Company lists · Data refreshed September 2026

Top 25 IT and cybersecurity audit services based in the Netherlands

RevenueBase identified 260 company matches for IT and cybersecurity audit services associated with the Netherlands as of September 2026 and tracks 1,824 professional contacts across them, including 648 with verified work emails. Amsterdam is the largest hub.

This list covers company matches for IT and cybersecurity audit services 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 21, 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 21, 2026 How this list was built
260Companies
1,824Contacts tracked
648Verified emails
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The 25 largest IT and cybersecurity audit services based in the Netherlands

Ranked by team size
Top 25 of 260 company matches for IT and cybersecurity audit services based in the Netherlands, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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 matchUtrecht, NetherlandsHQ recorded Sep 21, 2026201-500213 contacts →

Exact match

“Northwave Northwave offers an Intelligent combination of cyber security services to protect your information.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchThe Hague, NetherlandsHQ recorded Sep 21, 2026201-50072 contacts →

Exact match

“Xalient ondersteunt toonaangevende organisaties bij het beschermen van hun meest waardevolle middelen: hun medewerkers, applicaties en data.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchNieuwkuijk, NetherlandsHQ recorded Sep 21, 202651-20060 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact match3447gg, NetherlandsHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
5Exact matchHaarlem, NetherlandsHQ recorded Sep 21, 202611-5030 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 · Sep 21, 2026 · View company records in RevenueBase
6Exact matchLeiderdorp, NetherlandsHQ recorded Sep 21, 202611-5027 contacts →

Exact match

“Audittrail verzorgt audits voor en adviseert over de vakgebieden informatiebeveiliging, privacy, governance, risk & compliance en kwaliteit.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchDelft, NetherlandsHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
8Exact matchLeuvenheim, NetherlandsHQ recorded Sep 21, 202611-5024 contacts →

Exact match

“In the 13 years that InAudit has been in existence, we have grown from a provider of internal audit services into a group that does much more than that.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchLichtenvoorde, NetherlandsHQ recorded Sep 21, 202611-5023 contacts →

Exact match

“Over Harbers Group Harbers Group helpt organisaties vooruit met slimme ICT-oplossingen, innovatieve software en sterke cybersecurity.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchRotterdam, NetherlandsHQ recorded Sep 21, 202611-5023 contacts →

Exact match

“ThreadStone is uw toonaangevende specialist op het gebied van cybersecurity.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchThe Hague, NetherlandsHQ recorded Sep 21, 202611-5021 contacts →

Exact match

“PuraSec levert expertise op het gebied van cybersecurity binnen de deelgebieden; mens, beleid en techniek.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchThe Hague, NetherlandsHQ recorded Sep 21, 202611-5019 contacts →

Exact match

“Bij Securesult richten we ons op het bieden van hoogwaardige informatiebeveiligingsoplossingen voor organisaties van elke omvang.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchRijswijk, NetherlandsHQ recorded Sep 21, 202611-5019 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchLeiden, NetherlandsHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
15Exact matchBreda, NetherlandsHQ recorded Sep 21, 202611-5018 contacts →

Exact match

“2-Control is an IT audit organization and offers support in providing insight into and improving the reliability of automated information.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchHaarlem, NetherlandsHQ recorded Sep 21, 202611-5018 contacts →

Exact match

“By predefined steps of analysis, we deliver insights in the level of IT-control and risk, implement consolidated and transparent solutions based on best practices and assist in…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchApeldoorn, NetherlandsHQ recorded Sep 21, 202611-5016 contacts →

Exact match

“SoliTrust is specialist op gebied van IT-auditing en data-analyse vanuit een focus op financiële data.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchLeiderdorp, NetherlandsHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
19Exact matchAmersfoort, NetherlandsHQ recorded Sep 21, 202611-5016 contacts →

Exact match

“Onyx Cyber Security provides a number of services related to the field of IT security.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchUtrecht, NetherlandsHQ recorded Sep 21, 202611-5015 contacts →

Exact match

“At Cyber Seals, we believe in a digital world where you can work, innovate, and grow securely.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchZwolle, NetherlandsHQ recorded Sep 21, 20261-1015 contacts →

Exact match

“Argis IT Consultants is your partner in IT Control.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchSittard, NetherlandsHQ recorded Sep 21, 202611-5013 contacts →

Exact match

“Complete data protection & cybersecurity.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchAlkmaar, NetherlandsHQ recorded Sep 21, 20261-1012 contacts →

Exact match

“Specialists from Sirius Security have all the skills to help enterprise organisations to secure their IT environment.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchVlijmen, NetherlandsHQ recorded Sep 21, 202611-5011 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchAlmere, NetherlandsHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase

Showing 25 of 260 IT and cybersecurity audit services based in the Netherlands

See the full list, filter by size, metro and specialty, and access 648 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT and cybersecurity audit services based in the Netherlands at a glance

As of Sep 21, 2026
35.5%Verified-email coverage
7.0Average contacts per company
1-10Median size (employees)
8.8%Largest-city concentration · Amsterdam
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
191
11-50
53
51-200
8
201-500
7
501-1,000
1

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 260 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 and cybersecurity audit services” 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 648 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 21, 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 and cybersecurity audit services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT and cybersecurity audit services are there based in the Netherlands?

RevenueBase identified 260 company matches for IT and cybersecurity audit services 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?

Northwave Cyber Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most IT and cybersecurity audit services?

Amsterdam leads with 23 company records, followed by The Hague (14) and Eindhoven (8).

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 648 professional contacts with verified work emails tracked across these 260 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 21, 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.