Company lists · Data refreshed September 2026

Top 25 Cybersecurity risk assessment firms based in the Netherlands

Name: Cybersecurity risk assessment firms based in the Netherlands
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 342 companies tracked

RevenueBase identified 342 cybersecurity risk assessment firms headquartered in the Netherlands as of September 2026 and tracks 2,627 professional contacts across them, including 814 with verified work emails and 152 with mobile numbers. Amsterdam is the largest hub.

This list covers cybersecurity risk assessment firms 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

342Companies

2,627Contacts tracked

814Verified emails

152Mobile numbers

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The 25 largest cybersecurity risk assessment firms based in the Netherlands

Ranked by team size

Top 25 of 342 cybersecurity risk assessment firms based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity risk assessment firms: 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	Outpost24	Partial evidence	Xx, Netherlands	201-500	276 contacts →
	Partial evidence “Outpost24 is a leading global provider of cybersecurity solutions, encompassing two specialized divisions to deliver comprehensive exposure and access management.” Source: RevenueBase Database · checked Sep 1, 2026
2	Fox-It	Indirect evidence	Gk, Netherlands	201-500	237 contacts →
	Indirect 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 1, 2026
3	Comsec	Partial evidence	Amsterdam, Netherlands	51-200	140 contacts →
	Partial evidence “Comsec is a leading global cybersecurity consultancy.” Source: RevenueBase Database · checked Sep 1, 2026
4	Breachlock, INC	Indirect evidence	Amsterdam, Netherlands	51-200	136 contacts →
	Indirect evidence “BreachLock is a global leader in Continuous Attack Surface Discovery and Penetration Testing.” Source: RevenueBase Database · checked Sep 1, 2026
5	Pinewood	Partial evidence	Xj, Netherlands	51-200	106 contacts →
	Partial evidence “Pinewood te Delft is al 28 jaar de specialist in cybersecurity en voor veel bedrijven en organisaties de one-stop security partner.” Source: RevenueBase Database · checked Sep 1, 2026
6	Hunt & Hackett	Indirect evidence	The Hague, Netherlands	51-200	40 contacts →
	Indirect evidence “Hunt & Hackett helps European companies prevent, detect and respond to today’s most advanced adversaries, safeguarding them against cyberthreats and espionage.” Source: RevenueBase Database · checked Sep 1, 2026
7	Securify	Partial evidence	Ca, Netherlands	11-50	38 contacts →
	Partial evidence “Penetration Testing \| Agile Security Testing \| Red Teaming Securify is a cybersecurity company with a team of professional and passionate ethical hackers, secure coding experts…” Source: RevenueBase Database · checked Sep 1, 2026
8	Surelock IT Security Services	Indirect evidence	Woerden, Netherlands	11-50	37 contacts →
	Indirect evidence “Surelock IT Security Services helpt organisatie inzicht te krijgen in de IT-kwetsbaarheden van hun organisatie.” Source: RevenueBase Database · checked Sep 1, 2026
9	Lemonshark Cybersecurity	Partial evidence	Utrecht, Netherlands	11-50	25 contacts →
	Partial evidence “Onze missie, visie & strategie Wij willen onze samenleving veiliger maken en dat doen we dankzij de zeer specialistische kennis van onze cybersecurity experts.” Source: RevenueBase Database · checked Sep 1, 2026
10	LBVD	Partial evidence	Delft, Netherlands	11-50	24 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 1, 2026
11	Threadstone Cyber Security	Partial evidence	Km, Netherlands	11-50	23 contacts →
	Partial evidence “ThreadStone is uw toonaangevende specialist op het gebied van cybersecurity.” Source: RevenueBase Database · checked Sep 1, 2026
12	Securesult	Indirect evidence	The Hague, Netherlands	11-50	19 contacts →
	Indirect evidence “Bij Securesult richten we ons op het bieden van hoogwaardige informatiebeveiligingsoplossingen voor organisaties van elke omvang.” Source: RevenueBase Database · checked Sep 1, 2026
13	Dongit	Indirect evidence	Xc, Netherlands	11-50	18 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 1, 2026
14	Reqon B.V	Indirect evidence	Leiderdorp, Netherlands	11-50	16 contacts →
	Indirect evidence “REQON is gespecialiseerd in het uitvoeren van technische beveiligingsonderzoeken in de vorm van (maatwerk) penetratietesten en exposure onderzoeken.” Source: RevenueBase Database · checked Sep 1, 2026
15	Signpost SIX	Partial evidence	The Hague, Netherlands	11-50	16 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 1, 2026
16	Cyber Seals	Indirect evidence	Utrecht, Netherlands	11-50	15 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 1, 2026
