These companies are primarily IT services and consulting firms, with a strong presence in cybersecurity and software development. They range from large groups like SPIE France with over 9,800 employees to mid-sized companies such as adista and Hervé Schauer Consultants, each with several hundred employees. A notable concentration of activity is in providing comprehensive digital transformation, infrastructure management, and specialized security solutions.
Several companies, including Systancia and AMOSSYS, focus on cybersecurity, offering "zero-trust" platforms and IT security evaluations. Digora specializes in data management, while Mairistem provides digital solutions for local governments. The list also shows a mix of headquarters locations, with some based within the Grand Est region like adista (Maxéville) and Digora (Strasbourg), and others distributed across France.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
SPIE Francespie.fr
Global actor in energy, digital, and industrial transitions, offering concrete solutions for decarbonizing buildings, industries, and territories through various technical services. |
9,833 | |||
| 2 |
Astekastekgroup.fr
Supports clients with high-value service, deep technical expertise across technology, operations, and engineering, focusing on sustainable digital transformation with humans at the core. |
6,035 | |||
| 3 | 745 | ||||
| 4 |
Ekinopsekinops.com
Provides open, trusted, and innovative network connectivity solutions. Delivers high value-added software-driven solutions for optical transport and virtualized managed enterprise services. |
509 | |||
| 5 |
Hervé Schauer Consultants (HSC)hs2.fr
Provides information security consulting, audits, penetration tests, risk management, and training services to secure diverse infrastructures and systems. |
500 | |||
| 6 |
Hexanethexanet.fr
A Reims-based team of internet, network, and telecommunications professionals offering specialized services such as telecom, unified telephony, hosting, and more |
225 | |||
| 7 |
Mairistemjvs-mairistem.fr
JVS-Mairistem provides digital solutions for local governments, helping them streamline operations and enhance efficiency through modern and integrated systems |
209 | |||
| 8 |
Groupe ANTARES | Infogérance & Services Numériquesantares.fr
Providing IT managed services, infrastructure supervision, information system security, connectivity cabling, and multimedia solutions for private companies and public organizations across France. |
111 | |||
| 9 |
Systanciasystancia.com
Systancia provides a unique "zero-trust" platform for cybersecurity, combining IAM, PAM, and ZTNA to secure workforce access and compliance efficiently |
101 | |||
| 10 | 100 | ||||
| 11 |
Casteliscastelis.com
Develops custom software solutions for various sectors, including e-commerce, works councils, service companies, and general businesses, covering web technologies and database management. |
93 | |||
| 12 |
Trustteam Francetrustteam.fr
With nearly 60 years of experience, the company provides comprehensive IT solutions, specializing in design, deployment, and maintenance to meet clients' digital transformation needs |
92 | |||
| 13 | 64 | ||||
| 14 |
NXO Telecomnxo.eu
NXO Telecom, a subsidiary of NXO France group, specializes in digital integration and management for businesses, focusing on communication, collaboration, infrastructure, security, and services |
49 | |||
| 15 |
Kaspersky France and North, West & Central Africakaspersky.fr
This company offers international cybersecurity and digital privacy protection through advanced endpoint protection, security solutions, and services against evolving digital threats for businesses, infrastructure, and individuals. |
44 | |||
| 16 |
Lex Personagoodflag.com
A French software publisher and trust service provider specializing in probative dematerialization, offering secure electronic signature, sealing, and data protection solutions |
41 | |||
| 17 |
Reboot Conseilreboot-conseil.com
A unique consulting company focused on IT, new technologies, and engineering, with a culture centered on self-governance, authenticity, and evolving purpose Offering HR services, training, and product development |
40 | |||
| 18 |
IPGARDEipgarde.com
Provides enterprise-level international cloud hosting services and solutions for businesses from SMB to Fortune 500, ensuring high customer satisfaction for various applications. |
36 | |||
| 19 |
ANOZR WAYanozrway.com
French software editor providing a platform reducing human attack surface, protecting against cyber and fraud risks using automated, proprietary technology, GDPR compliant. |
26 | |||
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. | |||||
| 20 |
cyberelementscyberelements.io
A security platform ensuring organizations are protected from cyberattacks while maintaining workforce productivity through secure access and identity management solutions |
26 | |||
| 21 |
D2B Informatiqued2b.com
A distributor specializing in infrastructure solutions for data protection, data management, and cybersecurity, providing training and support to IT professionals for over 20 years |
