Company lists · Data refreshed September 2026

Top 25 Cybersecurity defense companies based in the Netherlands

Name: Cybersecurity defense companies 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 303 companies tracked

RevenueBase identified 303 cybersecurity defense companies headquartered in the Netherlands as of September 2026 and tracks 21,856 professional contacts across them, including 12,215 with verified work emails and 6,417 with mobile numbers. Amsterdam is the largest hub.

This list covers cybersecurity defense 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 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

303Companies

21,856Contacts tracked

12,215Verified emails

6,417Mobile numbers

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The 25 largest cybersecurity defense companies based in the Netherlands

Ranked by team size

Top 25 of 303 cybersecurity defense companies 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 defense 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Palo Alto Networks	Partial evidence	He, Netherlands	10001+	18,430 contacts →
	Partial evidence “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Source: RevenueBase Database · checked Sep 1, 2026
2	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
3	Fox-It	Partial evidence	Gk, Netherlands	201-500	237 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 1, 2026
4	EYE Security	Indirect evidence	Den Haag, Netherlands	201-500	210 contacts →
	Indirect evidence “Eye Security protects small and medium-sized European enterprises from cyber threats and the high costs that follow after a successful attack.” Source: RevenueBase Database · checked Sep 1, 2026
5	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
6	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
7	Tesorion	Indirect evidence	Nieuwegein, Netherlands	51-200	92 contacts →
	Indirect evidence “Tesorion is een Nederlandse, onafhankelijke Managed Security Services Provider (MSSP).” Source: RevenueBase Database · checked Sep 1, 2026
8	On2it Cybersecurity	Partial evidence	Lj, Netherlands	51-200	83 contacts →
	Partial evidence “ON2IT is a global pure-play cybersecurity service provider.” Source: RevenueBase Database · checked Sep 1, 2026
9	Nedscaper	Partial evidence	Amsterdam, Netherlands	51-200	59 contacts →
	Partial evidence “Nedscaper delivers pragmatic, accessible cybersecurity services across Europe and Africa.” Source: RevenueBase Database · checked Sep 1, 2026
10	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
11	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
12	Bgtek Cyber Security	Indirect evidence	Xw, Netherlands	11-50	33 contacts →
	Indirect evidence “BG-TEK was established in 2010 with the aim of providing cyber security services and developing cyber security products.” Source: RevenueBase Database · checked Sep 1, 2026
13	Tachyon Security BV	Indirect evidence	Rijswijk, Netherlands	11-50	27 contacts →
	Indirect evidence “Tachyon Security BV is based just outside The Hague in the Netherlands.” Source: RevenueBase Database · checked Sep 1, 2026
14	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
15	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
16	Un1quely	Indirect evidence	Netherlands	11-50	23 contacts →
	Indirect evidence “Founded in 2021 as a member of BrightMarbles Holding group from Rotterdam, Netherlands.” Source: RevenueBase Database · checked Sep 1, 2026
17	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
18	SPL	Indirect evidence	Arnhem, Netherlands	11-50	20 contacts →
	Indirect evidence “Digitale veiligheid is van levensbelang voor bedrijven, de maatschappij en de mens.” Source: RevenueBase Database · checked Sep 1, 2026
19	Falconforce	Indirect evidence	Utrecht, Netherlands	11-50	20 contacts →
	Indirect evidence “Want to take your company’s digital security to the next level?” Source: RevenueBase Database · checked Sep 1, 2026
20	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
21	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
22	Route443	Partial evidence	Heerlen, Netherlands	11-50	16 contacts →
	Partial evidence “Route443 – Uw Cybersecurity Crime Fighters Bij Route443 beschouwen we onszelf als de onverschrokken misdaadbestrijders van het digitale tijdperk.” Source: RevenueBase Database · checked Sep 1, 2026
23	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
24	Applied Risk	Indirect evidence	Ej, Netherlands	11-50	14 contacts →
	Indirect evidence “A DNV company.” Source: RevenueBase Database · checked Sep 1, 2026
25	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

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 defense companies. 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 defense companies.
Partial evidence: Its own public description names part of cybersecurity defense companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity defense companies. 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 303 cybersecurity defense companies based in the Netherlands

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Cybersecurity defense companies based in the Netherlands at a glance

As of Sep 1, 2026

55.9%Verified-email coverage

29.4%Mobile-number coverage

72.1Average contacts per company

1-10Median size (employees)

9.9%Largest-city concentration · Amsterdam

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

191

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 defense 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 “cybersecurity defense 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 cybersecurity defense 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 cybersecurity defense 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, 12,215 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 defense companies by metro

Cybersecurity defense companies in Amsterdam30

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 defense 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 cybersecurity defense companies are there based in the Netherlands?

RevenueBase identified 303 cybersecurity defense 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?

Palo Alto Networks, headquartered in He, tops this list with the largest team on record.

Which city has the most cybersecurity defense companies?

Amsterdam leads with 30 headquartered companies, followed by Eindhoven (12) and Rotterdam (11).

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 12,215 verified decision-maker contacts tracked across these 303 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.