# Top 50 cybersecurity companies in Belgium

Tamtam tracks 69 cybersecurity companies headquartered in Belgium. This list ranks the 50 largest by number of employees on LinkedIn, led by Cegeka, NATO Communications and Information Agency (NCIA) and CBTW. Their median headcount is 81. Half of them were founded in 2012 or later. The most common headquarters are Brussels (10), Antwerp (4) and Leuven (4).

These are large and mid-sized Belgian companies primarily in IT services and consulting, with a focus on cybersecurity solutions. Firms like Cegeka, with over 5,000 employees, provide IT solutions, while NATO Communications and Information Agency (NCIA) safeguards networks. Intigriti empowers organizations to fix vulnerabilities, and NVISO Security offers cybersecurity services. The list shows a strong concentration of companies in the IT sector.

Many of these companies, such as NRB and Easi, offer a broad range of IT services including software development, infrastructure, and cloud solutions, often with an integrated cybersecurity component. A significant number of headquarters are located in Brussels, indicating a central hub for these IT and cybersecurity firms in Belgium. The companies also frequently serve a wide range of sectors and clients, from large enterprises to mid-market businesses.

🇧🇪 Belgium · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Cegeka](https://www.tamtam.ai/c/cegeka) (cegeka.com)<br>A family-owned IT solutions provider focused on creating personalized customer experiences, aiming to become the leading European orchestrator of digital business platforms | IT Services and IT Consulting | 🇧🇪 Hasselt | 5,167 | 1992 |
| 2 | [NATO Communications and Information Agency (NCIA)](https://www.tamtam.ai/c/nato-communications-and-information-agency-ncia) (nato.int)<br>NATO's technology and cyber experts with a team of 3,000 members across Europe and North America, safeguarding networks and providing critical capabilities to preserve peace and security | IT Services and IT Consulting | 🇧🇪 Brussels | 2,545 | 2012 |
| 3 | [CBTW](https://www.tamtam.ai/c/cbtw) (cbtw.tech)<br>Global tech solutions company focusing on collaboration, strategy, technology, and design to create purposeful products and invest in education initiatives globally | IT Services and IT Consulting | 🇧🇪 Brussels | 1,646 |  |
| 4 | [NRB](https://www.tamtam.ai/c/nrb) (keyes.eu)<br>A leading ICT provider in Belgium, offering consultancy, software, infrastructure, cloud services, and staffing solutions across various sectors with state-of-the-art datacenters | IT Services and IT Consulting | 🇧🇪 Liège | 1,357 | 1987 |
| 5 | [Intigriti](https://www.tamtam.ai/c/intigriti) (intigriti.com)<br>Empowering large organizations to find and fix vulnerabilities using a platform and global security researchers, preventing costly breaches through various security solutions. | Computer and Network Security | 🇧🇪 Antwerp | 782 | 2016 |
| 6 | [Easi](https://www.tamtam.ai/c/easi-nivelles) (easi.net)<br>Easi, a Belgian IT company, provides software development, IT infrastructure, cloud services, and cybersecurity solutions for mid-market businesses. | IT Services and IT Consulting | 🇧🇪 Nivelles | 709 | 1999 |
| 7 | [Telenet Business](https://www.tamtam.ai/c/telenet-business) (www2.telenet.be)<br>Telenet Business provides Belgian entrepreneurs with digital solutions including connectivity, network, security, and IT services, ensuring a smooth digital flow for businesses of all sizes | Telecommunications | 🇧🇪 Mechelen | 656 | 2002 |
| 8 | [AXI IT Services](https://www.tamtam.ai/c/axi-it-services) (axi.be)<br>Innovative software and IT solutions provider for various industries, helping clients succeed and achieve their vision with offices in Netherlands and Belgium | IT Services and IT Consulting | 🇧🇪 Willebroek | 497 | 1985 |
| 9 | [Proximus NXT](https://www.tamtam.ai/c/proximus-nxt) (proximusnxt.be)<br>Support medium and large companies with digital transformation through cloud, data management, AI, cybersecurity, and strategic technology partnerships. | Technology, Information and Internet | 🇧🇪 Brussels | 479 |  |
