# List of cybersecurity companies in Grand Est

Tamtam tracks 40 cybersecurity companies headquartered in Grand Est. This list ranks the 39 largest by number of employees on LinkedIn, led by SPIE France, Astek and adista. Their median headcount is 26. Half of them were founded in 2002 or later. The most common headquarters are Strasbourg (5).

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.

🇫🇷 Grand Est · 39 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [SPIE France](https://www.tamtam.ai/c/spie-france) (spie.fr)<br>Global actor in energy, digital, and industrial transitions, offering concrete solutions for decarbonizing buildings, industries, and territories through various technical services. | IT Services and IT Consulting | 🇫🇷 Cergy-Pontoise | 9,833 |  |
| 2 | [Astek](https://www.tamtam.ai/c/astek) (astekgroup.fr)<br>Supports clients with high-value service, deep technical expertise across technology, operations, and engineering, focusing on sustainable digital transformation with humans at the core. | IT Services and IT Consulting | 🇫🇷 Boulogne-Billancourt | 6,035 | 1988 |
| 3 | [adista](https://www.tamtam.ai/c/adista) (adista.fr)<br>Provides comprehensive IT services, including hosting, telecommunications, and system integration, for SMEs, public entities, and healthcare organizations, offering high-speed internet access and disaster recovery. | IT Services and IT Consulting | 🇫🇷 Maxéville | 745 | 1981 |
| 4 | [Ekinops](https://www.tamtam.ai/c/ekinops) (ekinops.com)<br>Provides open, trusted, and innovative network connectivity solutions. Delivers high value-added software-driven solutions for optical transport and virtualized managed enterprise services. | Telecommunications | 🇫🇷 Lannion | 509 | 2003 |
| 5 | [Hervé Schauer Consultants (HSC)](https://www.tamtam.ai/c/herve-schauer-consultants-hsc) (hs2.fr)<br>Provides information security consulting, audits, penetration tests, risk management, and training services to secure diverse infrastructures and systems. | Computer and Network Security | 🇫🇷 Neuilly-sur-Seine | 500 | 1989 |
| 6 | [Hexanet](https://www.tamtam.ai/c/hexanet) (hexanet.fr)<br>A Reims-based team of internet, network, and telecommunications professionals offering specialized services such as telecom, unified telephony, hosting, and more | IT Services and IT Consulting | 🇫🇷 Reims | 225 | 1997 |
| 7 | [Mairistem](https://www.tamtam.ai/c/mairistem) (jvs-mairistem.fr)<br>JVS-Mairistem provides digital solutions for local governments, helping them streamline operations and enhance efficiency through modern and integrated systems | Software Development | 🇫🇷 Saint-Martin-sur-le-Pré | 209 | 1983 |
| 8 | [Groupe ANTARES \| Infogérance & Services Numériques](https://www.tamtam.ai/c/groupe-antares-infogerance-and-services-numeriques) (antares.fr)<br>Providing IT managed services, infrastructure supervision, information system security, connectivity cabling, and multimedia solutions for private companies and public organizations across France. | IT Services and IT Consulting | 🇫🇷 Levallois-Perret | 111 | 2001 |
| 9 | [Systancia](https://www.tamtam.ai/c/systancia) (systancia.com)<br>Systancia provides a unique "zero-trust" platform for cybersecurity, combining IAM, PAM, and ZTNA to secure workforce access and compliance efficiently | Software Development | 🇫🇷 Sausheim | 101 | 1998 |
| 10 | [Digora](https://www.tamtam.ai/c/digora) (deep.eu)<br>Expert in data management, supporting companies with digital transformation, infrastructure, maintenance, and innovation for availability, performance, and security. | IT Services and IT Consulting | 🇫🇷 Strasbourg | 100 | 1997 |
| 11 | [Castelis](https://www.tamtam.ai/c/castelis) (castelis.com)<br>Develops custom software solutions for various sectors, including e-commerce, works councils, service companies, and general businesses, covering web technologies and database management. | IT System Custom Software Development | 🇫🇷 Ivry-sur-Seine | 93 | 1999 |
