Company lists · Data refreshed September 2026

Top 25 Critical infrastructure protection companies based in Belgium

Name: Critical infrastructure protection companies based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 57 companies tracked

RevenueBase identified 57 critical infrastructure protection companies headquartered in Belgium as of September 2026 and tracks 1,424 professional contacts across them, including 222 with verified work emails. Turnhout is the largest hub.

This list covers critical infrastructure protection 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 19, 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 19, 2026 86% judged on-target in blind review

57Companies

1,424Contacts tracked

222Verified emails

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The 25 largest critical infrastructure protection companies based in Belgium

Ranked by team size

Top 25 of 57 critical infrastructure protection companies based in Belgium, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to critical infrastructure protection 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	Seris Belgium	Indirect evidence	Diegem, BelgiumHQ checked Sep 19, 2026	1,001-5,000	1,014 contacts →
	Indirect evidence “SERIS Security is a modern company that offers companies, governments and private customers a Total Security-solution through a creative and pioneering philosophy.” Source: RevenueBase Database · checked Sep 19, 2026
2	Sertalink	Indirect evidence	St-niklaas, BelgiumHQ checked Sep 19, 2026	11-50	28 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 19, 2026
3	Fichet Security Solutions Belgium & The Netherlands	Indirect evidence	Zaventem, BelgiumHQ checked Sep 19, 2026	51-200	25 contacts →
	Indirect evidence “Mastering your own security empowers you to create a safer world for everyone.” Source: RevenueBase Database · checked Sep 19, 2026
4	Thales Cyber Solutions Belgium	Indirect evidence	BelgiumHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “At Thales Cyber Solutions Belgium, we strive for security & privacy.” Source: RevenueBase Database · checked Sep 19, 2026
5	RST Consultancy	Indirect evidence	Turnhout, BelgiumHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “RST consultancy guides your company to the desired level of security.” Source: RevenueBase Database · checked Sep 19, 2026
6	Centry Global	Indirect evidence	Geraardsbergen, BelgiumHQ checked Sep 19, 2026	11-50	12 contacts →
	Indirect evidence “Operating in 90+ countries • Intelligence & Investigations provided by 100+ field agents • Offices in 8 countries • Client property protected: 1mln square miles Centry Global…” Source: RevenueBase Database · checked Sep 19, 2026
7	Soterics, Your End-To-End Partner In OT Security	Indirect evidence	Kontich, BelgiumHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “Soterics is more than a service provider.” Source: RevenueBase Database · checked Sep 19, 2026
8	Curios	Indirect evidence	Antwerp, BelgiumHQ checked Sep 19, 2026	1-10	10 contacts →
	Indirect evidence “Curios is a boutique cybersecurity and compliance consultancy in Antwerp, serving enterprises across Belgium and Europe.” Source: RevenueBase Database · checked Sep 19, 2026
9	Netcure	Indirect evidence	Zaventem, BelgiumHQ checked Sep 19, 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 19, 2026
10	Pitagone SA - NV	Indirect evidence	Bruxelles, BelgiumHQ checked Sep 19, 2026	1-10	7 contacts →
	Indirect evidence “PITAGONE est le leader européen de la gestion de la menace; principalement active dans les domaines de l’Aviation, des Ports, des Transports Publics, des Agences Fédérales, des…” Source: RevenueBase Database · checked Sep 19, 2026
11	Defend-Ot	Partial evidence	Kampenhout, BelgiumHQ checked Sep 19, 2026	1-10	6 contacts →
	Partial 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 19, 2026
12	Idsecurity	Indirect evidence	Rixensart, BelgiumHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “IDSecurity est un intégrateur de solution de sécurité pour professionnels et particuliers.” Source: RevenueBase Database · checked Sep 19, 2026
13	Atendo I Secure	Indirect evidence	Paal-beringen, BelgiumHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “Highly skilled IT consultants with focus on network & security.” Source: RevenueBase Database · checked Sep 19, 2026
14	S.A.F.E	Indirect evidence	Aarschot, BelgiumHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “We help you protect your people, data and operations by delivering integrated consultancy, expert training and engineered solutions that safeguard your organisation from modern…” Source: RevenueBase Database · checked Sep 19, 2026
15	Guardis	Partial evidence	Hannut, BelgiumHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “Guardis helps organizations design, secure and operate their IT infrastructure, from cloud-native environments to industrial systems.” Source: RevenueBase Database · checked Sep 19, 2026
16	Apex Networks	Indirect evidence	Wingene, BelgiumHQ checked Sep 19, 2026	1-10	4 contacts →
