Company lists · Data refreshed August 2026

Top 25 Api security companies based in the Netherlands

Name: Api security companies based in the Netherlands
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 112 companies tracked

RevenueBase identified 112 api security companies headquartered in the Netherlands as of August 2026 and tracks 1,232 professional contacts across them, including 385 with verified work emails and 59 with mobile numbers. Amsterdam is the largest hub.

This list covers api security 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 August 31, 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 Aug 31, 2026 86% judged on-target in blind review

112Companies

1,232Contacts tracked

385Verified emails

59Mobile numbers

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The 25 largest api security companies based in the Netherlands

Ranked by team size

Top 25 of 112 api security companies based in the Netherlands, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to api security 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	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 Aug 31, 2026
2	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 Aug 31, 2026
3	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 Aug 31, 2026
4	Surelock IT Security Services	Partial evidence	Woerden, Netherlands	11-50	37 contacts →
	Partial evidence “Surelock IT Security Services helpt organisatie inzicht te krijgen in de IT-kwetsbaarheden van hun organisatie.” Source: RevenueBase Database · checked Aug 31, 2026
5	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 Aug 31, 2026
6	Threadstone Cyber Security	Indirect evidence	Km, Netherlands	11-50	23 contacts →
	Indirect evidence “ThreadStone is uw toonaangevende specialist op het gebied van cybersecurity.” Source: RevenueBase Database · checked Aug 31, 2026
7	Dongit	Partial evidence	Xc, Netherlands	11-50	18 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 Aug 31, 2026
8	HOB ICT Security	Partial evidence	Lopik, Netherlands	11-50	14 contacts →
	Partial 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 Aug 31, 2026
9	Base Cyber Security	Partial evidence	Ak, Netherlands	11-50	14 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 Aug 31, 2026
10	Sirius Security	Partial evidence	Bj, Netherlands	1-10	12 contacts →
	Partial evidence “Specialists from Sirius Security have all the skills to help enterprise organisations to secure their IT environment.” Source: RevenueBase Database · checked Aug 31, 2026
11	Secwatch B.V	Partial evidence	Almere, Netherlands	11-50	11 contacts →
	Partial 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 Aug 31, 2026
12	Sofecta Labs	Partial evidence	Amsterdam, Netherlands	1-10	11 contacts →
	Partial evidence “Introducing Sofecta Labs, the premier spin-off from Sofecta, dedicated to revolutionizing cyber security solutions for businesses.” Source: RevenueBase Database · checked Aug 31, 2026
13	Cyber Cloud	Indirect evidence	Bleskensgraaf, Netherlands	1-10	10 contacts →
	Indirect evidence “Cyber Cloud is een jong, ambitieus en innovatief bedrijf, gespecialiseerd in het uitvoeren van technische testen met als doel kwetsbaarheden in uw (web/mobiele)applicaties…” Source: RevenueBase Database · checked Aug 31, 2026
14	Linksecure	Indirect evidence	Vj, Netherlands	1-10	10 contacts →
	Indirect evidence “Hoe vatbaar is jouw organisatie voor hacks?” Source: RevenueBase Database · checked Aug 31, 2026
15	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 Aug 31, 2026
16	Cert2connect	Partial evidence	Ad, Netherlands	1-10	9 contacts →
	Partial evidence “Cert2Connect BV is the go-to party in the field of advanced digital security solutions, security services and cyber security.” Source: RevenueBase Database · checked Aug 31, 2026
17	ONVIO	Indirect evidence	Gv, Netherlands	11-50	9 contacts →
	Indirect evidence “Onvio is dé specialist in het uitvoeren van Pentesten.” Source: RevenueBase Database · checked Aug 31, 2026
18	Data4 Cyber Security	Indirect evidence	Maastricht-Airport, Netherlands	11-50	8 contacts →
	Indirect evidence “Zoekt u digitale rust en zekerheid?” Source: RevenueBase Database · checked Aug 31, 2026
19	Attic Security	Indirect evidence	Cj, Netherlands	11-50	7 contacts →
	Indirect evidence “With Attic, the hacking experts from Zolder provide organizations with high-end cybersecurity operations.” Source: RevenueBase Database · checked Aug 31, 2026
20	Nerium	Partial evidence	Ae, Netherlands	1-10	7 contacts →
	Partial evidence “Nerium is a cyber security company specialized in monitoring, detecting, and responding to digital attacks.” Source: RevenueBase Database · checked Aug 31, 2026
21	Websec B.V	Partial evidence	Cd, Netherlands	11-50	7 contacts →
	Partial evidence “WebSec is an all-in-one security company.” Source: RevenueBase Database · checked Aug 31, 2026
22	Netboss BV	Indirect evidence	Dx, Netherlands	11-50	6 contacts →
	Indirect evidence “NetBoss is committed to assisting companies, in the era of a growing number of Artificial Intelligence solutions, to understand potential cybersecurity risks that could directly…” Source: RevenueBase Database · checked Aug 31, 2026
23	Symmetry Cyber Intelligence	Partial evidence	Amsterdam, Netherlands	1-10	6 contacts →
	Partial evidence “Symmetry: Security, Assured.” Source: RevenueBase Database · checked Aug 31, 2026
24	Cqure Consulting	Indirect evidence	Hj, Netherlands	11-50	5 contacts →
	Indirect evidence “Het internet ontvouwt zich sinds de jaren 90 in razendsnel tempo.” Source: RevenueBase Database · checked Aug 31, 2026
25	Shellback	Partial evidence	Ea, Netherlands	1-10	5 contacts →
	Partial evidence “Shellback is an enthusiastic and dedicated team of security specialists based in Weert.” Source: RevenueBase Database · checked Aug 31, 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: api security 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 api security companies.
Partial evidence: Its own public description names part of api security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name api security 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 112 api security companies based in the Netherlands

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Api security companies based in the Netherlands at a glance

As of Aug 31, 2026

31.2%Verified-email coverage

4.8%Mobile-number coverage

11.0Average contacts per company

1-10Median size (employees)

17.0%Largest-city concentration · Amsterdam

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 api security 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 “api security 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 api security 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 api security 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, 385 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 August 31, 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 api security 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 api security companies are there based in the Netherlands?

RevenueBase identified 112 api security companies headquartered in the Netherlands as of August 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 api security companies?

Amsterdam leads with 19 headquartered companies, followed by Groningen (4) and Rotterdam (3).

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 385 verified decision-maker contacts tracked across these 112 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.