Company lists · Data refreshed September 2026

Top 25 Tx cybersecurity companies based in Belgium

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 107 companies tracked

RevenueBase identified 107 tx cybersecurity companies headquartered in Belgium as of September 2026 and tracks 1,013 professional contacts across them, including 456 with verified work emails. Brussels is the largest hub.

This list covers tx cybersecurity 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 21, 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 21, 2026 86% judged on-target in blind review

107Companies

1,013Contacts tracked

456Verified emails

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The 25 largest tx cybersecurity companies based in Belgium

Ranked by team size

Top 25 of 107 tx cybersecurity companies based in Belgium, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to tx cybersecurity 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	Nviso Security	Indirect evidence	Brussels, BelgiumHQ checked Sep 21, 2026	201-500	315 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
2	Secutec	Partial evidence	Aartselaar, BelgiumHQ checked Sep 21, 2026	51-200	102 contacts →
	Partial evidence “Cybersecurity company Secutec was founded in 2005 and is considered an authority in the field of cybersecurity, threat intelligence, and incident response services tailored to…” Source: RevenueBase Database · checked Sep 21, 2026
3	Approach Cyber	Indirect evidence	Mont-saint-guibert, BelgiumHQ checked Sep 21, 2026	51-200	88 contacts →
	Indirect evidence “Approach Cyber is a trusted cyber resilience partner supporting organizations across Belgium and Switzerland.” Source: RevenueBase Database · checked Sep 21, 2026
4	ACEN	Partial evidence	Kontich, BelgiumHQ checked Sep 21, 2026	51-200	51 contacts →
	Partial evidence “Tailored, end-to-end solutions, suited to your cybersecurity needs.” Source: RevenueBase Database · checked Sep 21, 2026
5	Secwise	Indirect evidence	Leuven, BelgiumHQ checked Sep 21, 2026	11-50	28 contacts →
	Indirect 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 21, 2026
6	Sertalink	Partial evidence	St-niklaas, BelgiumHQ checked Sep 21, 2026	11-50	28 contacts →
	Partial 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 21, 2026
7	Thales Cyber Solutions Belgium	Indirect evidence	BelgiumHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “At Thales Cyber Solutions Belgium, we strive for security & privacy.” Source: RevenueBase Database · checked Sep 21, 2026
8	Cresco Cybersecurity	Partial evidence	Belgium France Luxembourg Netherlands, BelgiumHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “Cresco is your partner in cybersecurity.” Source: RevenueBase Database · checked Sep 21, 2026
9	Resilient Security	Partial evidence	Antwerp, BelgiumHQ checked Sep 21, 2026	11-50	18 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 21, 2026
10	Actwise, An Acen Company	Indirect evidence	Kontich, BelgiumHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “ActWise is the partner of choice for securing your identities and protecting what matters most within your company.” Source: RevenueBase Database · checked Sep 21, 2026
11	Redsystem	Indirect evidence	Froyennes, BelgiumHQ checked Sep 21, 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 21, 2026
12	MCG	Indirect evidence	Ottignies-louvain-la-neuve, BelgiumHQ checked Sep 21, 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 21, 2026
13	Curios	Partial evidence	Antwerp, BelgiumHQ checked Sep 21, 2026	1-10	10 contacts →
	Partial evidence “Curios is a boutique cybersecurity and compliance consultancy in Antwerp, serving enterprises across Belgium and Europe.” Source: RevenueBase Database · checked Sep 21, 2026
14	Splynter	Indirect evidence	Kontich, BelgiumHQ checked Sep 21, 2026	1-10	8 contacts →
	Indirect evidence “At Splynter we want to help companies understand their adversaries and how to combat them.” Source: RevenueBase Database · checked Sep 21, 2026
15	Brand Solutions Europe	Partial evidence	Sint-niklaas, BelgiumHQ checked Sep 21, 2026	1-10	8 contacts →
	Partial 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 21, 2026
16	Cyberplan	Partial evidence	Oostkamp, BelgiumHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “Wij geloven dat cybersecurity niet zo complex hoeft te zijn.” Source: RevenueBase Database · checked Sep 21, 2026
17	Venerit	Indirect evidence	Dendermonde, BelgiumHQ checked Sep 21, 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 21, 2026
18	Resilix	Indirect evidence	Hasselt, BelgiumHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “At Resilix, we focus on providing targeted security solutions designed from a pragmatic approach to best protect your organisation from today's complex threats.” Source: RevenueBase Database · checked Sep 21, 2026
19	Guardis	Indirect evidence	Hannut, BelgiumHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “Guardis helps organizations design, secure and operate their IT infrastructure, from cloud-native environments to industrial systems.” Source: RevenueBase Database · checked Sep 21, 2026
20	Apex Networks	Indirect evidence	Wingene, BelgiumHQ checked Sep 21, 2026	1-10	4 contacts →
	Indirect evidence “Een goed werkend netwerk is voor elk bedrijf van cruciaal belang.” Source: RevenueBase Database · checked Sep 21, 2026
21	Dashan	Indirect evidence	Tournai, BelgiumHQ checked Sep 21, 2026	1-10	4 contacts →
	Indirect evidence “Détecter, Analyser, Former.” Source: RevenueBase Database · checked Sep 21, 2026
22	Icteryus	Indirect evidence	Gentbrugge, BelgiumHQ checked Sep 21, 2026	1-10	4 contacts →
	Indirect evidence “To protect global enterprises from emerging cyber security threats by delivering reliable and transparent services around the clock.” Source: RevenueBase Database · checked Sep 21, 2026
23	Infosec4you	Indirect evidence	Bruxelles Bruxelles, BelgiumHQ checked Sep 21, 2026	11-50	3 contacts →
	Indirect evidence “INFOSEC4YOU est une Start-up spécialisée exclusivement dans la cybersécurité, nous protégeons les données, les entreprises et les citoyens contre la cybercriminalité et les…” Source: RevenueBase Database · checked Sep 21, 2026
24	Cybervalue	Indirect evidence	Leuven, BelgiumHQ checked Sep 21, 2026	1-10	3 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
25	Qfirst	Indirect evidence	Bilzen, BelgiumHQ checked Sep 21, 2026	1-10	3 contacts →
	Indirect evidence “Qfirst helps companies to protect their data through both technical solutions and by applying cyber security processes and frameworks to their processes and their IT…” Source: RevenueBase Database · checked Sep 21, 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: tx cybersecurity 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 tx cybersecurity companies.
Partial evidence: Its own public description names part of tx cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tx cybersecurity 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 107 tx cybersecurity companies based in Belgium

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Tx cybersecurity companies based in Belgium at a glance

As of Sep 21, 2026

45.0%Verified-email coverage

9.5Average contacts per company

1-10Median size (employees)

6.5%Largest-city concentration · Brussels

Sep 21, 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 107 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 tx cybersecurity 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 “tx cybersecurity 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 tx cybersecurity 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 tx cybersecurity 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, 456 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 21, 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 tx cybersecurity 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 tx cybersecurity companies are there based in Belgium?

RevenueBase identified 107 tx cybersecurity 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?

Nviso Security, headquartered in Belgium, tops this list with the largest team on record.

Which city has the most tx cybersecurity companies?

Brussels leads with 7 headquartered companies, followed by Kontich (5) and Antwerp (4).

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 456 verified decision-maker contacts tracked across these 107 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 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 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.