	Indirect evidence “Een goed werkend netwerk is voor elk bedrijf van cruciaal belang.” Source: RevenueBase Database · checked Sep 19, 2026
17	Scope Security Solutions	Indirect evidence	Turnhout, BelgiumHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “SCOPE is a pioneer as an advisor in the security world.” Source: RevenueBase Database · checked Sep 19, 2026
18	Claireity Consulting	Indirect evidence	Brussels, BelgiumHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “Claireity Consulting: Cybersecurity Reimagined At Claireity Consulting, we blend the art of security with the precision of technology to safeguard your digital journey.” Source: RevenueBase Database · checked Sep 19, 2026
19	Opsman Consulting	Indirect evidence	Namur, BelgiumHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “Plus de 25 ans d’expertise pour sécuriser vos personnes, vos biens et votre réputation Depuis 1997, Christophe Samyn, fondateur de l'entreprise, est actif dans la gestion des…” Source: RevenueBase Database · checked Sep 19, 2026
20	Odsc Sprl	Indirect evidence	Namur, BelgiumHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “Chez ODSC, nous accompagnons les entreprises dans la sécurisation de leurs actifs numériques à travers une approche complète et humaine de la cybersécurité.” Source: RevenueBase Database · checked Sep 19, 2026
21	YGQ Solutions	Indirect evidence	Heusden-zolder, BelgiumHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “YGQ Solutions stands for security solutions and services across the world, based upon the needs of the client and explained in an understandable language, this with a touch of fun…” Source: RevenueBase Database · checked Sep 19, 2026
22	Securenza	Indirect evidence	Genk, BelgiumHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “We aim to improve the overall security posture and security practices of our clients.” Source: RevenueBase Database · checked Sep 19, 2026
23	Otes Security	Indirect evidence	Grimbergen, BelgiumHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “OTES Security ondersteunt particulieren, bedrijven en openbare besturen in het adviseren, het uittekenen en het implementeren van een totaal beveiligingsplan op maat.” Source: RevenueBase Database · checked Sep 19, 2026
24	Alterfire	Indirect evidence	Antwerp, BelgiumHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “I am a multi-skilled IT and Security Engineer with a solid background in networking, security and architecture, and hands on network and security support across multiple…” Source: RevenueBase Database · checked Sep 19, 2026
25	Secudea BV	Indirect evidence	Roeselare, BelgiumHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “Bringing ICS/SCADA/OT security ideas to life Secudea bv aims to provide its security services, knowledge and expertise to organisations active within or having an ICS/SCADA/OT…” Source: RevenueBase Database · checked Sep 19, 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: critical infrastructure protection 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 critical infrastructure protection companies.
Partial evidence: Its own public description names part of critical infrastructure protection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name critical infrastructure protection 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 57 critical infrastructure protection companies based in Belgium

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Critical infrastructure protection companies based in Belgium at a glance

As of Sep 19, 2026

15.6%Verified-email coverage

25.0Average contacts per company

1-10Median size (employees)

7.0%Largest-city concentration · Turnhout

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 57 companies.

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 critical infrastructure protection 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 “critical infrastructure protection 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 critical infrastructure protection 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 critical infrastructure protection 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, 222 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 19, 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 critical infrastructure protection 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 critical infrastructure protection companies are there based in Belgium?

RevenueBase identified 57 critical infrastructure protection 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?

Seris Belgium, headquartered in Diegem, tops this list with the largest team on record.

Which city has the most critical infrastructure protection companies?

Turnhout leads with 4 headquartered companies, followed by Antwerp (3) and Brussels (3).

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 222 verified decision-maker contacts tracked across these 57 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 19, 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.