Company lists · Data verified August 2026

Top 23 Cybersecurity audit companies based in Belgium

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 107 companies tracked

There are 107 cybersecurity audit companies headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 428 professional contacts across them, including 105 with verified work emails and 17 with mobile numbers. Brussels is the largest hub.

This list covers cybersecurity audit 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.

107Companies

428Contacts tracked

105Verified emails

17Mobile numbers

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The 23 largest cybersecurity audit companies based in Belgium

Ranked by team size

Top 23 of 107 cybersecurity audit 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	Sertalink	Belsele	11-50	27	13
2	Resilient Security	n/a	11-50	20	14
3	Thales Cyber Solutions Belgium	n/a	11-50	20	1
4	Actwise	Kontich	11-50	18	10
5	Redsystem	Froyennes	11-50	18	7
6	Curios	n/a	1-10	10	4
7	Brand Solutions Europe	Sint-Niklaas	1-10	8	4
8	Fox&fish Cyberdefense	Aarschot	1-10	6	5
9	Cyberplan	Oostkamp	11-50	6	4
10	Sectricity Outsmart Hackers	Belgium Netherlands	1-10	5	3
11	Guardis	Hannut	1-10	5	2
12	Qfirst Nis2	Bilzen	1-10	4	4
13	Soteria	Ghent	1-10	4	3
14	Icteryus	Gentbrugge	1-10	4	2
15	Cybervalue	Leuven	1-10	3	2
16	Threatproof	n/a	11-50	2	2
17	Zerobit BV	Lubbeek	1-10	2	1
18	Odsc Sprl	Namur	1-10	2	1
19	Cybernoob	n/a	1-10	1	1
20	Blue Canary	Bruges	1-10	1	1
21	Flowz-It Cyberprotection For Smes	n/a	1-10	1	1
22	Securenza	Genk	1-10	1	1
23	Cyberxpert	Antwerpen	1-10	1	1

Showing 23 of 107 cybersecurity audit companies based in Belgium

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Cybersecurity audit companies based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

BrusselsLargest hub · 8 HQs

17Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Cybersecurity audit companies by metro

Metro	Companies
Cybersecurity audit companies in Brussels	8
Cybersecurity audit companies in Antwerp	4
Cybersecurity audit companies in Kontich	3
Cybersecurity audit companies in Antwerpen	3
Cybersecurity audit companies in Erpe-Mere	2
Cybersecurity audit companies in Sint-Niklaas	2
Cybersecurity audit companies in Bruxelles	2

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 “cybersecurity audit 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; 0 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 cybersecurity audit companies are there based in Belgium?

There are 107 cybersecurity audit companies headquartered in Belgium as of August 2026 (RevenueBase).

What is the largest company on this list?

Sertalink, headquartered in Belsele, tops this list with the largest team on record.

Which city has the most cybersecurity audit companies?

Brussels leads with 8 headquartered companies, followed by Antwerp (4) and Kontich (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 105 verified decision-maker contacts tracked across these 107 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.