| 10 | [Lansweeper](https://www.tamtam.ai/c/lansweeper) (lansweeper.com)<br>Provides a centralized platform for managing IT assets, enhancing visibility, automating tasks, and supporting cybersecurity through comprehensive asset discovery and management. | Software Development | 🇧🇪 Merelbeke | 422 | 2004 |
| 11 | [Yuma](https://www.tamtam.ai/c/yuma-brussels) (weareyuma.com)<br>A BeNeLux digital transformation group focusing on combining human and digital transformation, with expertise from various companies within the group | Artificial Intelligence | 🇧🇪 Brussels | 383 |  |
| 12 | [NVISO Security](https://www.tamtam.ai/c/nviso-security) (nviso.eu)<br>Provides cyber security services using skilled professionals, preventing and detecting security challenges for clients with positive business outcomes. | Computer and Network Security | 🇧🇪 Brussels | 348 | 2013 |
| 13 | [Trustteam België / Belgique](https://www.tamtam.ai/c/trustteam-belgie-belgique) (trustteam.eu)<br>Leading provider of IT managed services offering cloud, infrastructure, networking, security, software, VoIP, and support solutions with multiple certified data centers | IT Services and IT Consulting | 🇧🇪 Kortrijk | 275 | 2002 |
| 14 | [Aikido Security](https://www.tamtam.ai/c/aikido-security) (aikido.dev)<br>Automated platform for secure code, cloud, and runtime environments with AI-driven vulnerability detection and remediation for engineering teams. | Software Development | 🇧🇪 Ghent | 249 | 2022 |
| 15 | [NRB International Organisations (TRASYS)](https://www.tamtam.ai/c/nrb-international-organisations-trasys) (trasysinternational.com)<br>Specialized ICT provider offering IT solutions and consulting for International Public and Corporate Organizations, focusing on compliance, digital transformation, and efficiency | IT Services and IT Consulting | 🇧🇪 Herstal | 244 | 2017 |
| 16 | [RHEA Group](https://www.tamtam.ai/c/rhea-group) (rheagroup.com)<br>Engineering solutions, system development and cybersecurity services for space, government and defense organizations across Europe and North America through diverse mission support programs. | Defense and Space Manufacturing | 🇧🇪 Wavre | 239 | 1992 |
| 17 | [VanRoey](https://www.tamtam.ai/c/vanroey) (vanroey.be)<br>IT-services provider specializing in digitalization through automation, software, services, and Hybrid-IT infrastructure, prioritizing security and data protection for companies' digital transformation | IT Services and IT Consulting | 🇧🇪 Turnhout | 228 | 1993 |
| 18 | [ConXioN](https://www.tamtam.ai/c/conxion) (conxion.be)<br>A Flemish ICT service provider offering hardware, infrastructure, security, and software solutions to SMEs, Midrange, and Enterprise segments with strong partnerships and innovative Experience Center | IT Services and IT Consulting | 🇧🇪 Deerlijk | 195 | 1997 |
| 19 | [Guardsquare](https://www.tamtam.ai/c/guardsquare) (guardsquare.com)<br>A leading provider of mobile application security solutions, offering a comprehensive approach to protecting apps through code hardening and real-time threat visibility | Software Development | 🇧🇪 Leuven | 180 | 2014 |
| 20 | [Cegeka Belgium (CTG)](https://www.tamtam.ai/c/cegeka-belgium-ctg) (cegeka.com)<br>CTG accelerates digital transformation by providing innovative solutions and services to achieve business and IT outcomes with agility and confidence | Software Development | 🇧🇪 Diegem | 117 |  |
| 21 | [itsme®](https://www.tamtam.ai/c/itsme) (itsme-id.com)<br>A secure identity solution offering a unique combination of four different services, focused on building trust and security for users | Technology, Information and Internet | 🇧🇪 Brussels | 116 | 2017 |
| 22 | [Proximus Ada](https://www.tamtam.ai/c/proximus-ada) (proximus-ada.com)<br>A Belgian Center of Excellence focusing on artificial intelligence and cybersecurity to address challenges and become a European reference in these fields | Computer and Network Security | 🇧🇪 Saint-Josse-ten-Noode | 112 | 2022 |
| 23 | [ACEN](https://www.tamtam.ai/c/acen-kontich) (acen.eu)<br>Offers tailored, end-to-end solutions for cybersecurity needs, focusing on providing comprehensive and suitable services for protection. | Technology, Information and Internet | 🇧🇪 Kontich | 91 |  |
