Company lists · Data refreshed September 2026

Top 25 Cms security consulting companies based in the Netherlands

RevenueBase identified 147 cms security consulting companies headquartered in the Netherlands as of September 2026 and tracks 1,077 professional contacts across them, including 278 with verified work emails. Amsterdam is the largest hub.

This list covers cms security consulting 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 27, 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 27, 2026 86% judged on-target in blind review
147Companies
1,077Contacts tracked
278Verified emails
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The 25 largest cms security consulting companies based in the Netherlands

Ranked by team size
Top 25 of 147 cms security consulting companies based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to cms security consulting 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 evidenceNieuwegein, NetherlandsHQ checked Sep 27, 202651-20091 contacts →

Partial evidence

“Tesorion is een Nederlandse, onafhankelijke Managed Security Services Provider (MSSP).”

Source: RevenueBase Database · checked Sep 27, 2026
2Indirect evidenceNieuwkuijk, NetherlandsHQ checked Sep 27, 202651-20060 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
3Indirect evidenceGroningen, NetherlandsHQ checked Sep 27, 202611-5030 contacts →

Indirect evidence

“Ferwerda Beveiliging geeft onafhankelijk advies en bemiddeling op het gebied van veiligheid.”

Source: RevenueBase Database · checked Sep 27, 2026
4Partial evidenceDelft, NetherlandsHQ checked Sep 27, 202611-5025 contacts →

Partial evidence

“LBVD is een Delfts onderzoeks- en adviesbureau gespecialiseerd in digitale veiligheid, cybersecurity (ICT-security) en informatiebeveiliging, met 20+ jaar ervaring.”

Source: RevenueBase Database · checked Sep 27, 2026
5Indirect evidenceRotterdam, NetherlandsHQ checked Sep 27, 202611-5023 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
6Partial evidenceNaarden, NetherlandsHQ checked Sep 27, 202611-5021 contacts →

Partial evidence

“Vest Information Security is an independent, certified consultancy company highly specialized in information security.”

Source: RevenueBase Database · checked Sep 27, 2026
7Indirect evidenceThe Hague, NetherlandsHQ checked Sep 27, 202611-5019 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
8Partial evidenceLeiden, NetherlandsHQ checked Sep 27, 202611-5018 contacts →

Partial evidence

“DongIT is an independent web security and web development company specializing in penetration testing, secure software development, and custom-built web applications.”

Source: RevenueBase Database · checked Sep 27, 2026
9Indirect evidenceUtrecht, NetherlandsHQ checked Sep 27, 202611-5015 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
10Indirect evidenceZwolle, NetherlandsHQ checked Sep 27, 20261-1015 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
11Partial evidenceRotterdam, NetherlandsHQ checked Sep 27, 202611-5014 contacts →

Partial evidence

“Base is a niche consultancy & managed security solutions provider, offering services enabling organizations, and professionals, to build knowledge & capabilities in information…”

Source: RevenueBase Database · checked Sep 27, 2026
12Partial evidenceArnhem, NetherlandsHQ checked Sep 27, 202611-5013 contacts →

Partial evidence

“CyberPeak supports organizations in structurally setting up, securing, and managing their network and cybersecurity environments.”

Source: RevenueBase Database · checked Sep 27, 2026
13Indirect evidenceWaddinxveen, NetherlandsHQ checked Sep 27, 202611-5013 contacts →

Indirect evidence

“Safetech is een adviserend ingenieursbureau gespecialiseerd in beveiligingsadviezen.”

Source: RevenueBase Database · checked Sep 27, 2026
14Partial evidenceAlkmaar, NetherlandsHQ checked Sep 27, 20261-1012 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
15Partial evidenceCapelle Aan Den Ijssel, NetherlandsHQ checked Sep 27, 20261-1011 contacts →

Partial evidence

“Cyber7 Cyber Security Consultancy”

Source: RevenueBase Database · checked Sep 27, 2026
16Indirect evidenceRoelofarendsveen, NetherlandsHQ checked Sep 27, 20261-1010 contacts →

Indirect evidence

“Hoe vatbaar is jouw organisatie voor hacks?”

Source: RevenueBase Database · checked Sep 27, 2026
17Partial evidenceVlaardingen, NetherlandsHQ checked Sep 27, 20261-109 contacts →

Partial 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 27, 2026
18Indirect evidenceDen Helder, NetherlandsHQ checked Sep 27, 202611-508 contacts →

Indirect evidence

“Al meer dan 40 jaar het het adviesbureau voor brandpreventie, inbraakpreventie, veiligheids en veiligheidsopleidingen en het beveiligingsbedrijf voor al uw zaken betreffende alarm…”

Source: RevenueBase Database · checked Sep 27, 2026
19Indirect evidenceEmmen, NetherlandsHQ checked Sep 27, 20261-107 contacts →

Indirect evidence

“Gespecialiseerd in cybersecurity”

Source: RevenueBase Database · checked Sep 27, 2026
20Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 27, 20261-106 contacts →

Indirect evidence

“Welcome to Pro CISO®, a boutique cybersecurity firm certified ISO/IEC 27001 and 9001.”

Source: RevenueBase Database · checked Sep 27, 2026
21Partial evidenceThe Hague, NetherlandsHQ checked Sep 27, 202611-506 contacts →

Partial evidence

“Blueprint Security specialises in manual penetration testing and multiple IT security certification consultancy.”

Source: RevenueBase Database · checked Sep 27, 2026
22Partial evidenceDinteloord, NetherlandsHQ checked Sep 27, 202611-505 contacts →

Partial evidence

“R&T consultancy is an independent consultancy firm specialized in security in the broadest sense of the word.”

Source: RevenueBase Database · checked Sep 27, 2026
23Indirect evidenceHj, NetherlandsHQ checked Sep 27, 202611-505 contacts →

Indirect evidence

“Het internet ontvouwt zich sinds de jaren 90 in razendsnel tempo.”

Source: RevenueBase Database · checked Sep 27, 2026
24Partial evidenceUtrecht, NetherlandsHQ checked Sep 27, 20261-104 contacts →

Partial evidence

“ThreatLabs specializes in security assessments providing valuable insights in vulnerabilities and weaknesses as well as actionable advise to increase the security posture of IT…”

Source: RevenueBase Database · checked Sep 27, 2026
25Partial evidencePl, NetherlandsHQ checked Sep 27, 2026201-5004 contacts →

Partial evidence

“Eviden Digital Security NL (voorheen Motiv) is dé cybersecurity-specialist die organisaties in de publieke en private sector voorziet van IT- beveiligingsoplossingen en –diensten…”

Source: RevenueBase Database · checked Sep 27, 2026

Showing 25 of 147 cms security consulting companies based in the Netherlands

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Cms security consulting companies based in the Netherlands at a glance

As of Sep 27, 2026
25.8%Verified-email coverage
7.3Average contacts per company
1-10Median size (employees)
10.9%Largest-city concentration · Amsterdam
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
111
11-50
27
51-200
6
201-500
3

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 147 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 cms security consulting 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 “cms security consulting 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 cms security consulting 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 cms security consulting 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, 278 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 27, 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 cms security consulting 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 cms security consulting companies are there based in the Netherlands?

RevenueBase identified 147 cms security consulting 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?

Tesorion, headquartered in Nieuwegein, tops this list with the largest team on record.

Which city has the most cms security consulting companies?

Amsterdam leads with 16 headquartered companies, followed by Nijmegen (5) and Rotterdam (5).

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 278 verified decision-maker contacts tracked across these 147 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 27, 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.