Company lists · Data refreshed September 2026

Top 18 Infrastructure hardening contractors based in the Netherlands

RevenueBase identified 46 infrastructure hardening contractors headquartered in the Netherlands as of September 2026 and tracks 470 professional contacts across them, including 200 with verified work emails. Amsterdam is the largest hub.

This list covers infrastructure hardening contractors 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 17, 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 17, 2026 86% judged on-target in blind review
46Companies
470Contacts tracked
200Verified emails
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The 18 largest infrastructure hardening contractors based in the Netherlands

Ranked by team size
Top 18 of 46 infrastructure hardening contractors based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure hardening contractors: 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 17, 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 17, 2026
2Partial evidenceNoordwijk, NetherlandsHQ checked Sep 17, 202651-20026 contacts →

Partial evidence

“Bavak Security Group, founded in 1975, is a leading security systems integrator providing security solutions for critical infrastructure, government buildings and corporate…”

Source: RevenueBase Database · checked Sep 17, 2026
3Indirect evidenceRotterdam, NetherlandsHQ checked Sep 17, 202611-5023 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 17, 2026
4Indirect evidenceLeiden, NetherlandsHQ checked Sep 17, 202611-5018 contacts →

Indirect 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 17, 2026
5Indirect evidenceRotterdam, NetherlandsHQ checked Sep 17, 202611-5014 contacts →

Indirect 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 17, 2026
6Indirect evidenceWaddinxveen, NetherlandsHQ checked Sep 17, 202611-5013 contacts →

Indirect evidence

“Safetech is een adviserend ingenieursbureau gespecialiseerd in beveiligingsadviezen.”

Source: RevenueBase Database · checked Sep 17, 2026
7Indirect evidenceVolendam, NetherlandsHQ checked Sep 17, 202611-5010 contacts →

Indirect evidence

“ComSafe biedt de beste en voordeligste oplossingen op het terrein van beveiligingstechniek.”

Source: RevenueBase Database · checked Sep 17, 2026
8Indirect evidenceUddel, NetherlandsHQ checked Sep 17, 20261-107 contacts →

Indirect evidence

“Security Risk Watch staat voor een verfrissende, strategische en deskundige aanpak.”

Source: RevenueBase Database · checked Sep 17, 2026
9Indirect evidenceDinteloord, NetherlandsHQ checked Sep 17, 202611-505 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 17, 2026
10Indirect evidenceHj, NetherlandsHQ checked Sep 17, 202611-505 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 17, 2026
11Indirect evidenceVleuten, NetherlandsHQ checked Sep 17, 20261-104 contacts →

Indirect evidence

“At Secuza, we enable our customers in improving their business operations by leveraging our industry-wide experience, expertise in cutting-edge technology and an extensive…”

Source: RevenueBase Database · checked Sep 17, 2026
12Partial evidenceArnhem, NetherlandsHQ checked Sep 17, 202611-503 contacts →

Partial evidence

“Het is voor onze economie en samenleving essenstiel dat digitale infrastructuren betrouwbaar en beschikbaar zijn.”

Source: RevenueBase Database · checked Sep 17, 2026
13Indirect evidenceBest, NetherlandsHQ checked Sep 17, 20261-102 contacts →

Indirect evidence

“Pure Networks & Security is mainly a independent consulting company for networking and security.”

Source: RevenueBase Database · checked Sep 17, 2026
14Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 17, 20261-102 contacts →

Indirect evidence

“Stolwijk & Van Onselen Consultancy is het onafhankelijk beveiligingsadviesbureau voor de hoog residentiële markt, bedrijven, instellingen en organisaties.”

Source: RevenueBase Database · checked Sep 17, 2026
15Indirect evidenceCapelle Aan Den Ijssel, NetherlandsHQ checked Sep 17, 20261-102 contacts →

Indirect evidence

“Adviesbureau | Onderzoeksbureau Forta Nova is uw partner als het gaat om de veiligheid van u en wat u dierbaar is!”

Source: RevenueBase Database · checked Sep 17, 2026
16Indirect evidenceThe Hague, NetherlandsHQ checked Sep 17, 20261-101 contacts →

Indirect evidence

“vanderVoort Cyber Security is a cyber security consultancy firm specialized in helping clients getting in control of their cyber security.”

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

Indirect evidence

“Cyber Consult is a privately owned company that provides independent information security consulting, advice, and coaching to government agencies and private sector companies…”

Source: RevenueBase Database · checked Sep 17, 2026
18Indirect evidenceDedemsvaart, NetherlandsHQ checked Sep 17, 20261-101 contacts →

Indirect evidence

“0ver Yafsec Yafsec (zeg maar jaf-sek) is gespecialiseerd in het beveiligen van netwerkstructuren gekoppeld aan het Internet.”

Source: RevenueBase Database · checked Sep 17, 2026

Showing 18 of 46 infrastructure hardening contractors based in the Netherlands

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Infrastructure hardening contractors based in the Netherlands at a glance

As of Sep 17, 2026
42.6%Verified-email coverage
10.2Average contacts per company
1-10Median size (employees)
8.7%Largest-city concentration · Amsterdam
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
31
11-50
11
51-200
2
201-500
2

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 46 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 infrastructure hardening contractors, 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 “infrastructure hardening contractors”. 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 infrastructure hardening contractors), 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 infrastructure hardening contractors, 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, 200 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 17, 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 infrastructure hardening contractors, 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 infrastructure hardening contractors are there based in the Netherlands?

RevenueBase identified 46 infrastructure hardening contractors 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 infrastructure hardening contractors?

Amsterdam leads with 4 headquartered companies, followed by Groningen (2) and Ah (1).

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 200 verified decision-maker contacts tracked across these 46 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 17, 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.