Company lists · Data verified August 2026

Top 25 Cybersecurity startups based in Belgium

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 163 companies tracked

There are 163 cybersecurity startups headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 4,707 professional contacts across them, including 2,511 with verified work emails and 88 with mobile numbers. Brussels is the largest hub.

This list covers cybersecurity startups 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.

163Companies

4,707Contacts tracked

2,511Verified emails

88Mobile numbers

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The 25 largest cybersecurity startups based in Belgium

Ranked by team size

Top 25 of 163 cybersecurity startups 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	Approach Cyber	Mechelen	51-200	93	48
3	Phished	Leuven	11-50	76	55
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	Fichet Security Solutions Belgium & The Netherlands	Zaventem	51-200	25	11
9	Jimber	Oostkamp	11-50	21	13
10	Upright Security	Kontich	11-50	21	13
11	Resilient Security	n/a	11-50	20	14
12	Nomios Belgium	Zaventem	11-50	20	13
13	Thales Cyber Solutions Belgium	n/a	11-50	20	1
14	Actwise	Kontich	11-50	18	10
15	Redsystem	Froyennes	11-50	18	7
16	MCG	Ottignies-Louvain-La-Neuve	1-10	16	8
17	Splynter	Kontich	1-10	10	8
18	Soterics, Your End-To-End Partner In OT Security	Kontich	11-50	10	4
19	Curios	n/a	1-10	10	4
20	Netcure	Zaventem	1-10	9	7
21	Outpost24 Benelux Ex-Sweepatic	Leuven	11-50	8	4
22	Brand Solutions Europe	Sint-Niklaas	1-10	8	4
23	4net	Mechelen	11-50	7	5
24	Cyberplan	Oostkamp	11-50	6	4
25	Defend-Ot	Kampenhout	1-10	6	4

Showing 25 of 163 cybersecurity startups based in Belgium

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Cybersecurity startups based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

BrusselsLargest hub · 8 HQs

88Contacts with mobile numbers

4Emails re-verified in last 30 days

Companies by employee count

1-10

118

11-50

51-200

201-500

1,001-5,000

Cybersecurity startups by metro

Metro	Companies
Cybersecurity startups in Brussels	8
Cybersecurity startups in Kontich	8
Cybersecurity startups in Antwerp	6
Cybersecurity startups in Mechelen	4
Cybersecurity startups in Antwerpen	4
Cybersecurity startups in Leuven	4
Cybersecurity startups in Gent	3

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 startups”, 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 startups are there based in Belgium?

There are 163 cybersecurity startups 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 startups?

Brussels leads with 8 headquartered companies, followed by Kontich (8) and Antwerp (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 2,511 verified decision-maker contacts tracked across these 163 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.