Company lists · Data refreshed September 2026

Top 25 Enterprise security assessment services based in the Netherlands

Name: Enterprise security assessment services based in the Netherlands
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 212 companies tracked

RevenueBase identified 212 enterprise security assessment services headquartered in the Netherlands as of September 2026 and tracks 1,342 professional contacts across them, including 350 with verified work emails. Amsterdam is the largest hub.

This list covers enterprise security assessment services headquartered in the Netherlands, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

212Companies

1,342Contacts tracked

350Verified emails

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The 25 largest enterprise security assessment services based in the Netherlands

Ranked by team size

Top 25 of 212 enterprise security assessment services based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise security assessment services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Databalance	Indirect evidence	Nieuwkuijk, NetherlandsHQ checked Sep 28, 2026	51-200	60 contacts →
	Indirect evidence “U moet kunnen vertrouwen op de beschikbaarheid en veiligheid van uw bedrijfskritische systemen.” Source: RevenueBase Database · checked Sep 28, 2026
2	Surelock IT Security Services	Partial evidence	3447gg, NetherlandsHQ checked Sep 28, 2026	11-50	37 contacts →
	Partial evidence “Surelock IT Security Services helpt organisatie inzicht te krijgen in de IT-kwetsbaarheden van hun organisatie.” Source: RevenueBase Database · checked Sep 28, 2026
3	LBVD	Partial evidence	Delft, NetherlandsHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “LBVD is een Delfts onderzoeks- en adviesbureau gespecialiseerd in digitale veiligheid, cybersecurity (ICT-security) en informatiebeveiliging, met 20+ jaar ervaring.” Source: RevenueBase Database · checked Sep 28, 2026
4	Threadstone Cyber Security	Indirect evidence	Rotterdam, NetherlandsHQ checked Sep 28, 2026	11-50	23 contacts →
	Indirect evidence “ThreadStone is uw toonaangevende specialist op het gebied van cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026
5	Defenced Cyber Security	Partial evidence	Eindhoven, NetherlandsHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “Defenced is the IT security knowledge partner for large and medium-sized organizations.” Source: RevenueBase Database · checked Sep 28, 2026
6	Securesult	Indirect evidence	The Hague, NetherlandsHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “Bij Securesult richten we ons op het bieden van hoogwaardige informatiebeveiligingsoplossingen voor organisaties van elke omvang.” Source: RevenueBase Database · checked Sep 28, 2026
7	Dongit	Partial evidence	Leiden, NetherlandsHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “DongIT is an independent web security and web development company specializing in penetration testing, secure software development, and custom-built web applications.” Source: RevenueBase Database · checked Sep 28, 2026
8	2-Control	Indirect evidence	Breda, NetherlandsHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “2-Control is an IT audit organization and offers support in providing insight into and improving the reliability of automated information.” Source: RevenueBase Database · checked Sep 28, 2026
9	Reqon B.V	Indirect evidence	Leiderdorp, NetherlandsHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “REQON is gespecialiseerd in het uitvoeren van technische beveiligingsonderzoeken in de vorm van (maatwerk) penetratietesten en exposure onderzoeken.” Source: RevenueBase Database · checked Sep 28, 2026
10	Onyx Cybersecurity	Partial evidence	Amersfoort, NetherlandsHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “Onyx Cyber Security provides a number of services related to the field of IT security.” Source: RevenueBase Database · checked Sep 28, 2026
11	Cyber Seals	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “At Cyber Seals, we believe in a digital world where you can work, innovate, and grow securely.” Source: RevenueBase Database · checked Sep 28, 2026
12	Argis IT Consultants	Indirect evidence	Zwolle, NetherlandsHQ checked Sep 28, 2026	1-10	15 contacts →
	Indirect evidence “Argis IT Consultants is your partner in IT Control.” Source: RevenueBase Database · checked Sep 28, 2026
13	Base Cyber Security	Partial evidence	Rotterdam, NetherlandsHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “Base is a niche consultancy & managed security solutions provider, offering services enabling organizations, and professionals, to build knowledge & capabilities in information…” Source: RevenueBase Database · checked Sep 28, 2026
14	Sirius Security	Strong evidence	Alkmaar, NetherlandsHQ checked Sep 28, 2026	1-10	12 contacts →
	Strong evidence “Specialists from Sirius Security have all the skills to help enterprise organisations to secure their IT environment.” Source: RevenueBase Database · checked Sep 28, 2026
15	Secwatch B.V	Partial evidence	Almere, NetherlandsHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “Even when your security is well underpinned, it remains important to remain alert to possible vulnerabilities, to the system's alerting and response capabilities and to the…” Source: RevenueBase Database · checked Sep 28, 2026
