Company lists · Data refreshed September 2026

Top 17 Insider threat investigation companies based in the Netherlands

RevenueBase identified 33 insider threat investigation companies headquartered in the Netherlands as of September 2026 and tracks 430 professional contacts across them, including 165 with verified work emails. Apeldoorn is the largest hub.

This list covers insider threat investigation companies 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 20, 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 20, 2026 86% judged on-target in blind review
33Companies
430Contacts tracked
165Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 17 largest insider threat investigation companies based in the Netherlands

Ranked by team size
Top 17 of 33 insider threat investigation companies based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to insider threat investigation companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceRijswijk, NetherlandsHQ checked Sep 20, 2026201-500233 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 20, 2026
2Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 20, 202611-5035 contacts →

Indirect evidence

“Working as ethical hackers and security researchers over the past decade we learned that online security became a Wild West for companies.”

Source: RevenueBase Database · checked Sep 20, 2026
3Partial evidenceThe Hague, NetherlandsHQ checked Sep 20, 202611-5016 contacts →

Partial evidence

“At Signpost Six, we empower organisations to proactively manage insider risk and build resilient security cultures where people and business can thrive.”

Source: RevenueBase Database · checked Sep 20, 2026
4Indirect evidenceAlkmaar, NetherlandsHQ checked Sep 20, 20261-1012 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 20, 2026
5Indirect evidenceOosterbeek, NetherlandsHQ checked Sep 20, 20261-107 contacts →

Indirect evidence

“Wie wij zijn: Signum Interfocus is opgericht in 2004 en is uitgegroeid tot één van de grootste particuliere recherche- en adviesorganisatie van Nederland.”

Source: RevenueBase Database · checked Sep 20, 2026
6Indirect evidenceGouda, NetherlandsHQ checked Sep 20, 20261-105 contacts →

Indirect evidence

“Ons Recherchebureau doet onderzoeken voor bedrijven naar misstanden binnen de organisatie.”

Source: RevenueBase Database · checked Sep 20, 2026
7Partial evidenceEindhoven, NetherlandsHQ checked Sep 20, 20261-104 contacts →

Partial evidence

Investigations Services.”

Source: RevenueBase Database · checked Sep 20, 2026
8Partial evidenceZaandijk, NetherlandsHQ checked Sep 20, 202611-503 contacts →

Partial evidence

“PSG Recherche is a company that delivers high-quality investigation and consulting services.”

Source: RevenueBase Database · checked Sep 20, 2026
9Indirect evidenceNieuwegein, NetherlandsHQ checked Sep 20, 202611-503 contacts →

Indirect evidence

“Private detective and security agency QUSO BV is located in Europe, having an office in the centre of the Netherlands.”

Source: RevenueBase Database · checked Sep 20, 2026
10Indirect evidenceAlmelo, NetherlandsHQ checked Sep 20, 20261-103 contacts →

Indirect evidence

“Diefstal, fraude, oplichting, bedrijfsspionage; om zomaar even iets op te noemen.”

Source: RevenueBase Database · checked Sep 20, 2026
11Indirect evidenceHeerenveen, NetherlandsHQ checked Sep 20, 20261-102 contacts →

Indirect evidence

“E11EVEN is founded by Theunis Kloosterman and Dirk de Hen in 2011.”

Source: RevenueBase Database · checked Sep 20, 2026
12Partial evidenceApeldoorn, NetherlandsHQ checked Sep 20, 202651-2002 contacts →

Partial evidence

“The DIGITPOL Stolen Vehicle Recovery Unit is an international vehicle investigation, recovery, and repatriation agency specialising in the tracing, location, seizure, recovery…”

Source: RevenueBase Database · checked Sep 20, 2026
13Partial evidenceHoofddorp, NetherlandsHQ checked Sep 20, 202611-501 contacts →

Partial evidence

“Security & Investigation Group BV is gespecialiseerd in: • Het uitvoeren van persoonsbeveiligingsopdrachten.”

Source: RevenueBase Database · checked Sep 20, 2026
14Indirect evidenceBreda, NetherlandsHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 20, 2026
15Indirect evidenceOverschild, NetherlandsHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

“Ricochet Dynamics’s mission is to address the ubiquitous fraud issue experienced by individuals; many of whom may not even be aware that their credentials have been compromised.”

Source: RevenueBase Database · checked Sep 20, 2026
16Indirect evidenceRoermond, NetherlandsHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

“Nederlands Cyber Recherchebureau of NCRB is een landelijk opererend recherchebureau dat is gevestigd in Roermond.”

Source: RevenueBase Database · checked Sep 20, 2026
17Indirect evidenceHaarlemmermeer, NetherlandsHQ checked Sep 20, 20261-101 contacts →

Indirect evidence

“Inquirendum is een recherche- en digitaal onderzoeksbureau.”

Source: RevenueBase Database · checked Sep 20, 2026

Showing 17 of 33 insider threat investigation companies based in the Netherlands

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 165 reachable decision-makers.

Free signup · no credit card

View the full list →

Insider threat investigation companies based in the Netherlands at a glance

As of Sep 20, 2026
38.4%Verified-email coverage
13.0Average contacts per company
1-10Median size (employees)
9.1%Largest-city concentration · Apeldoorn
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
22
11-50
8
51-200
2
201-500
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 33 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 insider threat investigation companies, 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 “insider threat investigation companies”. 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 insider threat investigation companies), 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 insider threat investigation companies, 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, 165 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 20, 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 insider threat investigation companies, 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 insider threat investigation companies are there based in the Netherlands?

RevenueBase identified 33 insider threat investigation companies 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?

Fox-It, headquartered in Gk, tops this list with the largest team on record.

Which city has the most insider threat investigation companies?

Apeldoorn leads with 3 headquartered companies, followed by Bj (2) and Breda (2).

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 165 verified decision-maker contacts tracked across these 33 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 33 insider threat investigation companies based in the Netherlands. Start with a free account, no credit card.

Download this list →

Related lists

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.