| 24 | [Approach Cyber](https://www.tamtam.ai/c/approach-cyber) (approach-cyber.com)<br>Supports organizations with cyber resilience solutions. Combines strategic advice, offensive/defensive expertise, SOC operations, and managed security platform for digital peace of mind. | Computer and Network Security | 🇧🇪 Mont-Saint-Guibert | 82 | 2001 |
| 25 | [Phished](https://www.tamtam.ai/c/phished) (phished.io)<br>Offers AI-powered cybersecurity training, personalized phishing simulations, and threat intelligence to reduce human error and improve organizational security posture. | Computer and Network Security | 🇧🇪 Leuven | 81 | 2018 |
| 26 | [Toreon](https://www.tamtam.ai/c/toreon) (toreon.com)<br>Independent consultants providing information security advice to help organizations safely leverage technology, make informed decisions, and achieve digital goals with confidence and trust. | Computer and Network Security | 🇧🇪 Antwerp | 69 | 2013 |
| 27 | [Leonardo Belgium](https://www.tamtam.ai/c/leonardo-belgium) (taleez.com)<br>A subsidiary specializing in aerospace, defense, and security with divisions in helicopters, aircraft, electronics, aerostructures, and cybersecurity, offering maintenance, material services, and innovative cybersecurity solutions | Defense and Space Manufacturing | 🇧🇪 Brussels | 59 |  |
| 28 | [Deutsche Telekom Global Business Solutions Belgium NV/SA](https://www.tamtam.ai/c/deutsche-telekom-global-business-solutions-belgium-nv-sa) (telekom.com)<br>Provider of network and ICT security services to international public sector organizations and global players in automotive, FMCG, and manufacturing industries | IT Services and IT Consulting | 🇧🇪 Brussels | 40 | 2001 |
| 29 | [SecWise](https://www.tamtam.ai/c/secwise) (secwise.be)<br>Provide expert services, guidance in security, and compliance for cloud and mobile-first environments, developing mature cybersecurity strategies and architectures. | IT Services and IT Consulting | 🇧🇪 Leuven | 39 | 2018 |
| 30 | [CERT-EU](https://www.tamtam.ai/c/cert-eu) (cert.europa.eu)<br>This company contributes to the security of the ICT infrastructure of EU institutions, offering support in preventing, detecting, and responding to cyber-attacks | Computer and Network Security | 🇧🇪 Brussels | 39 | 2012 |
| 31 | [Infinigate Belgium](https://www.tamtam.ai/c/infinigate-belgium) (infinigate.com)<br>Value-add distributor of leading-edge cybersecurity solutions across EMEA, with dedicated technical experts providing secure network and cloud protection for SMBs and enterprises | Computer and Network Security | 🇧🇪 Mechelen | 39 | 1991 |
| 32 | [axl & trax](https://www.tamtam.ai/c/axl-and-trax) (axl-trax.com)<br>Specializes in providing security solutions for well-managed organizations utilizing SAP systems, offering expertise tailored to enhance protection and minimize vulnerabilities | IT Services and IT Consulting | 🇧🇪 Hasselt | 37 | 1997 |
| 33 | [Mind](https://www.tamtam.ai/c/mind) (mind.be)<br>A consultancy providing engineering services, training, and support in Linux, Android, and open-source software for embedded systems to international clients | Software Development | 🇧🇪 Leuven | 35 | 1999 |
| 34 | [Hex-Rays](https://www.tamtam.ai/c/hex-rays) (hex-rays.com)<br>An independent company developing cutting-edge software analysis solutions, specializing in reverse-engineering, hostile code analysis, and vulnerability research for digital security | Software Development | 🇧🇪 Liège | 35 | 2005 |
| 35 | [Interligo](https://www.tamtam.ai/c/interligo) (interligo.be)<br>This company specializes in personalized network solutions to help businesses achieve their goals within budget, focusing on security, user access, collaboration, and more | IT Services and IT Consulting | 🇧🇪 Kontich | 34 | 2013 |
| 36 | [Sertalink](https://www.tamtam.ai/c/sertalink) (sertalink.com)<br>Specialized in cutting-edge security solutions including identity and access management, data governance, data loss prevention, and remote access session monitoring for IT infrastructures | IT Services and IT Consulting | 🇧🇪 St-Niklaas | 32 | 2016 |