24 | |||
| 22 |
APSecurityapsecurity.fr
A cybersecurity company in the Ardennes specializing in securing digital data for a diverse clientele through audits, personalized support, and comprehensive training programs |
17 | |||
| 23 |
Private Discussprivate-discuss.com
Offers a videoconferencing solution prioritizing user well-being, data privacy with French servers, and environmental impact through optimized development and tree planting. |
17 | |||
| 24 |
GS GROUPgs-group.fr
Specializing in security technologies and digitalization, this company focuses on innovation in the field of technology solutions |
17 | |||
| 25 |
IT CONSULTANT SERVICESitconsultant.fr
Specializing in Cloud Architecture & Security, IT Consultant Services helps clients migrate workloads to the cloud and design new delivery models with cloud technologies |
16 | |||
| 26 |
SFR Business Estsfrbusiness.fr
SFR Business Distribution is a national distributor of business solutions, offering a range of services from mobile to IoT, supporting growth and digital transformation |
16 | |||
| 27 |
Tracip by ChapsVisiontracip.fr
Specializing in data recovery and digital investigation, this company offers efficient solutions, expert advice, and training services in the field of cyber intelligence and cybersecurity |
15 | |||
| 28 |
Montimagemontimage.eu
Development of AI-powered cybersecurity solutions focusing on autonomous network security monitoring, threat detection, analysis, and incident response workflows. |
15 | |||
| 29 |
Le 16 Solutionsle16solutions.com
16Solutions provides B2B IT services since 1988, offering expertise in hardware, software, development, hosting, and more, with a focus on building long-lasting partnerships |
13 | |||
| 30 |
NIS GROUP FRANCEnis-group.fr
A professional consulting firm offering IT, telecommunications, and cybersecurity services with a focus on customer satisfaction, tailored solutions, and continuous training |
12 | |||
| 31 |
KIWI BACKUP - L'intelligence de la sauvegardekiwi-backup.com
A pioneer in outsourced backup, providing secure data storage solutions in French data centers for businesses of all sizes Offering tailored services and support |
11 | |||
| 32 |
LPB Conseillpb-conseil.com
Support IT and security leaders in digital transformation, cybersecurity risk management, and guiding business units towards effective digital usage and methods. |
11 | |||
| 33 |
AMI - Audit Management Intégrationami-gestion.fr
Offers a comprehensive solution unifying telephony, internet, cybersecurity, backup, cloud, and IT. Provides a single partner and invoice for these essential services. |
10 | |||
| 34 |
BonjourCyberbonjourcyber.com
BonjourCyber® offers a comprehensive cybersecurity service for small and medium-sized businesses, helping them reduce cyber risks through a 3-step process |
8 | |||
| 35 |
ID Protectidprotect.fr
Helps professionals verify document authenticity, optimize customer knowledge, and check for lost/stolen documents. Enables individuals to oppose identity document misuse, track usage, and securely exchange personal data. |
6 | |||
| 36 |
be ys Trusted Solutionskipmi.com
Delivers innovative, high-performing digital trust services, mastering digital identity, electronic signature, contracting, document sharing, registered mail, and probative archiving. |
6 | |||
| 37 |
Thalyoscyberpreventys.com
A digital services company specializing in developing, securing, and maintaining IT infrastructure while focusing on cybersecurity to make businesses cyber-resilient |
5 | |||
| 38 |
Science Edu Agencyagency.science-edu.fr
A family-owned company specializing in digital services and training, offering IT consulting and services to educational centers and businesses in Alsace and throughout France |
2 | |||
| 39 |
Eurocybersecuriteeurocybersecurite.fr
Eurocybersecurite specializes in digital security, offering customized solutions that meet standards and regulations Services include digital consulting, cybersecurity training, audits, and more |
2 | |||
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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.
More company lists in Grand Est
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The same list elsewhere in France
- Cybersecurity companies in France 958
- Cybersecurity companies in Île-de-France 525
- Cybersecurity companies in the Hauts-de-Seine department 154
- Cybersecurity companies in Auvergne-Rhône-Alpes 91
- Cybersecurity companies in Occitanie 49
- Cybersecurity companies in Provence-Alpes-Côte d'Azur 48
- Cybersecurity companies in the Rhône department 48
- Cybersecurity companies in Hauts-de-France 44
- Cybersecurity companies in Brittany 37
- Cybersecurity companies in the Bouches-du-Rhône department 36
- Cybersecurity companies in Nouvelle-Aquitaine 35
- Cybersecurity companies in the Nord department 30
- Cybersecurity companies in Pays de la Loire 28
- Cybersecurity companies in the Haute-Garonne department 27
- Cybersecurity companies in the Ille-et-Vilaine department 25
- Cybersecurity companies in the Yvelines department 25
- Cybersecurity companies in Paris 290