16	Risguard	Indirect evidence	Rotterdam, NetherlandsHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “Risguard was founded by Thom, Wolbert and Jurgen, three experienced IT-audit professionals with over 25 years of combined experience in IT audit, IT risk management & IT…” Source: RevenueBase Database · checked Sep 28, 2026
17	Whitehats B.V	Indirect evidence	Eindhoven, NetherlandsHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “We are eager to use our expertise to create a digital world where information is secure and websites are reliable.” Source: RevenueBase Database · checked Sep 28, 2026
18	ANOVE	Partial evidence	The Hague, NetherlandsHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “Anove stands at the forefront of digital security, boasting a rich legacy dating back to 1996.” Source: RevenueBase Database · checked Sep 28, 2026
19	Sekurno Cybersecurity	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 28, 2026	1-10	11 contacts →
	Partial evidence “Sekurno is a cybersecurity company that provides security services beyond mere compliance.” Source: RevenueBase Database · checked Sep 28, 2026
20	Cyber7	Partial evidence	Capelle Aan Den Ijssel, NetherlandsHQ checked Sep 28, 2026	1-10	11 contacts →
	Partial evidence “Cyber7 Cyber Security Consultancy” Source: RevenueBase Database · checked Sep 28, 2026
21	Cyber Security Challengers	Partial evidence	Abcoude, NetherlandsHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “Cyber Security Challengers (CSC) is uw onafhankelijke cybersecurity expert en dienstverlener.” Source: RevenueBase Database · checked Sep 28, 2026
22	Cyber Cloud	Indirect evidence	Bleskensgraaf, NetherlandsHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “Cyber Cloud is een jong, ambitieus en innovatief bedrijf, gespecialiseerd in het uitvoeren van technische testen met als doel kwetsbaarheden in uw (web/mobiele)applicaties…” Source: RevenueBase Database · checked Sep 28, 2026
23	Linksecure	Indirect evidence	Roelofarendsveen, NetherlandsHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “Hoe vatbaar is jouw organisatie voor hacks?” Source: RevenueBase Database · checked Sep 28, 2026
24	Itseqr	Partial evidence	Moordrecht, NetherlandsHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Altijd inzage in uw IT security door onze SEQR Horizon, een uniek innovatief concept wat u ervan verzekerd dat de inrichting van componenten binnen uw IT omgeving voldoet aan de…” Source: RevenueBase Database · checked Sep 28, 2026
25	ONVIO	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “Onvio is dé specialist in het uitvoeren van Pentesten.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: enterprise security assessment services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names enterprise security assessment services.
Partial evidence: Its own public description names part of enterprise security assessment services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise security assessment services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 212 enterprise security assessment services based in the Netherlands

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Enterprise security assessment services based in the Netherlands at a glance

As of Sep 28, 2026

26.1%Verified-email coverage

6.3Average contacts per company

1-10Median size (employees)

11.3%Largest-city concentration · Amsterdam

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

165

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Netherlands, so it is reported there. Company counts and contact totals on this page are exact for Netherlands, over 212 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among enterprise security assessment services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the Netherlands whose own description of what they do matches “enterprise security assessment services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names enterprise security assessment services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among enterprise security assessment services, and records with no verified work email. Companies headquartered outside Netherlands are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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: Every listed company carries at least one verified work email, 350 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names enterprise security assessment services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many enterprise security assessment services are there based in the Netherlands?

RevenueBase identified 212 enterprise security assessment services headquartered in the Netherlands as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Databalance, headquartered in Re, tops this list with the largest team on record.

Which city has the most enterprise security assessment services?

Amsterdam leads with 24 headquartered companies, followed by Rotterdam (8) and Eindhoven (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 350 verified decision-maker contacts tracked across these 212 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.