Company lists · Data verified August 2026

Top 25 Cybersecurity defense contractors based in Belgium

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 143 companies tracked

There are 143 cybersecurity defense contractors headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 8,030 professional contacts across them, including 2,433 with verified work emails and 326 with mobile numbers. Brussels is the largest hub.

This list covers cybersecurity defense contractors 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.

143Companies

8,030Contacts tracked

2,433Verified emails

326Mobile numbers

Unlock all 143 companies Free account · no credit card · 2 minutes

The 25 largest cybersecurity defense contractors based in Belgium

Ranked by team size

Top 25 of 143 cybersecurity defense contractors 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	Terma Group	n/a	1,001-5,000	1,522	50
3	Approach Cyber	Mechelen	51-200	93	48
4	Xalient Benelux	Asse	201-500	74	53
5	ACEN	Kontich	51-200	50	30
6	Secwise	Leuven	11-50	29	19
7	Sertalink	Belsele	11-50	27	13
8	Upright Security	Kontich	11-50	21	13
9	Resilient Security	n/a	11-50	20	14
10	Thales Cyber Solutions Belgium	n/a	11-50	20	1
11	Actwise	Kontich	11-50	18	10
12	Redsystem	Froyennes	11-50	18	7
13	MCG	Ottignies-Louvain-La-Neuve	1-10	16	8
14	Splynter	Kontich	1-10	10	8
15	Curios	n/a	1-10	10	4
16	Netcure	Zaventem	1-10	9	7
17	Brand Solutions Europe	Sint-Niklaas	1-10	8	4
18	Cyberplan	Oostkamp	11-50	6	4
19	Defend-Ot	Kampenhout	1-10	6	4
20	Focal Point SRL	n/a	11-50	6	3
21	Atendo I Secure	Paal-Beringen	1-10	6	2
22	Guardis	Hannut	1-10	5	2
23	Apex Networks	Wingene	1-10	4	3
24	Safepoint	Zoutleeuw	1-10	4	2
25	Icteryus	Gentbrugge	1-10	4	2

Showing 25 of 143 cybersecurity defense contractors based in Belgium

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,433 reachable decision-makers.

Free account · no credit card

See all 143 companies

Cybersecurity defense contractors based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

BrusselsLargest hub · 11 HQs

326Contacts with mobile numbers

4Emails re-verified in last 30 days

Companies by employee count

1-10

103

11-50

51-200

201-500

1,001-5,000

Cybersecurity defense contractors by metro

Metro	Companies
Cybersecurity defense contractors in Brussels	11
Cybersecurity defense contractors in Antwerp	8
Cybersecurity defense contractors in Kontich	6
Cybersecurity defense contractors in Antwerpen	4
Cybersecurity defense contractors in Sint-Niklaas	2
Cybersecurity defense contractors in Mechelen	2
Cybersecurity defense contractors in Gent	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 defense contractors”, 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; 4 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 defense contractors are there based in Belgium?

There are 143 cybersecurity defense contractors 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 cybersecurity defense contractors?

Brussels leads with 11 headquartered companies, followed by Antwerp (8) and Kontich (6).

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 2,433 verified decision-maker contacts tracked across these 143 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.

Ready to reach these companies? Verified emails and direct dials for all 143 cybersecurity defense contractors based in Belgium. Start with a free account, no credit card.

Get the full list

Related lists

Cybersecurity defense contractors by geography

Browse the directory

Browse: Companies home · All Belgium lists · All Cybersecurity defense contractors lists · New lists

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.