Company lists · Data refreshed September 2026

Top 25 Cybersecurity incident response firms based in Belgium

RevenueBase identified 84 company matches for cybersecurity incident response firms associated with Belgium as of September 2026 and tracks 2,493 professional contacts across them, including 157 with verified work emails and 189 with mobile numbers. Antwerp is the largest hub.

This list covers company matches for cybersecurity incident response firms 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 1, 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 1, 2026 How this list was built
84Companies
2,493Contacts tracked
157Verified emails
189Mobile numbers
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The 25 largest cybersecurity incident response firms based in Belgium

Ranked by team size
Top 25 of 84 company matches for cybersecurity incident response firms based in Belgium, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 1, 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 matchMechelen, Belgium51-20093 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
2Exact matchBelsele, Belgium11-5027 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 1, 2026 · View company records in RevenueBase
3Exact matchBelgium11-5020 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 1, 2026 · View company records in RevenueBase
4Exact matchBelgium11-5020 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
5Exact matchKontich, Belgium11-5018 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 1, 2026 · View company records in RevenueBase
6Exact matchFroyennes, Belgium11-5018 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 1, 2026 · View company records in RevenueBase
7Exact matchOttignies-Louvain-La-Neuve, Belgium1-1016 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 1, 2026 · View company records in RevenueBase
8Exact matchBrussels, Belgium51-20013 contacts →

Exact match

“CERT is part of the Centre for Cybersecurity Belgium.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
9Exact matchKontich, Belgium1-1010 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 1, 2026 · View company records in RevenueBase
10Exact matchBelgium1-1010 contacts →

Exact match

“Curiosity is a powerful force.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
11Exact matchSint-Niklaas, Belgium1-108 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 1, 2026 · View company records in RevenueBase
12Exact matchBelgium1-105 contacts →

Exact match

“At Resilix, we focus on providing targeted security solutions designed from a pragmatic approach to best protect your organisation from today's complex threats.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
13Exact matchHannut, Belgium1-105 contacts →

Exact match

“Guardis helps organizations design, secure and operate their IT infrastructure, from cloud-native environments to industrial systems.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
14Exact matchBilzen, Belgium1-104 contacts →

Exact match

“We integrate the NIS2 Audicy framework for national Key companies & the ICT supply chain as a roadmap to NIS2 certification.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
15Exact matchZoutleeuw, Belgium1-104 contacts →

Exact match

“We are a team of cyber security experts with extensive experience in many industries.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
16Exact matchGentbrugge, Belgium1-104 contacts →

Exact match

“To protect global enterprises from emerging cyber security threats by delivering reliable and transparent services around the clock.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
17Exact matchTournai, Belgium1-104 contacts →

Exact match

“Détecter, Analyser, Former.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
18Exact matchBruxelles Bruxelles, Belgium11-503 contacts →

Exact match

“INFOSEC4YOU est une Start-up spécialisée exclusivement dans la cybersécurité, nous protégeons les données, les entreprises et les citoyens contre la cybercriminalité et les…”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
19Exact matchLeuven, Belgium1-103 contacts →

Exact match

“He who defends everything, defends nothing” - No IT Security team can monitor every application, network, system and information asset that a company has, no incident response…”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
20Exact matchBelgium11-502 contacts →

Exact match

“At Threatproof, our mission is to redefine cybersecurity for businesses of all sizes.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
21Exact matchNamur, Belgium1-102 contacts →

Exact match

“Chez ODSC, nous accompagnons les entreprises dans la sécurisation de leurs actifs numériques à travers une approche complète et humaine de la cybersécurité.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
22Exact matchLubbeek, Belgium1-102 contacts →

Exact match

“Mission: ZeroBit wants to offer an 'end-to-end' security for all types of companies.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
23Exact matchBruges, Belgium1-101 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
24Exact matchKontich, Belgium1-101 contacts →

Exact match

“CyberTronica helps organizations secure their infrastructure.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
25Exact matchGenk, Belgium1-101 contacts →

Exact match

“Securenza is a cyber security services company with the aim to improve the overall security posture and security practices of our clients.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase

Showing 25 of 84 cybersecurity incident response firms based in Belgium

See the full list, filter by size, metro and specialty, and access 157 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cybersecurity incident response firms based in Belgium at a glance

As of Sep 1, 2026
6.3%Verified-email coverage
7.6%Mobile-number coverage
29.7Average contacts per company
1-10Median size (employees)
9.5%Largest-city concentration · Antwerp
Sep 1, 2026Page data refreshed

Companies by employee count

1-10
58
11-50
21
51-200
3
201-500
1
1,001-5,000
1

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 “cybersecurity incident response firms” 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 157 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 1, 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 “cybersecurity incident response firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity incident response firms are there based in Belgium?

RevenueBase identified 84 company matches for cybersecurity incident response firms 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?

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

Which city has the most cybersecurity incident response firms?

Antwerp leads with 8 company records, followed by Brussels (6) and Kontich (3).

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 157 professional contacts with verified work emails tracked across these 84 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 1, 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.