| 37 | [The Collective Consulting](https://www.tamtam.ai/c/the-collective-consulting) (thecollective.eu)<br>A highly-skilled Microsoft Gold Partner specializing in security, compliance, endpoint management, messaging, Microsoft Teams voice, and meetings Employs certified professionals for quality services | IT Services and IT Consulting | 🇧🇪 Lochristi | 32 | 2019 |
| 38 | [Exclusive Networks - Belgium](https://www.tamtam.ai/c/exclusive-networks-belgium) (linktr.ee)<br>Global cybersecurity specialist providing partners and customers unique service portfolios, technical know-how, managed security, and training through a curated leading vendor network worldwide. | Computer and Network Security | 🇧🇪 Duffel | 31 |  |
| 39 | [MTELECOM](https://www.tamtam.ai/c/mtelecom) (mtelecom.co.uk)<br>A consultancy firm specializing in cybersecurity solutions and services, helping businesses protect their digital assets from cyber threats and attacks | Computer and Network Security | 🇧🇪 Etterbeek | 25 | 2007 |
| 40 | [Resilient Security](https://www.tamtam.ai/c/resilient-security) (resilientsecurity.be)<br>Specializing in cyber security, we work to ensure every business is protected against threats and risks in the digital landscape | IT Services and IT Consulting | 🇧🇪 Antwerp | 24 | 2020 |
| 41 | [Nomios Belgium](https://www.tamtam.ai/c/nomios-belgium) (nomios.be)<br>This company develops secure and connected digital solutions and services, managing infrastructure and providing innovative security and network solutions for businesses | Computer and Network Security | 🇧🇪 Zaventem | 22 |  |
| 42 | [AXS Guard](https://www.tamtam.ai/c/axs-guard) (axsguard.com)<br>Belgian Cybersecurity specialist providing secure network connections, protection against cyber threats, VPN services, compliance monitoring, and managed security solutions for enterprises | Computer and Network Security | 🇧🇪 Mechelen | 22 | 1996 |
| 43 | [SHIELD vzw](https://www.tamtam.ai/c/shield-vzw) (shield-vzw.be)<br>Shield offers proactive IT expertise in cybersecurity, collaborating with healthcare and educational institutions to develop solutions against cyberthreats | IT Services and IT Consulting | 🇧🇪 Hasselt | 21 | 2023 |
| 44 | [Jimber](https://www.tamtam.ai/c/jimber) (jimber.io)<br>Protecting companies with user-friendly, innovative, and affordable cybersecurity solutions, ensuring their digital safety and operational continuity against threats. | IT Services and IT Consulting | 🇧🇪 Oostkamp | 21 | 2018 |
| 45 | [ActWise](https://www.tamtam.ai/c/actwise) (actwise.eu)<br>Specializing in identity security, ActWise helps companies protect against cyber threats with a privilege-centric approach, defending what matters most | IT Services and IT Consulting | 🇧🇪 Kontich | 21 | 2021 |
| 46 | [Silta](https://www.tamtam.ai/c/silta) (silta-ict.be)<br>Specializing in designing, implementing, and managing advanced network infrastructures, focusing on custom solutions that seamlessly integrate with business objectives Also offering scalable cloud solutions | IT Services and IT Consulting | 🇧🇪 Antwerp | 20 |  |
| 47 | [MCG](https://www.tamtam.ai/c/mcg) (mcg.be)<br>Specializing in cybersecurity, this company helps protect assets from complex cyber attacks, whether hosted internally or in the Cloud, ensuring business continuity | Computer and Network Security | 🇧🇪 Ottignies-Louvain-La-Neuve | 19 | 2000 |
| 48 | [Hybrid Core](https://www.tamtam.ai/c/hybrid-core) (hybridcore.eu)<br>Hybrid Core specializes in guiding organizations through challenging and risky operating environments to ensure success | Technology, Information and Internet | 🇧🇪 Zaventem | 18 | 2020 |
| 49 | [Engineering International Belgium](https://www.tamtam.ai/c/engineering-international-belgium) (eng.it)<br>An IT consultancy company specializing in serving EU bodies, delivering innovative solutions, and assigning specialists to key IT framework contracts at the European Commission | IT Services and IT Consulting | 🇧🇪 Brussels | 16 | 2008 |
| 50 | [Barbarians](https://www.tamtam.ai/c/barbarians) (barbarians.io)<br>Provides cloud-first, managed SIEM system with integrated AI for enterprise security incident monitoring, alerting & reporting, deployed on AWS, Azure, or Google Cloud | Software Development | 🇧🇪 Ghent | 16 | 2018 |

