Company lists · Data verified August 2026

Top 25 Cybersecurity incident response firms based in Belgium

Name: Cybersecurity incident response firms based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 84 companies tracked

There are 84 cybersecurity incident response firms headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 2,493 professional contacts across them, including 157 with verified work emails and 189 with mobile numbers. Antwerp is the largest hub.

This list covers cybersecurity incident response firms 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.

84Companies

2,493Contacts tracked

157Verified emails

189Mobile numbers

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The 25 largest cybersecurity incident response firms based in Belgium

Ranked by team size

Top 25 of 84 cybersecurity incident response firms 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	Approach Cyber	Mechelen	51-200	93	48
2	Sertalink	Belsele	11-50	27	13
3	Resilient Security	n/a	11-50	20	14
4	Thales Cyber Solutions Belgium	n/a	11-50	20	1
5	Actwise	Kontich	11-50	18	10
6	Redsystem	Froyennes	11-50	18	7
7	MCG	Ottignies-Louvain-La-Neuve	1-10	16	8
8	Cert A Department Of The Centre For Cybersecurity Belgium	Brussels	51-200	13	9
9	Splynter	Kontich	1-10	10	8
10	Curios	n/a	1-10	10	4
11	Brand Solutions Europe	Sint-Niklaas	1-10	8	4
12	Resilix	n/a	1-10	5	3
13	Guardis	Hannut	1-10	5	2
14	Qfirst Nis2	Bilzen	1-10	4	4
15	Safepoint	Zoutleeuw	1-10	4	2
16	Icteryus	Gentbrugge	1-10	4	2
17	Dashan	Tournai	1-10	4	2
18	Infosec4you	Bruxelles Bruxelles	11-50	3	2
19	Cybervalue	Leuven	1-10	3	2
20	Threatproof	n/a	11-50	2	2
21	Odsc Sprl	Namur	1-10	2	1
22	Zerobit BV	Lubbeek	1-10	2	1
23	Blue Canary	Bruges	1-10	1	1
24	Cybertronica	Kontich	1-10	1	1
25	Securenza	Genk	1-10	1	1

Showing 25 of 84 cybersecurity incident response firms based in Belgium

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Cybersecurity incident response firms based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

AntwerpLargest hub · 8 HQs

189Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Cybersecurity incident response firms by metro

Metro	Companies
Cybersecurity incident response firms in Antwerp	8
Cybersecurity incident response firms in Brussels	4
Cybersecurity incident response firms in Kontich	3
Cybersecurity incident response firms in Bilzen	2
Cybersecurity incident response firms in Sint-Niklaas	2
Cybersecurity incident response firms in Mechelen	2
Cybersecurity incident response firms 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 incident response firms”, 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 incident response firms are there based in Belgium?

There are 84 cybersecurity incident response firms headquartered in Belgium as of August 2026 (RevenueBase).

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 cybersecurity incident response firms?

Antwerp leads with 8 headquartered companies, followed by Brussels (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 157 verified decision-maker contacts tracked across these 84 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.