Company lists · Data refreshed September 2026

Top 25 Infrastructure security companies based in Belgium

Name: Infrastructure security companies based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 159 companies tracked

RevenueBase identified 159 infrastructure security companies headquartered in Belgium as of September 2026 and tracks 4,590 professional contacts across them, including 2,431 with verified work emails and 83 with mobile numbers. Brussels is the largest hub.

This list covers infrastructure security companies headquartered in Belgium, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

159Companies

4,590Contacts tracked

2,431Verified emails

83Mobile numbers

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The 25 largest infrastructure security companies based in Belgium

Ranked by team size

Top 25 of 159 infrastructure security companies based in Belgium, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure security companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Approach Cyber	Indirect evidence	Mont-saint-guibert, BelgiumHQ checked Sep 3, 2026	51-200	93 contacts →
	Indirect evidence “Approach Cyber is a trusted cyber resilience partner supporting organizations across Belgium and Switzerland.” Source: RevenueBase Database · checked Sep 3, 2026
2	ACEN	Indirect evidence	Kontich, BelgiumHQ checked Sep 3, 2026	51-200	50 contacts →
	Indirect evidence “Tailored, end-to-end solutions, suited to your cybersecurity needs.” Source: RevenueBase Database · checked Sep 3, 2026
3	Secwise	Partial evidence	Leuven, BelgiumHQ checked Sep 3, 2026	11-50	29 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 3, 2026
4	Sertalink	Indirect evidence	St-niklaas, BelgiumHQ checked Sep 3, 2026	11-50	27 contacts →
	Indirect evidence “Sertalink is a premier cybersecurity expert in Belgium and Luxembourg, serving as your organization's vigilant guardian in the digital world.” Source: RevenueBase Database · checked Sep 3, 2026
5	Upright Security	Indirect evidence	Kontich, BelgiumHQ checked Sep 3, 2026	11-50	21 contacts →
	Indirect evidence “As a strategic partner of Okta, SailPoint, Wiz, and Netskope, we deliver end-to-end cybersecurity across identity, cloud, and data.” Source: RevenueBase Database · checked Sep 3, 2026
6	Resilient Security	Partial evidence	Antwerp, BelgiumHQ checked Sep 3, 2026	11-50	20 contacts →
	Partial evidence “Resilient Security is your trusted partner in cybersecurity, bridging the gap between big consultancy firms and system integrators.” Source: RevenueBase Database · checked Sep 3, 2026
7	Thales Cyber Solutions Belgium	Partial evidence	BelgiumHQ checked Sep 3, 2026	11-50	20 contacts →
	Partial evidence “At Thales Cyber Solutions Belgium, we strive for security & privacy.” Source: RevenueBase Database · checked Sep 3, 2026
8	The Security Factory	Partial evidence	Niel, BelgiumHQ checked Sep 3, 2026	11-50	19 contacts →
	Partial evidence “The main goal of the Security Factory is to test/assess the current security maturity level of clients.” Source: RevenueBase Database · checked Sep 3, 2026
9	Actwise	Partial evidence	Kontich, BelgiumHQ checked Sep 3, 2026	11-50	18 contacts →
	Partial evidence “ActWise is the partner of choice for securing your identities and protecting what matters most within your company.” Source: RevenueBase Database · checked Sep 3, 2026
10	Redsystem	Indirect evidence	Froyennes, BelgiumHQ checked Sep 3, 2026	11-50	18 contacts →
	Indirect evidence “Our mission is to advise and support you in minimizing the attack surface that could threaten your business.” Source: RevenueBase Database · checked Sep 3, 2026
11	MCG	Indirect evidence	Ottignies-Louvain-La-Neuve, BelgiumHQ checked Sep 3, 2026	1-10	16 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 3, 2026
12	Easi Network	Indirect evidence	Vise, BelgiumHQ checked Sep 3, 2026	1-10	11 contacts →
	Indirect evidence “EASI Network : Société de services et de conseils active dans les réseaux informatiques, IoT et télécoms à destination des entreprises et des institutions.” Source: RevenueBase Database · checked Sep 3, 2026
13	Splynter	Indirect evidence	Kontich, BelgiumHQ checked Sep 3, 2026	1-10	10 contacts →
	Indirect evidence “At Splynter we want to help companies understand their adversaries and how to combat them.” Source: RevenueBase Database · checked Sep 3, 2026
14	Soterics, Your End-To-End Partner In OT Security	Indirect evidence	Kontich, BelgiumHQ checked Sep 3, 2026	11-50	10 contacts →
	Indirect evidence “Soterics is more than a service provider.” Source: RevenueBase Database · checked Sep 3, 2026
15	Curios	Indirect evidence	BelgiumHQ checked Sep 3, 2026	1-10	10 contacts →
	Indirect evidence “Curiosity is a powerful force.” Source: RevenueBase Database · checked Sep 3, 2026
16	Netcure	Indirect evidence	Zaventem, BelgiumHQ checked Sep 3, 2026	1-10	9 contacts →
