
| 8 | 202 | ||||
| 9 |
INTERCOM Technologiesintercom-technologies.fr
Specialized in high-value project expertise and management, supporting strategy, providing expert assistance, and operating nearshore agency for quality and growth. |
197 | |||
| 10 |
LINKBYNETaccenture.com
A innovative company providing outsourcing and cloud computing solutions, focusing on digital infrastructure development, management, and security for business transformation |
196 | |||
| 11 |
Calliope Business Solutions by TVH Consultinggroupe-calliope.com
Provides digital transformation through Microsoft and Sage ERP and CRM integration, utilizing packaged modules and structured methodology for retail, manufacturing, and services. |
150 | |||
| 12 |
EURO.TVS - TRAITEMENT VALEURS SERVICESeurotvs.fr
Specializes in document processing, image-to-file conversion, real-time data integration, and secure physical or digital archiving with certified quality and environmental standards. |
125 | |||
| 13 |
Compagnie Francaise Informatiquecfigroupe.com
A French leader in IT distribution and services for medium and large enterprises, evolving into a business solutions integrator with flexible payment options |
117 | |||
| 14 |
PI Servicespiservices.fr
Specialized in Microsoft enterprise platforms, providing digital transformation, infrastructure management, project handling, and innovation-driven IT services across regions. |
91 | |||
| 15 |
SQUIRELsquirel.fr
Specializing in rail sector IT systems, SQUIREL provides tailored solutions to operational and commercial challenges, enhancing client capabilities and competitiveness through experience-driven support |
88 | |||
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 |
ITNI S.A.Sitiltd.co.uk
Engineering, manufacturing, and installation of complex systems for networks, telecommunications, data centers, security, and access control. |
86 | |||
| 17 |
GLOBAL PARTNERglobal-partner.fr
Audit, optimize, and manage telecommunication and printing solutions, combining negotiation, consulting, and technical expertise for best user experience. |
76 | |||
| 18 |
TRIGONE (part of the NRB Group)trigone.fr
Provision of secure remote IT production continuity services across various platforms, supporting companies from large corporations to SMEs. |
71 | |||
| 19 |
PARTELYA CONSULTINGpartelya.com
Specialized consulting services for electronic payments, banking, and project management, focusing on front and back office operations, card manufacturing, and fraud prevention. |
65 | |||
| 20 |
Groupe SI BUREAUTIQUE FRANCEsibureautique.com
Established in 2005, a group of entities offering tailored solutions in printing, telephony, IT, and digital services to improve workplace efficiency |
64 | |||
| 21 |
SoftwareOne Francesoftwareone.com
Global provider of software and cloud solutions, specializing in license lifecycle management, migration, modernization, and digital transformation support. |
60 | |||
| 22 |
SARDEL Conseilsardel.fr
Identifies young talent, provides specialized mainframe technology training, and facilitates placement into prestigious organizations to ensure sustainable long-term employment for computer science graduates. |
54 | |||
| 23 | 53 | ||||
| 24 |
InnovQubeinnovqube.com
Consulting and SaaS solutions specializing in cloud strategy, architecture optimization, security, automation, training, and digital transformation for businesses. |
51 | |||
| 25 |
Ingenium animalisingenium.fr
French leader in pet data, collecting, processing, and analyzing information for over 40 million animals, ensuring their safety, health, and protection. |
51 | |||
| 26 |
Zenconnectzenconnect.fr
Network infrastructure integrator providing WiFi and Cloud solutions for business mobility, security, and quality of service through specialized technical support and services. |
48 | |||
| 27 | 45 | ||||
| 28 |
au carr茅aucarre.tech
Development of custom no-code digital solutions to simplify internal processes, automate emails, improve client communication, and foster community engagement. |
40 | |||
| 29 |
AMBIENT IT - Academyambient-it.net
Specialized consulting and training in new technologies including software development, DevOps, graphic design, and business intelligence solutions. |
39 | |||
| 30 |
Resadiaresadia.com
Network of regional businesses providing customized converged IP solutions including IT services, telecommunications, security, and hardware installation for companies of all sizes. |
38 | |||
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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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