Company lists · Data refreshed September 2026

Top 25 Vulnerability assessment firms based in the Netherlands

RevenueBase identified 83 company matches for vulnerability assessment firms associated with the Netherlands as of September 2026 and tracks 377 professional contacts across them, including 159 with verified work emails. Amsterdam is the largest hub.

This list covers company matches for vulnerability assessment firms associated with the Netherlands, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 22, 2026 How this list was built
83Companies
377Contacts tracked
159Verified emails
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The 25 largest vulnerability assessment firms based in the Netherlands

Ranked by team size
Top 25 of 83 company matches for vulnerability assessment firms based in the Netherlands, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact match3447gg, NetherlandsHQ recorded Sep 22, 202611-5037 contacts →

Exact match

“Surelock IT Security Services helpt organisatie inzicht te krijgen in de IT-kwetsbaarheden van hun organisatie.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchAmsterdam, NetherlandsHQ recorded Sep 22, 202611-5034 contacts →

Exact match

“Penetration Testing | Agile Security Testing | Red Teaming Securify is a cybersecurity company with a team of professional and passionate ethical hackers, secure coding experts…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchDelft, NetherlandsHQ recorded Sep 22, 202611-5025 contacts →

Exact match

“LBVD is een Delfts onderzoeks- en adviesbureau gespecialiseerd in digitale veiligheid, cybersecurity (ICT-security) en informatiebeveiliging, met 20+ jaar ervaring.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchLeiden, NetherlandsHQ recorded Sep 22, 202611-5018 contacts →

Exact match

“DongIT is an independent web security and web development company specializing in penetration testing, secure software development, and custom-built web applications.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchLeiderdorp, NetherlandsHQ recorded Sep 22, 202611-5016 contacts →

Exact match

“REQON is gespecialiseerd in het uitvoeren van technische beveiligingsonderzoeken in de vorm van (maatwerk) penetratietesten en exposure onderzoeken.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchWaddinxveen, NetherlandsHQ recorded Sep 22, 202611-5013 contacts →

Exact match

“Safetech is een adviserend ingenieursbureau gespecialiseerd in beveiligingsadviezen.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchAlmere, NetherlandsHQ recorded Sep 22, 202611-5011 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchAmsterdam, NetherlandsHQ recorded Sep 22, 20261-1011 contacts →

Exact match

“Sekurno is a cybersecurity company that provides security services beyond mere compliance.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchCapelle Aan Den Ijssel, NetherlandsHQ recorded Sep 22, 20261-1011 contacts →

Exact match

“Cyber7 Cyber Security Consultancy”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchBleskensgraaf, NetherlandsHQ recorded Sep 22, 20261-1010 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchRoelofarendsveen, NetherlandsHQ recorded Sep 22, 20261-1010 contacts →

Exact match

“Hoe vatbaar is jouw organisatie voor hacks?”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchUtrecht, NetherlandsHQ recorded Sep 22, 202611-509 contacts →

Exact match

“Onvio is dé specialist in het uitvoeren van Pentesten.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchAlmere, NetherlandsHQ recorded Sep 22, 202611-506 contacts →

Exact match

“Rootsec brengt aan de hand van Penetratietesten de risico’s en kwetsbaarheden binnen uw IT-omgeving in kaart.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchAmsterdam, NetherlandsHQ recorded Sep 22, 20261-105 contacts →

Exact match

“The Catcher24 Scanner identifies vulnerabilities so you will quickly know when you are at risk.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15Exact matchWeert, NetherlandsHQ recorded Sep 22, 20261-105 contacts →

Exact match

“Shellback is an enthusiastic and dedicated team of security specialists based in Weert.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchVeghel, NetherlandsHQ recorded Sep 22, 20261-104 contacts →

Exact match

“Calvo Advies is gespecialiseerd in bedrijfszekerheid.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchUtrecht, NetherlandsHQ recorded Sep 22, 20261-104 contacts →

Exact match

“ThreatLabs specializes in security assessments providing valuable insights in vulnerabilities and weaknesses as well as actionable advise to increase the security posture of IT…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchZeewolde, NetherlandsHQ recorded Sep 22, 20261-104 contacts →

Exact match

“Stel je voor, ergens in het digitale universum waarin we leven, zijn er sluwe hackers die de boel willen verstoren.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchVleuten, NetherlandsHQ recorded Sep 22, 20261-104 contacts →

Exact match

“At Secuza, we enable our customers in improving their business operations by leveraging our industry-wide experience, expertise in cutting-edge technology and an extensive…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20Exact matchArnhem, NetherlandsHQ recorded Sep 22, 202611-503 contacts →

Exact match

“Het is voor onze economie en samenleving essenstiel dat digitale infrastructuren betrouwbaar en beschikbaar zijn.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21Exact matchUtrecht, NetherlandsHQ recorded Sep 22, 20261-103 contacts →

Exact match

“Welkom op ons Tozetta bedrijfsprofiel.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchAmsterdam, NetherlandsHQ recorded Sep 22, 20261-103 contacts →

Exact match

“Bij Socured geloven we niet in vendor-gedreven advies of losse oplossingen.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchUtrecht, NetherlandsHQ recorded Sep 22, 20261-103 contacts →

Exact match

“Codean Labs ethical hackers evaluate the security of your solution and guide you towards vulnerability remediation, from design to production and beyond.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24Exact matchDe Falom, NetherlandsHQ recorded Sep 22, 20261-102 contacts →

Exact match

“We help SME entrepreneurs improve their resilience against cybercriminals and hackers.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25Exact matchAmsterdam, NetherlandsHQ recorded Sep 22, 20261-102 contacts →

Exact match

“Our area of focus is evaluating cyber risk, ensuring compliance and evaluating your security with your third party partners.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 25 of 83 vulnerability assessment firms based in the Netherlands

See the full list, filter by size, metro and specialty, and access 159 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Vulnerability assessment firms based in the Netherlands at a glance

As of Sep 22, 2026
42.2%Verified-email coverage
4.5Average contacts per company
1-10Median size (employees)
14.5%Largest-city concentration · Amsterdam
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
65
11-50
18

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 83 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the Netherlands whose business descriptions match “vulnerability assessment firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 159 professional contacts with verified work emails across the full matched dataset. 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 22, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “vulnerability assessment firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many vulnerability assessment firms are there based in the Netherlands?

RevenueBase identified 83 company matches for vulnerability assessment firms associated with the Netherlands as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Surelock IT Security Services tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most vulnerability assessment firms?

Amsterdam leads with 12 company records, followed by Rotterdam (4) and Groningen (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 159 professional contacts with verified work emails tracked across these 83 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 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 SmartSearch, 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.