Company lists · Data verified August 2026

Top 25 Application security consulting firms based in the Netherlands

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 136 companies tracked

There are 136 application security consulting firms headquartered in the Netherlands (RevenueBase, August 2026). RevenueBase tracks 781 professional contacts across them, including 281 with verified work emails and 40 with mobile numbers. Amsterdam is the largest hub.

This list covers application security consulting firms 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.

136Companies

781Contacts tracked

281Verified emails

40Mobile numbers

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The 25 largest application security consulting firms based in the Netherlands

Ranked by team size

Top 25 of 136 application security consulting firms 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	Databalance	Re	51-200	60	36
3	Securify	Ca	11-50	38	27
4	Surelock IT Security Services	Woerden	11-50	37	33
5	LBVD	Delft	11-50	24	5
6	Vest Information Security	Al	11-50	23	16
7	Threadstone Cyber Security	Km	11-50	23	13
8	Dongit	Xc	11-50	18	11
9	Reqon B.V	Leiderdorp	11-50	16	11
10	Base Cyber Security	Ak	11-50	14	3
11	Safetech P&r Groep	Jv	11-50	13	1
12	Whitehats B.V	Ae	11-50	11	8
13	Secwatch B.V	Almere	11-50	11	8
14	Cyber Cloud	Bleskensgraaf	1-10	10	8
15	Cert2connect	Ad	1-10	9	7
16	ONVIO	Gv	11-50	9	5
17	Attic Security	Cj	11-50	7	5
18	Hackdefense	Leiden	11-50	7	2
19	Netboss BV	Dx	11-50	6	4
20	Blueprint Cyber Security	The Hague	11-50	6	1
21	FP Security	Pd	1-10	6	1
22	Rootsec	Almere	11-50	5	1
23	Cqure Consulting	Hj	11-50	5	1
24	CREDS	Ad	1-10	4	3
25	Threatlabs	Kp	1-10	4	3

Showing 25 of 136 application security consulting firms based in the Netherlands

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Application security consulting firms based in the Netherlands at a glance

As of Aug 28, 2026

1-10Median size (employees)

AmsterdamLargest hub · 22 HQs

40Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

100

11-50

51-200

Application security consulting firms by metro

Metro	Companies
Application security consulting firms in Amsterdam	22
Application security consulting firms in Rotterdam	5
Application security consulting firms in Eindhoven	4
Application security consulting firms in Groningen	4
Application security consulting firms in Delft	3
Application security consulting firms in Den Haag	3
Application security consulting firms in Almere	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 consulting firms”, 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 consulting firms are there based in the Netherlands?

There are 136 application security consulting firms 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 consulting firms?

Amsterdam leads with 22 headquartered companies, followed by Rotterdam (5) and Eindhoven (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 281 verified decision-maker contacts tracked across these 136 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.