| 12 | [Trustteam France](https://www.tamtam.ai/c/trustteam-france) (trustteam.fr)<br>With nearly 60 years of experience, the company provides comprehensive IT solutions, specializing in design, deployment, and maintenance to meet clients' digital transformation needs | IT Services and IT Consulting | 🇫🇷 Maxeville | 92 | 1981 |
| 13 | [AMOSSYS](https://www.tamtam.ai/c/amossys) (almond.eu)<br>Amossys is a French cybersecurity consultancy specializing in strategic sectors, providing expertise, accredited IT security evaluations, and a range of cyber services | Computer and Network Security | 🇫🇷 Rennes | 64 | 2007 |
| 14 | [NXO Telecom](https://www.tamtam.ai/c/nxo-telecom) (nxo.eu)<br>NXO Telecom, a subsidiary of NXO France group, specializes in digital integration and management for businesses, focusing on communication, collaboration, infrastructure, security, and services | IT Services and IT Consulting | 🇫🇷 WITTELSHEIM (Alsace) | 49 | 1989 |
| 15 | [Kaspersky France and North, West & Central Africa](https://www.tamtam.ai/c/kaspersky-france-and-north-west-and-central-africa) (kaspersky.fr)<br>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. | Computer and Network Security | 🇫🇷 La Defense Cedex | 44 | 1997 |
| 16 | [Lex Persona](https://www.tamtam.ai/c/lex-persona) (goodflag.com)<br>A French software publisher and trust service provider specializing in probative dematerialization, offering secure electronic signature, sealing, and data protection solutions | Software Development | 🇫🇷 St André les Vergers | 41 | 2005 |
| 17 | [Reboot Conseil](https://www.tamtam.ai/c/reboot-conseil) (reboot-conseil.com)<br>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 | IT Services and IT Consulting | 🇫🇷 Strasbourg | 40 | 2020 |
| 18 | [IPGARDE](https://www.tamtam.ai/c/ipgarde) (ipgarde.com)<br>Provides enterprise-level international cloud hosting services and solutions for businesses from SMB to Fortune 500, ensuring high customer satisfaction for various applications. | IT Services and IT Consulting | 🇫🇷 Alixan | 36 | 2004 |
| 19 | [ANOZR WAY](https://www.tamtam.ai/c/anozr-way) (anozrway.com)<br>French software editor providing a platform reducing human attack surface, protecting against cyber and fraud risks using automated, proprietary technology, GDPR compliant. | Data Security Software Products | 🇫🇷 Cesson-Sévigné | 26 | 2019 |
| 20 | [cyberelements](https://www.tamtam.ai/c/cyberelements) (cyberelements.io)<br>A security platform ensuring organizations are protected from cyberattacks while maintaining workforce productivity through secure access and identity management solutions | Computer and Network Security | 🇫🇷 Sausheim | 26 |  |
| 21 | [D2B Informatique](https://www.tamtam.ai/c/d2b-informatique) (d2b.com)<br>A distributor specializing in infrastructure solutions for data protection, data management, and cybersecurity, providing training and support to IT professionals for over 20 years | IT Services and IT Consulting | 🇫🇷 Charenton-le-Pont | 24 | 1989 |
| 22 | [APSecurity](https://www.tamtam.ai/c/apsecurity) (apsecurity.fr)<br>A cybersecurity company in the Ardennes specializing in securing digital data for a diverse clientele through audits, personalized support, and comprehensive training programs | Computer and Network Security | 🇫🇷 Charleville-Mézières | 17 | 2022 |
| 23 | [Private Discuss](https://www.tamtam.ai/c/private-discuss) (private-discuss.com)<br>Offers a videoconferencing solution prioritizing user well-being, data privacy with French servers, and environmental impact through optimized development and tree planting. | Data Security Software Products | 🇫🇷 Limonest | 17 |  |
| 24 | [GS GROUP](https://www.tamtam.ai/c/gs-group) (gs-group.fr)<br>Specializing in security technologies and digitalization, this company focuses on innovation in the field of technology solutions | Security Systems Services | 🇫🇷 Didenheim | 17 |  |
| 25 | [IT CONSULTANT SERVICES](https://www.tamtam.ai/c/it-consultant-services) (itconsultant.fr)<br>Specializing in Cloud Architecture & Security, IT Consultant Services helps clients migrate workloads to the cloud and design new delivery models with cloud technologies | IT System Design Services | 🇫🇷 Strasbourg | 16 | 2011 |