## 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 Belgium

- [The largest companies in Belgium](https://www.tamtam.ai/l/largest-companies-belgium) (6,987)
- [Multinational companies in Belgium](https://www.tamtam.ai/l/multinational-companies-belgium) (1,745)
- [Manufacturers in Belgium](https://www.tamtam.ai/l/manufacturers-belgium) (630)
- [Retail chains in Belgium](https://www.tamtam.ai/l/retail-chains-belgium) (622)
- [Companies with in-house R&D in Belgium](https://www.tamtam.ai/l/r-and-d-companies-belgium) (605)
- [IT services companies in Belgium](https://www.tamtam.ai/l/it-services-companies-belgium) (551)
- [IT Services and IT Consulting companies in Belgium](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-belgium) (542)
- [Family-owned companies in Belgium](https://www.tamtam.ai/l/family-owned-companies-belgium) (435)
- [Software Development companies in Belgium](https://www.tamtam.ai/l/software-development-companies-belgium) (430)
- [Transportation, Logistics, Supply Chain and Storage companies in Belgium](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-belgium) (409)
- [SaaS companies in Belgium](https://www.tamtam.ai/l/saas-companies-belgium) (407)
- [Professional services firms in Belgium](https://www.tamtam.ai/l/professional-services-firms-belgium) (396)
- [Critical infrastructure operators in Belgium](https://www.tamtam.ai/l/critical-infrastructure-operators-belgium) (354)
- [Hardware manufacturers in Belgium](https://www.tamtam.ai/l/hardware-companies-belgium) (320)
- [Financial services firms in Belgium](https://www.tamtam.ai/l/financial-services-firms-belgium) (314)
- [Distributors and wholesalers in Belgium](https://www.tamtam.ai/l/distributors-and-wholesalers-belgium) (314)
- [Consulting firms in Belgium](https://www.tamtam.ai/l/consulting-firms-belgium) (285)
- [Retail companies in Belgium](https://www.tamtam.ai/l/retail-companies-belgium) (285)
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- [Truck Transportation companies in Belgium](https://www.tamtam.ai/l/truck-transportation-companies-belgium) (259)
- [Logistics companies in Belgium](https://www.tamtam.ai/l/logistics-companies-belgium) (258)
- [Advertising Services companies in Belgium](https://www.tamtam.ai/l/advertising-services-companies-belgium) (222)
- [Education providers in Belgium](https://www.tamtam.ai/l/education-companies-belgium) (209)
- [Consumer goods companies in Belgium](https://www.tamtam.ai/l/consumer-goods-companies-belgium) (205)

## The same list elsewhere in Belgium

- [Cybersecurity companies in Flanders](https://www.tamtam.ai/l/cybersecurity-companies-flanders) (45)

## The same list elsewhere

- [Cybersecurity companies in the world](https://www.tamtam.ai/l/cybersecurity-companies-in-the-world) (3,776)
- [Cybersecurity companies in Europe](https://www.tamtam.ai/l/cybersecurity-companies-in-europe) (2,197)

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