Company lists · Data verified August 2026

Top 20 Application security consulting firms based in Belgium

Name: Application security consulting firms based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 56 companies tracked

There are 56 application security consulting firms headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 244 professional contacts across them, including 79 with verified work emails and 11 with mobile numbers. Brussels is the largest hub.

This list covers application security consulting 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.

56Companies

244Contacts tracked

79Verified emails

11Mobile numbers

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The 20 largest application security consulting firms based in Belgium

Ranked by team size

Top 20 of 56 application security consulting 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	Toreon	Antwerpen	51-200	67	43
2	The Security Factory	Niel	11-50	19	12
3	Atendo I Secure	Paal-Beringen	1-10	6	2
4	Sectricity Outsmart Hackers	Belgium Netherlands	1-10	5	3
5	Guardis	Hannut	1-10	5	2
6	Cybervalue	Leuven	1-10	3	2
7	Topware Systems	Tienen	1-10	3	1
8	Robrechts & Thienpont	Turnhout	1-10	2	2
9	Odsc Sprl	Namur	1-10	2	1
10	Cybernoob	n/a	1-10	1	1
11	Blue Canary	Bruges	1-10	1	1
12	RED Fuse Security	Le Roeulx	1-10	1	1
13	Alterfire	Antwerp	1-10	1	1
14	Aniva Consulting BV	Sint-Truiden	1-10	1	1
15	Styx Consulting	Florenville	1-10	1	1
16	Onerule	Mechelen	1-10	1	1
17	Achillex BV	Brussels	1-10	1	1
18	Shift Left Security	Leuven	1-10	1	1
19	Valcke BV	Kortrijk	1-10	1	1
20	Cimind	Kruibeke	n/a	1	1

Showing 20 of 56 application security consulting firms based in Belgium

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Application security consulting firms based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

BrusselsLargest hub · 4 HQs

11Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Application security consulting firms by metro

Metro	Companies
Application security consulting firms in Brussels	4
Application security consulting firms in Turnhout	2
Application security consulting firms in Erpe-Mere	2
Application security consulting firms in Antwerp	2
Application security consulting firms in Leuven	2
Application security consulting firms in Brussel	2
Application security consulting firms in Ciney	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 “application security consulting 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 application security consulting firms are there based in Belgium?

There are 56 application security consulting firms headquartered in Belgium as of August 2026 (RevenueBase).

What is the largest company on this list?

Toreon, headquartered in Antwerpen, tops this list with the largest team on record.

Which city has the most application security consulting firms?

Brussels leads with 4 headquartered companies, followed by Turnhout (2) and Erpe-Mere (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 79 verified decision-maker contacts tracked across these 56 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.