| 26 | [SFR Business Est](https://www.tamtam.ai/c/sfr-business-est) (sfrbusiness.fr)<br>SFR Business Distribution is a national distributor of business solutions, offering a range of services from mobile to IoT, supporting growth and digital transformation | Telecommunications | 🇫🇷 Metz | 16 | 1999 |
| 27 | [Tracip by ChapsVision](https://www.tamtam.ai/c/tracip-by-chapsvision) (tracip.fr)<br>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 | Computer and Network Security | 🇫🇷 Messein | 15 | 1994 |
| 28 | [Montimage](https://www.tamtam.ai/c/montimage) (montimage.eu)<br>Development of AI-powered cybersecurity solutions focusing on autonomous network security monitoring, threat detection, analysis, and incident response workflows. | Computer and Network Security | 🇫🇷 | 15 | 2004 |
| 29 | [Le 16 Solutions](https://www.tamtam.ai/c/le-16-solutions) (le16solutions.com)<br>16Solutions provides B2B IT services since 1988, offering expertise in hardware, software, development, hosting, and more, with a focus on building long-lasting partnerships | Computer Networking Products | 🇫🇷 Frouard | 13 | 1988 |
| 30 | [NIS GROUP FRANCE](https://www.tamtam.ai/c/nis-group-france) (nis-group.fr)<br>A professional consulting firm offering IT, telecommunications, and cybersecurity services with a focus on customer satisfaction, tailored solutions, and continuous training | Computer and Network Security | 🇫🇷 Fagnières | 12 | 2010 |
| 31 | [KIWI BACKUP - L'intelligence de la sauvegarde](https://www.tamtam.ai/c/kiwi-backup-l-intelligence-de-la-sauvegarde) (kiwi-backup.com)<br>A pioneer in outsourced backup, providing secure data storage solutions in French data centers for businesses of all sizes Offering tailored services and support | Computer and Network Security | 🇫🇷 Mulhouse | 11 | 2003 |
| 32 | [LPB Conseil](https://www.tamtam.ai/c/lpb-conseil) (lpb-conseil.com)<br>Support IT and security leaders in digital transformation, cybersecurity risk management, and guiding business units towards effective digital usage and methods. | IT Services and IT Consulting | 🇫🇷 Strasbourg | 11 | 2018 |
| 33 | [AMI - Audit Management Intégration](https://www.tamtam.ai/c/ami-audit-management-integration) (ami-gestion.fr)<br>Offers a comprehensive solution unifying telephony, internet, cybersecurity, backup, cloud, and IT. Provides a single partner and invoice for these essential services. | Technology, Information and Internet | 🇫🇷 Guyancourt | 10 |  |
| 34 | [BonjourCyber](https://www.tamtam.ai/c/bonjourcyber) (bonjourcyber.com)<br>BonjourCyber® offers a comprehensive cybersecurity service for small and medium-sized businesses, helping them reduce cyber risks through a 3-step process | IT Services and IT Consulting | 🇫🇷 Paris | 8 | 2022 |
| 35 | [ID Protect](https://www.tamtam.ai/c/id-protect) (idprotect.fr)<br>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. | Software Development | 🇫🇷 Paris | 6 | 2021 |
| 36 | [be ys Trusted Solutions](https://www.tamtam.ai/c/kipmi-digital-trust-continuity) (kipmi.com)<br>Delivers innovative, high-performing digital trust services, mastering digital identity, electronic signature, contracting, document sharing, registered mail, and probative archiving. | IT Services and IT Consulting | 🇫🇷 Clermont-Ferrand | 6 | 2000 |
| 37 | [Thalyos](https://www.tamtam.ai/c/thalyos) (cyberpreventys.com)<br>A digital services company specializing in developing, securing, and maintaining IT infrastructure while focusing on cybersecurity to make businesses cyber-resilient | IT Services and IT Consulting | 🇫🇷 Florange | 5 | 2002 |
| 38 | [Science Edu Agency](https://www.tamtam.ai/c/science-edu-agency) (agency.science-edu.fr)<br>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 | Computer and Network Security | 🇫🇷 Soultz-sous-Forêts | 2 | 2024 |
| 39 | [Eurocybersecurite](https://www.tamtam.ai/c/eurocybersecurite) (eurocybersecurite.fr)<br>Eurocybersecurite specializes in digital security, offering customized solutions that meet standards and regulations Services include digital consulting, cybersecurity training, audits, and more | IT Services and IT Consulting | 🇫🇷 Strasbourg | 2 | 2023 |