17	HOB ICT Security	Indirect evidence	Lopik, Netherlands	11-50	14 contacts →
	Indirect evidence “Bij HOB ICT Security werken we dagelijks aan het versterken van de weerbaarheid van middelgrote en grote organisaties tegen alle vormen van cyberdreigingen.” Source: RevenueBase Database · checked Sep 1, 2026
18	Schippers IT Your Digital Specialist	Indirect evidence	Oosterhout, Netherlands	11-50	13 contacts →
	Indirect evidence “Provide total peace of mind in the digital field.” Source: RevenueBase Database · checked Sep 1, 2026
19	MODAT	Partial evidence	Netherlands	11-50	13 contacts →
	Partial evidence “Founded in 2024, Modat is a European research-driven cybersecurity company focused on strengthening cyber resilience for individuals, companies, and governments.” Source: RevenueBase Database · checked Sep 1, 2026
20	Safetech P&r Groep	Indirect evidence	Jv, Netherlands	11-50	13 contacts →
	Indirect evidence “Safetech is een adviserend ingenieursbureau gespecialiseerd in beveiligingsadviezen.” Source: RevenueBase Database · checked Sep 1, 2026
21	Secwatch B.V	Indirect evidence	Almere, Netherlands	11-50	11 contacts →
	Indirect evidence “Even when your security is well underpinned, it remains important to remain alert to possible vulnerabilities, to the system's alerting and response capabilities and to the…” Source: RevenueBase Database · checked Sep 1, 2026
22	Masero Cyber Security	Indirect evidence	Veenendaal, Netherlands	11-50	11 contacts →
	Indirect evidence “De dreiging van cyberaanvallen is groot.” Source: RevenueBase Database · checked Sep 1, 2026
23	Incyber	Indirect evidence	Amersfoort, Netherlands	11-50	10 contacts →
	Indirect evidence “Geen wollige consultants of onnodig dure, fancy oplossingen, maar maatregelen die aansluiten bij jouw risico's en je beschermen tegen de dreigingen van vandaag en morgen.” Source: RevenueBase Database · checked Sep 1, 2026
24	Cyber Security Challengers	Partial evidence	Jd, Netherlands	11-50	9 contacts →
	Partial evidence “Cyber Security Challengers (CSC) is uw onafhankelijke cybersecurity expert en dienstverlener.” Source: RevenueBase Database · checked Sep 1, 2026
25	ONVIO	Indirect evidence	Gv, Netherlands	11-50	9 contacts →
	Indirect evidence “Onvio is dé specialist in het uitvoeren van Pentesten.” Source: RevenueBase Database · checked Sep 1, 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: cybersecurity risk assessment firms. 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 cybersecurity risk assessment firms.
Partial evidence: Its own public description names part of cybersecurity risk assessment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity risk assessment firms. 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 342 cybersecurity risk assessment firms based in the Netherlands

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Cybersecurity risk assessment firms based in the Netherlands at a glance

As of Sep 1, 2026

31.0%Verified-email coverage

5.8%Mobile-number coverage

7.7Average contacts per company

1-10Median size (employees)

11.4%Largest-city concentration · Amsterdam

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

250

11-50

51-200

201-500

1,001-5,000

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 cybersecurity risk assessment firms, 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 “cybersecurity risk assessment firms”. 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 cybersecurity risk assessment firms), 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 cybersecurity risk assessment firms, 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, 814 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 1, 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.

Cybersecurity risk assessment firms by metro

Cybersecurity risk assessment firms in Amsterdam39

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 cybersecurity risk assessment firms, 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 cybersecurity risk assessment firms are there based in the Netherlands?

RevenueBase identified 342 cybersecurity risk assessment firms 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?

Outpost24, headquartered in Xx, tops this list with the largest team on record.

Which city has the most cybersecurity risk assessment firms?

Amsterdam leads with 39 headquartered companies, followed by Utrecht (14) and The Hague (13).

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 814 verified decision-maker contacts tracked across these 342 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 1, 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.