Company lists · Data refreshed September 2026

Top 15 Internal audit outsourcing firms based in the Netherlands

RevenueBase identified 29 company matches for internal audit outsourcing firms associated with the Netherlands as of September 2026 and tracks 195 professional contacts across them, including 76 with verified work emails. Amsterdam is the largest hub.

This list covers company matches for internal audit outsourcing 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 28, 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 28, 2026 How this list was built
29Companies
195Contacts tracked
76Verified emails
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The 15 largest internal audit outsourcing firms based in the Netherlands

Ranked by team size
Top 15 of 29 company matches for internal audit outsourcing firms based in the Netherlands, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 matchAmsterdam, NetherlandsHQ recorded Sep 28, 202651-20054 contacts →

Exact match

“Past de beheersstructuur nog bij mijn organisatie?”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchLeuvenheim, NetherlandsHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
3Exact matchHoofddorp, NetherlandsHQ recorded Sep 28, 202611-5017 contacts →

Exact match

“Welkom bij Just Audit!”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchUtrecht, NetherlandsHQ recorded Sep 28, 202651-20016 contacts →

Exact match

“Ferocia helpt organisaties met het optimaliseren van hun sturing en beheersing.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchHilversum, NetherlandsHQ recorded Sep 28, 202651-20013 contacts →

Exact match

“Door de alsmaar veranderende, complexere wereld en steeds nieuwe wet- en regelgeving ontstaan er nieuwe risico’s en kansen.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchBreda, NetherlandsHQ recorded Sep 28, 202611-5012 contacts →

Exact match

“ESJ Audit verzorgt wettelijke controleopdrachten voor middelgrote ondernemingen, zowel nationaal als internationaal.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchUtrecht, NetherlandsHQ recorded Sep 28, 202651-20010 contacts →

Exact match

“Into Control is gespecialiseerd in het adviseren en ondersteunen van uw organisatie bij de implementatie van interne beheersing.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchUtrecht, NetherlandsHQ recorded Sep 28, 20261-108 contacts →

Exact match

“Duijnborgh Audit is een onafhankelijke audit- en adviesorganisatie en biedt pragmatische en sterk oplossingsgerichte ondersteuning aan grote en middelgrote ondernemingen.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchAmsterdam, NetherlandsHQ recorded Sep 28, 20261-106 contacts →

Exact match

“ONE Risk Advisory ‘The Advantage of Risk' ONE Risk Advisory delivers specialized services in the following areas- Risk Management - Internal Audit Risk Management solutions…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchRotterdam, NetherlandsHQ recorded Sep 28, 20261-106 contacts →

Exact match

“weACT: Drie pijlers, één missie.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchMaurik, NetherlandsHQ recorded Sep 28, 20261-102 contacts →

Exact match

“4PP Audit - Internal Audit as a Service - Consultancy en Trainingen 4PP Audit is een jong en dynamisch bedrijf.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchHengelo, NetherlandsHQ recorded Sep 28, 20261-102 contacts →

Exact match

“IT Risk Control is een onafhankelijke en professionele dienstverlener van IT-auditdiensten en IT-adviesdiensten met ervaren en gecertificeerd medewerkers op het gebied van…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchEindhoven, NetherlandsHQ recorded Sep 28, 20261-101 contacts →

Exact match

“Quintesense provides (internal) auditing capacity, consultancy services in the area of internal control and compliance.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchAmersfoort, NetherlandsHQ recorded Sep 28, 20261-101 contacts →

Exact match

“Impossible is not an option; I find solutions.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchMontfoort, NetherlandsHQ recorded Sep 28, 20261-101 contacts →

Exact match

“Bij Administratiekantoor Kelder & Duijnmaijer kun je terecht voor het inrichten en controleren van de administratie en boekhouding.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 15 of 29 internal audit outsourcing firms based in the Netherlands

See the full list, filter by size, metro and specialty, and access 76 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Internal audit outsourcing firms based in the Netherlands at a glance

As of Sep 28, 2026
39.0%Verified-email coverage
6.7Average contacts per company
1-10Median size (employees)
17.2%Largest-city concentration · Amsterdam
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
21
11-50
4
51-200
4

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 29 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 “internal audit outsourcing 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 76 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 28, 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 “internal audit outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many internal audit outsourcing firms are there based in the Netherlands?

RevenueBase identified 29 company matches for internal audit outsourcing 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?

Auditdienst Acam tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most internal audit outsourcing firms?

Amsterdam leads with 5 company records, followed by Nd (2) and Rotterdam (2).

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 76 professional contacts with verified work emails tracked across these 29 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 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 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.