## 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

- [The largest companies in Grand Est](https://www.tamtam.ai/l/largest-companies-grand-est) (5,700)
- [Multinational companies in Grand Est](https://www.tamtam.ai/l/multinational-companies-grand-est) (787)
- [Companies with in-house R&D in Grand Est](https://www.tamtam.ai/l/r-and-d-companies-grand-est) (640)
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- [Public sector organisations in Grand Est](https://www.tamtam.ai/l/public-sector-organisations-grand-est) (425)
- [Family-owned companies in Grand Est](https://www.tamtam.ai/l/family-owned-companies-grand-est) (365)
- [Hardware manufacturers in Grand Est](https://www.tamtam.ai/l/hardware-companies-grand-est) (342)
- [Professional services firms in Grand Est](https://www.tamtam.ai/l/professional-services-firms-grand-est) (316)
- [Distributors and wholesalers in Grand Est](https://www.tamtam.ai/l/distributors-and-wholesalers-grand-est) (307)
- [Critical infrastructure operators in Grand Est](https://www.tamtam.ai/l/critical-infrastructure-operators-grand-est) (257)
- [IT services companies in Grand Est](https://www.tamtam.ai/l/it-services-companies-grand-est) (248)
- [SaaS companies in Grand Est](https://www.tamtam.ai/l/saas-companies-grand-est) (216)
- [Education providers in Grand Est](https://www.tamtam.ai/l/education-companies-grand-est) (215)
- [IT Services and IT Consulting companies in Grand Est](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-grand-est) (213)
- [Software Development companies in Grand Est](https://www.tamtam.ai/l/software-development-companies-grand-est) (211)
- [Healthcare providers in Grand Est](https://www.tamtam.ai/l/healthcare-providers-grand-est) (202)
- [Construction companies in Grand Est](https://www.tamtam.ai/l/construction-companies-grand-est) (196)
- [Contract manufacturers in Grand Est](https://www.tamtam.ai/l/contract-manufacturers-grand-est) (192)
- [Retail companies in Grand Est](https://www.tamtam.ai/l/retail-companies-grand-est) (169)
- [Government Administration companies in Grand Est](https://www.tamtam.ai/l/government-administration-companies-grand-est) (167)
- [Industrial Machinery Manufacturing companies in Grand Est](https://www.tamtam.ai/l/industrial-machinery-manufacturing-companies-grand-est) (166)
- [Consulting firms in Grand Est](https://www.tamtam.ai/l/consulting-firms-grand-est) (165)
- [Food and beverage companies in Grand Est](https://www.tamtam.ai/l/food-and-beverage-companies-grand-est) (161)

## The same list elsewhere in France

- [Cybersecurity companies in France](https://www.tamtam.ai/l/cybersecurity-companies-france) (958)
- [Cybersecurity companies in Île-de-France](https://www.tamtam.ai/l/cybersecurity-companies-ile-de-france) (525)
- [Cybersecurity companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/cybersecurity-companies-hauts-de-seine) (154)
- [Cybersecurity companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/cybersecurity-companies-auvergne-rhone-alpes) (91)
- [Cybersecurity companies in Occitanie](https://www.tamtam.ai/l/cybersecurity-companies-occitanie) (49)
- [Cybersecurity companies in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/cybersecurity-companies-provence-alpes-cote-dazur) (48)
- [Cybersecurity companies in the Rhône department](https://www.tamtam.ai/l/cybersecurity-companies-rhone) (48)
- [Cybersecurity companies in Hauts-de-France](https://www.tamtam.ai/l/cybersecurity-companies-hauts-de-france) (44)
- [Cybersecurity companies in Brittany](https://www.tamtam.ai/l/cybersecurity-companies-brittany) (37)
- [Cybersecurity companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/cybersecurity-companies-bouches-du-rhone) (36)
- [Cybersecurity companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/cybersecurity-companies-nouvelle-aquitaine) (35)
- [Cybersecurity companies in the Nord department](https://www.tamtam.ai/l/cybersecurity-companies-nord) (30)
- [Cybersecurity companies in Pays de la Loire](https://www.tamtam.ai/l/cybersecurity-companies-pays-de-la-loire) (28)
- [Cybersecurity companies in the Haute-Garonne department](https://www.tamtam.ai/l/cybersecurity-companies-haute-garonne) (27)
- [Cybersecurity companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/cybersecurity-companies-ille-et-vilaine) (25)
- [Cybersecurity companies in the Yvelines department](https://www.tamtam.ai/l/cybersecurity-companies-yvelines) (25)
- [Cybersecurity companies in Paris](https://www.tamtam.ai/l/cybersecurity-companies-paris) (290)

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Source: https://www.tamtam.ai/l/cybersecurity-companies-grand-est