Company lists · Data verified August 2026

Top 25 Application security testing companies based in the Netherlands

Name: Application security testing companies based in the Netherlands
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 120 companies tracked

There are 120 application security testing companies headquartered in the Netherlands (RevenueBase, August 2026). RevenueBase tracks 878 professional contacts across them, including 286 with verified work emails and 63 with mobile numbers. Amsterdam is the largest hub.

This list covers application security testing companies headquartered in the Netherlands, 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.

120Companies

878Contacts tracked

286Verified emails

63Mobile numbers

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The 25 largest application security testing companies based in the Netherlands

Ranked by team size

Top 25 of 120 application security testing companies based in the Netherlands, 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	Comsec	Amsterdam	51-200	140	17
2	Breachlock, INC	Amsterdam	51-200	136	29
3	Spritecloud	Amsterdam	51-200	63	26
4	Securify	Ca	11-50	38	27
5	Surelock IT Security Services	Woerden	11-50	37	33
6	Zerocopter	Ra	11-50	36	9
7	Riscure	Xj	51-200	25	19
8	LBVD	Delft	11-50	24	5
9	Dongit	Xc	11-50	18	11
10	Reqon B.V	Leiderdorp	11-50	16	11
11	Base Cyber Security	Ak	11-50	14	3
12	Sirius Security	Bj	1-10	12	3
13	Whitehats B.V	Ae	11-50	11	8
14	Secwatch B.V	Almere	11-50	11	8
15	Cyber Cloud	Bleskensgraaf	1-10	10	8
16	Linksecure	Vj	1-10	10	6
17	ONVIO	Gv	11-50	9	5
18	Qualityhouse	Ll	51-200	9	1
19	Attic Security	Cj	11-50	7	5
20	Hackdefense	Leiden	11-50	7	2
21	Seclinq	Zb	1-10	7	2
22	Websec B.V	Cd	11-50	7	1
23	Symmetry Cyber Intelligence	Amsterdam	1-10	6	3
24	Blueprint Cyber Security	The Hague	11-50	6	1
25	Secured By Design	Eb	11-50	6	1

Showing 25 of 120 application security testing companies based in the Netherlands

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Application security testing companies based in the Netherlands at a glance

As of Aug 28, 2026

1-10Median size (employees)

AmsterdamLargest hub · 25 HQs

63Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Application security testing companies by metro

Metro	Companies
Application security testing companies in Amsterdam	25
Application security testing companies in The Hague	4
Application security testing companies in Rotterdam	4
Application security testing companies in Delft	3
Application security testing companies in Eindhoven	3
Application security testing companies in Groningen	3
Application security testing companies in Utrecht	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 “application security testing companies”, with match quality audited by blind human judging, and headquartered in the Netherlands.
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 testing companies are there based in the Netherlands?

There are 120 application security testing companies headquartered in the Netherlands as of August 2026 (RevenueBase).

What is the largest company on this list?

Comsec, headquartered in Amsterdam, tops this list with the largest team on record.

Which city has the most application security testing companies?

Amsterdam leads with 25 headquartered companies, followed by The Hague (4) and Rotterdam (4).

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 286 verified decision-maker contacts tracked across these 120 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.