Company lists · Data refreshed September 2026

Top 25 Software vulnerability assessment companies based in the Netherlands

RevenueBase identified 123 software vulnerability assessment companies headquartered in the Netherlands as of September 2026 and tracks 845 professional contacts across them, including 233 with verified work emails and 52 with mobile numbers. Amsterdam is the largest hub.

This list covers software vulnerability assessment 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 6, 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 6, 2026 86% judged on-target in blind review
123Companies
845Contacts tracked
233Verified emails
52Mobile numbers
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest software vulnerability assessment companies based in the Netherlands

Ranked by team size
Top 25 of 123 software vulnerability assessment companies based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to software vulnerability assessment 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
1Indirect evidence3447gg, NetherlandsHQ checked Sep 6, 202611-5037 contacts →

“Surelock IT Security Services helpt organisatie inzicht te krijgen in de IT-kwetsbaarheden van hun organisatie.”

Source: company website · checked Sep 6, 2026
2Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 6, 202611-5034 contacts →

“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: company website · checked Sep 6, 2026
3Indirect evidenceUtrecht, NetherlandsHQ checked Sep 6, 202611-5028 contacts →

“Omdat IT van onschatbare waarde is om commerciële en maatschappelijke doelen te verwezenlijken zijn pogingen om onrechtmatige toegang tot uw informatie te krijgen helaas aan de…”

Source: company website · checked Sep 6, 2026
4Indirect evidenceDelft, NetherlandsHQ checked Sep 6, 202611-5025 contacts →

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

Source: company website · checked Sep 6, 2026
5Indirect evidenceRotterdam, NetherlandsHQ checked Sep 6, 202611-5023 contacts →

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

Source: company website · checked Sep 6, 2026
6Partial evidenceLeiden, NetherlandsHQ checked Sep 6, 202611-5018 contacts →

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

Source: company website · checked Sep 6, 2026
7Indirect evidenceLeiderdorp, NetherlandsHQ checked Sep 6, 202611-5016 contacts →

“REQON is gespecialiseerd in het uitvoeren van technische beveiligingsonderzoeken in de vorm van (maatwerk) penetratietesten en exposure onderzoeken.”

Source: company website · checked Sep 6, 2026
8Indirect evidenceUtrecht, NetherlandsHQ checked Sep 6, 202611-5015 contacts →

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

Source: company website · checked Sep 6, 2026
9Indirect evidenceRotterdam, NetherlandsHQ checked Sep 6, 202611-5014 contacts →

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

Source: company website · checked Sep 6, 2026
10Indirect evidenceEindhoven, NetherlandsHQ checked Sep 6, 202611-5011 contacts →

“We are eager to use our expertise to create a digital world where information is secure and websites are reliable.”

Source: company website · checked Sep 6, 2026
11Partial evidenceAlmere, NetherlandsHQ checked Sep 6, 202611-5011 contacts →

“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: company website · checked Sep 6, 2026
12Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 6, 20261-1011 contacts →

“Sekurno is a cybersecurity company that provides security services beyond mere compliance.”

Source: company website · checked Sep 6, 2026
13Indirect evidenceCapelle Aan Den Ijssel, NetherlandsHQ checked Sep 6, 20261-1011 contacts →

“Cyber7 Cyber Security Consultancy”

Source: company website · checked Sep 6, 2026
14Indirect evidenceAbcoude, NetherlandsHQ checked Sep 6, 202611-5010 contacts →

“Cyber Security Challengers (CSC) is uw onafhankelijke cybersecurity expert en dienstverlener.”

Source: company website · checked Sep 6, 2026
15Indirect evidenceBleskensgraaf, NetherlandsHQ checked Sep 6, 20261-1010 contacts →

“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: company website · checked Sep 6, 2026
16Indirect evidenceRoelofarendsveen, NetherlandsHQ checked Sep 6, 20261-1010 contacts →

“Hoe vatbaar is jouw organisatie voor hacks?”

Source: company website · checked Sep 6, 2026
17Indirect evidenceUtrecht, NetherlandsHQ checked Sep 6, 202611-509 contacts →

“Onvio is dé specialist in het uitvoeren van Pentesten.”

Source: company website · checked Sep 6, 2026
18Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 6, 202611-508 contacts →

“WebSec is an all-in-one security company.”

Source: company website · checked Sep 6, 2026
19Indirect evidenceZevenbergen, NetherlandsHQ checked Sep 6, 202611-507 contacts →

“With Attic, the hacking experts from Zolder provide organizations with high-end cybersecurity operations.”

Source: company website · checked Sep 6, 2026
20Indirect evidenceAlmere, NetherlandsHQ checked Sep 6, 202611-506 contacts →

“Rootsec brengt aan de hand van Penetratietesten de risico’s en kwetsbaarheden binnen uw IT-omgeving in kaart.”

Source: company website · checked Sep 6, 2026
21Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 6, 202611-506 contacts →

“Is uw infrastructuur bestand tegen cybercrime?”

Source: company website · checked Sep 6, 2026
22Indirect evidenceThe Hague, NetherlandsHQ checked Sep 6, 202611-506 contacts →

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

Source: company website · checked Sep 6, 2026
23Partial evidenceAmsterdam, NetherlandsHQ checked Sep 6, 20261-105 contacts →

“The Catcher24 Scanner identifies vulnerabilities so you will quickly know when you are at risk.”

Source: company website · checked Sep 6, 2026
24Indirect evidenceWeert, NetherlandsHQ checked Sep 6, 20261-105 contacts →

“Shellback is an enthusiastic and dedicated team of security specialists based in Weert.”

Source: company website · checked Sep 6, 2026
25Strong evidenceUtrecht, NetherlandsHQ checked Sep 6, 20261-104 contacts →

“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: company website · checked Sep 6, 2026

Showing 25 of 123 software vulnerability assessment companies based in the Netherlands

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 233 reachable decision-makers.

Free signup · no credit card

View the full list →

Software vulnerability assessment companies based in the Netherlands at a glance

As of Sep 6, 2026
27.6%Verified-email coverage
6.2%Mobile-number coverage
6.9Average contacts per company
1-10Median size (employees)
16.3%Largest-city concentration · Amsterdam
Sep 6, 2026Page data refreshed

Companies by employee count

1-10
87
11-50
33
51-200
2
201-500
1

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 software vulnerability assessment 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 “software vulnerability assessment 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 software vulnerability assessment 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 software vulnerability assessment 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, 233 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 6, 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 software vulnerability assessment 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 software vulnerability assessment companies are there based in the Netherlands?

RevenueBase identified 123 software vulnerability assessment 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?

Surelock IT Security Services, headquartered in Woerden, tops this list with the largest team on record.

Which city has the most software vulnerability assessment companies?

Amsterdam leads with 20 headquartered companies, followed by Rotterdam (5) and Utrecht (4).

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 233 verified decision-maker contacts tracked across these 123 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 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 123 software vulnerability assessment companies based in the Netherlands. Start with a free account, no credit card.

Download this list →

Related lists

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.