Company lists · Data verified August 2026

Top 20 Computer security companies based in Belgium

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 44 companies tracked

There are 44 computer security companies headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 3,963 professional contacts across them, including 2,155 with verified work emails and 64 with mobile numbers. Sint-Niklaas is the largest hub.

This list covers computer security companies headquartered in Belgium, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

44Companies

3,963Contacts tracked

2,155Verified emails

64Mobile numbers

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The 20 largest computer security companies based in Belgium

Ranked by team size

Top 20 of 44 computer security companies based in Belgium, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Orange Cyberdefense	n/a	1,001-5,000	3,706	2,083
2	Sertalink	Belsele	11-50	27	13
3	Jimber	Oostkamp	11-50	21	13
4	Thales Cyber Solutions Belgium	n/a	11-50	20	1
5	Actwise	Kontich	11-50	18	10
6	MCG	Ottignies-Louvain-La-Neuve	1-10	16	8
7	Brand Solutions Europe	Sint-Niklaas	1-10	8	4
8	Resilix	n/a	1-10	5	3
9	Apex Networks	Wingene	1-10	4	3
10	Icteryus	Gentbrugge	1-10	4	2
11	Dashan	Tournai	1-10	4	2
12	Infosec4you	Bruxelles Bruxelles	11-50	3	2
13	OZOOS	Waterloo	1-10	3	2
14	Juve Consulting	Landen	1-10	3	1
15	Threatproof	n/a	11-50	2	2
16	Kemsec	Vilvoorde	1-10	2	2
17	Layer 9 Networks	Sint-Amandsberg	1-10	2	1
18	Flowz-It Cyberprotection For Smes	n/a	1-10	1	1
19	Cyberinit	Waremme	1-10	1	1
20	Cosmonet Sprl	Bruxelles	1-10	1	1

Showing 20 of 44 computer security companies based in Belgium

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Computer security companies based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

Sint-NiklaasLargest hub · 2 HQs

64Contacts with mobile numbers

7Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

201-500

1,001-5,000

Computer security companies by metro

Metro	Companies
Computer security companies in Sint-Niklaas	2
Computer security companies in Waterloo	2
Computer security companies in Bruxelles	2
Computer security companies in Mont-Saint-Guibert	2
Computer security companies in Brussels	2
Computer security companies in Landen	1
Computer security companies in Sint-Amandsberg	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “computer security companies”, with match quality audited by blind human judging, and headquartered in Belgium.
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: Contact records re-verify on a rolling cadence; 7 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many computer security companies are there based in Belgium?

There are 44 computer security companies headquartered in Belgium as of August 2026 (RevenueBase).

What is the largest company on this list?

Orange Cyberdefense, headquartered in Belgium, tops this list with the largest team on record.

Which city has the most computer security companies?

Sint-Niklaas leads with 2 headquartered companies, followed by Waterloo (2) and Bruxelles (2).

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 2,155 verified decision-maker contacts tracked across these 44 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.