	Indirect evidence “In a world where everything is connected and people are online all the time, data and resources are distributed and mobile.” Source: RevenueBase Database · checked Sep 3, 2026
17	Brand Solutions Europe	Indirect evidence	Sint-niklaas, BelgiumHQ checked Sep 3, 2026	1-10	8 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 3, 2026
18	4net	Indirect evidence	Mechelen, BelgiumHQ checked Sep 3, 2026	11-50	7 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 3, 2026
19	Xcellerate	Partial evidence	Zwevezele, BelgiumHQ checked Sep 3, 2026	1-10	7 contacts →
	Partial evidence “IT-infrastructuur & cybersecurity NIS2 compliance advies 24/7 monitoring & response Bedrijfskritische continuïteit Transformeren uw IT van risicofactor naar concurrentievoordeel.” Source: RevenueBase Database · checked Sep 3, 2026
20	Fox&fish Cyberdefense	Indirect evidence	Aarschot, BelgiumHQ checked Sep 3, 2026	1-10	6 contacts →
	Indirect evidence “Bij Fox & Fish Cyberdefense werken we op vier domeinen om uw organisatie te beveiligen tegen hacking en cyberaanvallen- Cybersecurity audits & risicoanalyses - Bewustmaking &…” Source: RevenueBase Database · checked Sep 3, 2026
21	Cyberplan	Indirect evidence	Oostkamp, BelgiumHQ checked Sep 3, 2026	11-50	6 contacts →
	Indirect evidence “Wij geloven dat cybersecurity niet zo complex hoeft te zijn.” Source: RevenueBase Database · checked Sep 3, 2026
22	Defend-Ot	Indirect evidence	Kampenhout, BelgiumHQ checked Sep 3, 2026	1-10	6 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 3, 2026
23	Focal Point SRL	Partial evidence	BelgiumHQ checked Sep 3, 2026	11-50	6 contacts →
	Partial evidence “At Focal Point, we specialise in cyber defence capability development, cyber resilience, and operational readiness, helping governments, SOCs, and critical infrastructure…” Source: RevenueBase Database · checked Sep 3, 2026
24	Atendo I Secure	Partial evidence	Paal-Beringen, BelgiumHQ checked Sep 3, 2026	1-10	6 contacts →
	Partial evidence “Highly skilled IT consultants with focus on network & security.” Source: RevenueBase Database · checked Sep 3, 2026
25	Venerit	Indirect evidence	Dendermonde, BelgiumHQ checked Sep 3, 2026	1-10	6 contacts →
	Indirect evidence “Venerit- beveiligt en beschermt het netwerk en de data van jouw kmo voor cyberaanvallen- stelt je (internationale) netwerk op punt en vereenvoudigt het beheer zodat je dat…” Source: RevenueBase Database · checked Sep 3, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: infrastructure security companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names infrastructure security companies.
Partial evidence: Its own public description names part of infrastructure security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure security companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 159 infrastructure security companies based in Belgium

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Infrastructure security companies based in Belgium at a glance

As of Sep 3, 2026

53.0%Verified-email coverage

1.8%Mobile-number coverage

28.9Average contacts per company

1-10Median size (employees)

6.9%Largest-city concentration · Brussels

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

118

11-50

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

15031–60

1,42361–90

84490–180

14180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among infrastructure security companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Belgium whose own description of what they do matches “infrastructure security companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names infrastructure security companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among infrastructure security companies, and records with no verified work email. Companies headquartered outside Belgium are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 2,431 across the full list. 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 3, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names infrastructure security companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many infrastructure security companies are there based in Belgium?

RevenueBase identified 159 infrastructure security companies headquartered in Belgium as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Approach Cyber, headquartered in Mechelen, tops this list with the largest team on record.

Which city has the most infrastructure security companies?

Brussels leads with 11 headquartered companies, followed by Antwerp (7) and Kontich (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,431 verified decision-maker contacts tracked across these 159 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 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 Smart Search, 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.