Company lists · Data refreshed September 2026

Top 25 Iso 27001 audit services based in the Netherlands

Name: Iso 27001 audit 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 57 companies tracked

RevenueBase identified 57 iso 27001 audit services headquartered in the Netherlands as of September 2026 and tracks 218 professional contacts across them, including 104 with verified work emails. Apeldoorn is the largest hub.

This list covers iso 27001 audit 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

57Companies

218Contacts tracked

104Verified emails

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The 25 largest iso 27001 audit services based in the Netherlands

Ranked by team size

Top 25 of 57 iso 27001 audit 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 iso 27001 audit 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	Digitrust	Indirect evidence	Eindhoven, NetherlandsHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “é.” Source: RevenueBase Database · checked Sep 28, 2026
2	2-Control	Partial evidence	Breda, NetherlandsHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial 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
3	Onyx Cybersecurity	Indirect evidence	Amersfoort, NetherlandsHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “Onyx Cyber Security provides a number of services related to the field of IT security.” Source: RevenueBase Database · checked Sep 28, 2026
4	Kwinzo	Indirect evidence	Bodegraven, NetherlandsHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “Informatiebeveiliging en kwaliteitsborging gecompliceerd?” Source: RevenueBase Database · checked Sep 28, 2026
5	Auditconnect B.V	Strong evidence	Apeldoorn, NetherlandsHQ checked Sep 28, 2026	11-50	12 contacts →
	Strong evidence “AuditConnect helpt organisaties aantoonbaar voldoen aan ISO 27001, NEN7510 en NIS2.” Source: RevenueBase Database · checked Sep 28, 2026
6	Risguard	Partial evidence	Rotterdam, NetherlandsHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial 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
7	Grip IT Consultancy	Indirect evidence	Vlaardingen, NetherlandsHQ checked Sep 28, 2026	1-10	9 contacts →
	Indirect evidence “Grip IT Consultancy is gespecialiseerd in het geven van advies op het gebied van de AVG, IT-beleid, IT-infrastructuur en Security, het uitvoeren van pentesten op klantomgevingen…” Source: RevenueBase Database · checked Sep 28, 2026
8	Ecosystem	Indirect evidence	Rijswijk, NetherlandsHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “ECOSYSTEM Global IT Services B.V.” Source: RevenueBase Database · checked Sep 28, 2026
9	Protify	Indirect evidence	Maarssen, NetherlandsHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “Protify can assist you in a short period of time for certification- ISO27001 Information Security (ISAE, SOC, etc.)- ISO22301 BCM - ISO9001 - NEN7510 - EN50518 (Alarm monitoring &…” Source: RevenueBase Database · checked Sep 28, 2026
10	Omni-U	Indirect evidence	Apeldoorn, NetherlandsHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Your success is based on clear vision, strategies and business processes.” Source: RevenueBase Database · checked Sep 28, 2026
11	Mathison BV	Indirect evidence	Bodegraven, NetherlandsHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Met meer dan 15 jaar ervaring op het gebied van informatiebeveiliging en privacy ondersteunen we organisaties in het grip krijgen op en continu verbeteren van de beveiliging van…” Source: RevenueBase Database · checked Sep 28, 2026
12	Isozeker	Strong evidence	Enschede, NetherlandsHQ checked Sep 28, 2026	1-10	3 contacts →
	Strong evidence “Met een sterke focus op het begeleiden van uw organisatie naar ISO 27001-certificering, staat ISOZEKER klaar om uw betrouwbare partner te zijn voor informatiebeveiliging.” Source: RevenueBase Database · checked Sep 28, 2026
13	Thinking Security Works	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Thinking Security Works helps organizations think more clearly about security.” Source: RevenueBase Database · checked Sep 28, 2026
14	Newmorn'	Indirect evidence	Arnhem, NetherlandsHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Newmorn' stelt alles in het werk om te zorgen dat onze opdrachtgevers zich ongestoord kunnen focussen op groei en verbetering.” Source: RevenueBase Database · checked Sep 28, 2026
15	Hofberger B.V	Indirect evidence	Baarn, NetherlandsHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Bij Hofberger kunt u terecht voor advies, implementatie en ondersteuning op het gebied van cybersecurity en compliance.” Source: RevenueBase Database · checked Sep 28, 2026
16	Duijnborgh Certification B.V	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Duijnborgh Certification is een onafhankelijke certificeringsinstelling.” Source: RevenueBase Database · checked Sep 28, 2026
17	Instant 27001	Strong evidence	Rotterdam, NetherlandsHQ checked Sep 28, 2026	1-10	2 contacts →
	Strong evidence “Instant 27001 is a lean, practice-based system with clear guidance and realistic examples, built to help teams implement and maintain ISO 27001 in practice, without security…” Source: RevenueBase Database · checked Sep 28, 2026
18	IT Risk Control	Indirect evidence	Hengelo, NetherlandsHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “IT Risk Control is een onafhankelijke en professionele dienstverlener van IT-auditdiensten en IT-adviesdiensten met ervaren en gecertificeerd medewerkers op het gebied van…” Source: RevenueBase Database · checked Sep 28, 2026
19	compleye.io	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Security and Privacy Compliance.” Source: RevenueBase Database · checked Sep 28, 2026
20	Cispro	Indirect evidence	Heerhugowaard, NetherlandsHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Security Officer (extern): Voor veel ondernemingen is het in dienst hebben van een Security Officer niet rendabel vanwege de omvang van de onderneming en de bijkomende kosten voor…” Source: RevenueBase Database · checked Sep 28, 2026
21	Vidar Security	Partial evidence	Amersfoort, NetherlandsHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Vidar security is een audit- en advieskantoor dat op betrouwbare, praktische en doeltreffende wijze, hoogwaardige diensten levert aan haar opdrachtgevers.” Source: RevenueBase Database · checked Sep 28, 2026
22	Digisecur BV	Indirect evidence	Zoetermeer, NetherlandsHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “DigiSecur BV is organisatieadviesbureau die bestaat uit een mix van ervaren security professionals die energie krijgen van het ondersteunen van organisaties om haar…” Source: RevenueBase Database · checked Sep 28, 2026
23	Praktijk Marinka Versteeg	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
24	Onetribe	Partial evidence	Rotterdam, NetherlandsHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “I'm an experienced consultant in the field of ISO compliance and data protection providing guidance on how to implement the international standards for quality (9001) and…” Source: RevenueBase Database · checked Sep 28, 2026
25	PTA Security	Indirect evidence	Groningen, NetherlandsHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “PTA security bestaat sinds 2013 en wordt gerund door Peter Tak De aangeboden diensten bestaan o.a.” 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: iso 27001 audit 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 iso 27001 audit services.
Partial evidence: Its own public description names part of iso 27001 audit services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name iso 27001 audit 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 57 iso 27001 audit services based in the Netherlands

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Iso 27001 audit services based in the Netherlands at a glance

As of Sep 28, 2026

47.7%Verified-email coverage

3.8Average contacts per company

1-10Median size (employees)

7.0%Largest-city concentration · Apeldoorn

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 57 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 iso 27001 audit 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 “iso 27001 audit 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 iso 27001 audit 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 iso 27001 audit 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, 104 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 iso 27001 audit 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 iso 27001 audit services are there based in the Netherlands?

RevenueBase identified 57 iso 27001 audit 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?

Digitrust, headquartered in Gw, tops this list with the largest team on record.

Which city has the most iso 27001 audit services?

Apeldoorn leads with 4 headquartered companies, followed by Rotterdam (4) and Utrecht (3).

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 104 verified decision-maker contacts tracked across these 57 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.