Company lists · Data refreshed November 2026

Top 19 IT security consultancies based in the Netherlands

RevenueBase identified 689 company matches for IT security consultancies associated with the Netherlands as of November 2026 and tracks 6,212 professional contacts across them, including 2,231 with verified work emails. Amsterdam is the largest hub.

This list covers company matches for IT security consultancies 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 November 5, 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 Nov 5, 2026 How this list was built
689Companies
6,212Contacts tracked
2,231Verified emails
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The 19 largest IT security consultancies based in the Netherlands

Ranked by team size
Top 19 of 689 company matches for IT security consultancies based in the Netherlands, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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 matchRijswijk, NetherlandsHQ recorded Nov 5, 2026201-500232 contacts →

Exact match

“Fox-IT prevents, solves and mitigates the most serious cyber threats with innovative solutions for government, defense, law enforcement, critical infrastructure, banking, and…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchCapelle Aan Den Ijssel, NetherlandsHQ recorded Nov 5, 2026n/a192 contacts →

Exact match

“We help organizations gain control over their digital foundation.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchBarendrecht, NetherlandsHQ recorded Nov 5, 202651-200173 contacts →

Exact match

“Introducing Nsecure Nsecure supports organisations in their operational processes by providing innovative combinations of technology, ICT and human oversight.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchLeiden, NetherlandsHQ recorded Nov 5, 202651-200125 contacts →

Exact match

“FreshMinds is an IT Consultancy company with focus on Software, Data, Cloud- & Cyber Security Engineering.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchDelft, NetherlandsHQ recorded Nov 5, 202651-200104 contacts →

Exact match

“Pinewood te Delft is al 28 jaar de specialist in cybersecurity en voor veel bedrijven en organisaties de one-stop security partner.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchNieuwkuijk, NetherlandsHQ recorded Nov 5, 202651-20075 contacts →

Exact match

“U moet kunnen vertrouwen op de beschikbaarheid en veiligheid van uw bedrijfskritische systemen.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchEindhoven, NetherlandsHQ recorded Nov 5, 202651-20068 contacts →

Exact match

“In een wereld vol risico’s en verplichtingen is het een uitdaging om in control te zijn én je prioriteiten scherp te houden.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8Exact matchAmsterdam, NetherlandsHQ recorded Nov 5, 202651-20061 contacts →

Exact match

“At Wrangu we understand the challenges our clients face around data privacy management, security, governance, risk and compliance.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchDriebergen-rijsenburg, NetherlandsHQ recorded Nov 5, 202651-20052 contacts →

Exact match

“DiVetro is een onafhankelijk adviesbureau dat gespecialiseerd is in het beantwoorden en implementeren van IT-gerelateerde strategische vraagstukken.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchLopik, NetherlandsHQ recorded Nov 5, 2026n/a51 contacts →

Exact match

“Goed advies levert geld op.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchRosmalen, NetherlandsHQ recorded Nov 5, 202651-20046 contacts →

Exact match

“Ready to turn your organization into a frontrunner?”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchBunnik, NetherlandsHQ recorded Nov 5, 202651-20040 contacts →

Exact match

“I-share is de specialist in Cloud Native Platform Engineering.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchLj, NetherlandsHQ recorded Nov 5, 202651-20040 contacts →

Exact match

“ON2IT is a global pure-play cybersecurity service provider.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact match3447gg, NetherlandsHQ recorded Nov 5, 202611-5034 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 · Nov 5, 2026 · View company records in RevenueBase
15Exact matchDiemen, NetherlandsHQ recorded Nov 5, 2026201-50034 contacts →

Exact match

“Adviseren en implementeren zijn binnen Cybersecurity vaak totaal verschillende werelden.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchHaaksbergen, NetherlandsHQ recorded Nov 5, 202611-5031 contacts →

Exact match

“At Nubix, we stand for innovation and top quality in IT solutions.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17Exact matchAlmere, NetherlandsHQ recorded Nov 5, 202651-20031 contacts →

Exact match

“Ultimum has been the IT partner of choice since 1997, when it comes to designing, realizing and managing a secure and future-proof digital infrastructure.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchDelft, NetherlandsHQ recorded Nov 5, 202611-5030 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 · Nov 5, 2026 · View company records in RevenueBase
19Exact matchHaarlem, NetherlandsHQ recorded Nov 5, 202611-5028 contacts →

Exact match

“Navaio IT Security helpt bedrijfsgeheimen en gevoelige data te beveiligen en ondersteunt bij het realiseren van compliance (AVG, ISO, NEN, NIST, BIO).”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 19 of 689 IT security consultancies based in the Netherlands

See the full list, filter by size, metro and specialty, and access 2,231 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT security consultancies based in the Netherlands at a glance

As of Nov 5, 2026
35.9%Verified-email coverage
9.0Average contacts per company
1-10Median size (employees)
8.1%Largest-city concentration · Amsterdam
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
492
11-50
148
51-200
32
201-500
13
501-1,000
1
1,001-5,000
2

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 689 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 “IT security consultancies” 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 2,231 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 November 5, 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 “IT security consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT security consultancies are there based in the Netherlands?

RevenueBase identified 689 company matches for IT security consultancies associated with the Netherlands as of November 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?

Fox-It tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most IT security consultancies?

Amsterdam leads with 56 company records, followed by The Hague (30) and Rotterdam (25).

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 2,231 professional contacts with verified work emails tracked across these 689 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 November 5, 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.