Company lists · Data refreshed September 2026

Top 25 Network security consultancies based in Belgium

RevenueBase identified 224 company matches for network security consultancies associated with Belgium as of September 2026 and tracks 1,454 professional contacts across them, including 653 with verified work emails. Brussels is the largest hub.

This list covers company matches for network security consultancies associated with Belgium, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built
224Companies
1,454Contacts tracked
653Verified emails
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The 25 largest network security consultancies based in Belgium

Ranked by team size
Top 25 of 224 company matches for network security consultancies based in Belgium, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchBrussels, BelgiumHQ recorded Sep 21, 2026201-500315 contacts →

Exact match

“NVISO is a cyber security services firm composed of outstanding security professionals - each has a specific field of expertise, ranging from security research and risk management…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchMont-saint-guibert, BelgiumHQ recorded Sep 21, 202651-20088 contacts →

Exact match

“Approach Cyber is a trusted cyber resilience partner supporting organizations across Belgium and Switzerland.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchMerelbeke, BelgiumHQ recorded Sep 21, 202651-20087 contacts →

Exact match

“Spotit is the trusted advisor for its customers and collaborates with them on innovative security & networking architectures that bring a big strategic advantage and insight.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchAntwerp, BelgiumHQ recorded Sep 21, 202651-20067 contacts →

Exact match

“At Toreon, we believe that security is vital for people to live and work confidently, with trust in our digital society.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchKontich, BelgiumHQ recorded Sep 21, 202651-20051 contacts →

Exact match

“Tailored, end-to-end solutions, suited to your cybersecurity needs.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchLeuven, BelgiumHQ recorded Sep 21, 202611-5028 contacts →

Exact match

“As Belgium’s largest Microsoft Security team and #1 Microsoft Gold Security Partner of the BeLux, we provide you a solid end-to-end security strategy to protect your organization…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchSt-niklaas, BelgiumHQ recorded Sep 21, 202611-5028 contacts →

Exact match

“Sertalink is a premier cybersecurity expert in Belgium and Luxembourg, serving as your organization's vigilant guardian in the digital world.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchMechelen, BelgiumHQ recorded Sep 21, 202611-5024 contacts →

Exact match

“Netleaf is your professional Network & Security integrator: A Single Point of Contact for Wired and Wireless Networking and its security.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchNiel, BelgiumHQ recorded Sep 21, 202611-5021 contacts →

Exact match

“The main goal of the Security Factory is to test/assess the current security maturity level of clients.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchBelgiumHQ recorded Sep 21, 202611-5020 contacts →

Exact match

“At Thales Cyber Solutions Belgium, we strive for security & privacy.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchBelgium France Luxembourg Netherlands, BelgiumHQ recorded Sep 21, 202611-5019 contacts →

Exact match

“Cresco is your partner in cybersecurity.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchAntwerp, BelgiumHQ recorded Sep 21, 202611-5018 contacts →

Exact match

“Resilient Security is your trusted partner in cybersecurity, bridging the gap between big consultancy firms and system integrators.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchKontich, BelgiumHQ recorded Sep 21, 202611-5018 contacts →

Exact match

“ActWise is the partner of choice for securing your identities and protecting what matters most within your company.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchFroyennes, BelgiumHQ recorded Sep 21, 202611-5018 contacts →

Exact match

“Our mission is to advise and support you in minimizing the attack surface that could threaten your business.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchOttignies-louvain-la-neuve, BelgiumHQ recorded Sep 21, 20261-1016 contacts →

Exact match

“Notre collaboration vous permet de vous défendre face aux diverses cyberattaques complexes et structurées pour protéger vos actifs, hébergés en interne ou dans le Cloud, et ainsi…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchVise, BelgiumHQ recorded Sep 21, 20261-1011 contacts →

Exact match

“EASI Network : Société de services et de conseils active dans les réseaux informatiques, IoT et télécoms à destination des entreprises et des institutions.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchBrussels, BelgiumHQ recorded Sep 21, 202611-5011 contacts →

Exact match

“A&P offers consulting expertise in data protection, cybersecurity and IT & Digital governance”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchAntwerp, BelgiumHQ recorded Sep 21, 20261-1010 contacts →

Exact match

“Curios is a boutique cybersecurity and compliance consultancy in Antwerp, serving enterprises across Belgium and Europe.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchZaventem, BelgiumHQ recorded Sep 21, 20261-109 contacts →

Exact match

“In a world where everything is connected and people are online all the time, data and resources are distributed and mobile.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchKontich, BelgiumHQ recorded Sep 21, 20261-108 contacts →

Exact match

“At Splynter we want to help companies understand their adversaries and how to combat them.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchSint-niklaas, BelgiumHQ recorded Sep 21, 20261-108 contacts →

Exact match

“Cybersecurity | Algemene IT-diensten | Digitale media Het digitale tijdperk heeft een enorme stroomversnelling gekend afgelopen jaren, dit is een trend die alleen nog maar zal…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchMechelen, BelgiumHQ recorded Sep 21, 202611-507 contacts →

Exact match

“The philosophy underlying our approach is one of open-mindedness and flexibility, whereby we do not restrict ourselves to any particular vendor or product, but instead remain…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchZwevezele, BelgiumHQ recorded Sep 21, 20261-107 contacts →

Exact match

“IT-infrastructuur & cybersecurity NIS2 compliance advies 24/7 monitoring & response Bedrijfskritische continuïteit Transformeren uw IT van risicofactor naar concurrentievoordeel.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchKampenhout, BelgiumHQ recorded Sep 21, 20261-106 contacts →

Exact match

“Protecting What Keeps the World Running At Defend-OT, we specialize in cybersecurity for Operational Technology (OT) and forming the bridge between IT, helping organizations…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchAarschot, BelgiumHQ recorded Sep 21, 20261-106 contacts →

Exact match

“Bij Fox & Fish Cyberdefense werken we op vier domeinen om uw organisatie te beveiligen tegen hacking en cyberaanvallen- Cybersecurity audits & risicoanalyses - Bewustmaking &…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 224 network security consultancies based in Belgium

See the full list, filter by size, metro and specialty, and access 653 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Network security consultancies based in Belgium at a glance

As of Sep 21, 2026
44.9%Verified-email coverage
6.5Average contacts per company
1-10Median size (employees)
10.3%Largest-city concentration · Brussels
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
175
11-50
37
51-200
7
201-500
3
1,001-5,000
1

Email recency for this list is measured worldwide rather than for Belgium, so it is reported there. Company counts and contact totals on this page are exact for Belgium, over 224 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Belgium whose business descriptions match “network security consultancies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 653 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “network security consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many network security consultancies are there based in Belgium?

RevenueBase identified 224 company matches for network security consultancies associated with Belgium as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Nviso Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most network security consultancies?

Brussels leads with 23 company records, followed by Antwerp (13) and Kontich (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 653 professional contacts with verified work emails tracked across these 224 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.