Company lists · Data refreshed September 2026

Top 25 Iot security testing companies based in the Netherlands

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 96 companies tracked

RevenueBase identified 96 iot security testing companies headquartered in the Netherlands as of September 2026 and tracks 993 professional contacts across them, including 231 with verified work emails. Amsterdam is the largest hub.

This list covers iot security testing 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 28, 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 28, 2026 86% judged on-target in blind review

96Companies

993Contacts tracked

231Verified emails

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The 25 largest iot security testing companies based in the Netherlands

Ranked by team size

Top 25 of 96 iot security testing companies based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to iot security testing 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	Spritecloud	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 28, 2026	51-200	60 contacts →
	Indirect evidence “Test your software, not your reputation!” Source: RevenueBase Database · checked Sep 28, 2026
2	Surelock IT Security Services	Partial evidence	3447gg, NetherlandsHQ checked Sep 28, 2026	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 Sep 28, 2026
3	Zerocopter	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 28, 2026	11-50	35 contacts →
	Partial evidence “Working as ethical hackers and security researchers over the past decade we learned that online security became a Wild West for companies.” Source: RevenueBase Database · checked Sep 28, 2026
4	Securify	Strong evidence	Amsterdam, NetherlandsHQ checked Sep 28, 2026	11-50	34 contacts →
	Strong 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 28, 2026
5	The S-Unit	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
6	LBVD	Partial evidence	Delft, NetherlandsHQ checked Sep 28, 2026	11-50	25 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 28, 2026
7	Riscure	Partial evidence	Xj, NetherlandsHQ checked Sep 28, 2026	51-200	23 contacts →
	Partial evidence “Riscure is an independent security laboratory founded in 2001 with customers in North America, Europe and Asia.” Source: RevenueBase Database · checked Sep 28, 2026
8	Dongit	Strong evidence	Leiden, NetherlandsHQ checked Sep 28, 2026	11-50	18 contacts →
	Strong 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 28, 2026
9	Reqon B.V	Indirect evidence	Leiderdorp, NetherlandsHQ checked Sep 28, 2026	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 28, 2026
10	Sirius Security	Partial evidence	Alkmaar, NetherlandsHQ checked Sep 28, 2026	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 Sep 28, 2026
11	Whitehats B.V	Indirect evidence	Eindhoven, NetherlandsHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “We are eager to use our expertise to create a digital world where information is secure and websites are reliable.” Source: RevenueBase Database · checked Sep 28, 2026
12	Secwatch B.V	Partial evidence	Almere, NetherlandsHQ checked Sep 28, 2026	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 Sep 28, 2026
13	Sekurno Cybersecurity	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 28, 2026	1-10	11 contacts →
	Partial evidence “Sekurno is a cybersecurity company that provides security services beyond mere compliance.” Source: RevenueBase Database · checked Sep 28, 2026
14	Cyber Cloud	Indirect evidence	Bleskensgraaf, NetherlandsHQ checked Sep 28, 2026	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 Sep 28, 2026
15	Txone Networks Dach	Indirect evidence	Eindhoven, NetherlandsHQ checked Sep 28, 2026	201-500	9 contacts →
	Indirect evidence “TXOne Networks bietet OT-native All-Terrain-Cybersicherheitslösungen, die die Zuverlässigkeit und Sicherheit von ICS-Umgebungen durch die OT-Zero-Trust-Methodik gewährleisten.” Source: RevenueBase Database · checked Sep 28, 2026
16	ONVIO	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “Onvio is dé specialist in het uitvoeren van Pentesten.” Source: RevenueBase Database · checked Sep 28, 2026
17	Websec B.V	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “WebSec is an all-in-one security company.” Source: RevenueBase Database · checked Sep 28, 2026
18	Expliot	Strong evidence	The Hague, NetherlandsHQ checked Sep 28, 2026	1-10	7 contacts →
	Strong evidence “EXPLIoT: Empowering a cyber-safe future for humans and machines Join the forefront of IoT security with EXPLIoT, where cutting-edge technology meets comprehensive solutions.” Source: RevenueBase Database · checked Sep 28, 2026
19	Hackdefense	Indirect evidence	Leiden, NetherlandsHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “HackDefense is sinds 2023 onderdeel van Securance.” Source: RevenueBase Database · checked Sep 28, 2026
20	Blueprint Cyber Security	Strong evidence	The Hague, NetherlandsHQ checked Sep 28, 2026	11-50	6 contacts →
	Strong evidence “Blueprint Security specialises in manual penetration testing and multiple IT security certification consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
21	Secured By Design	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 28, 2026	11-50	6 contacts →
	Indirect evidence “Is uw infrastructuur bestand tegen cybercrime?” Source: RevenueBase Database · checked Sep 28, 2026
22	Shellback	Partial evidence	Weert, NetherlandsHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Shellback is an enthusiastic and dedicated team of security specialists based in Weert.” Source: RevenueBase Database · checked Sep 28, 2026
23	Threatlabs	Partial evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
24	CREDS	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Al 10 jaar is CREDS dé kennispartner op het gebied van offensieve cybersecurity-oplossingen voor organisaties waar een veilige digitale infrastructuur cruciaal is voor de…” Source: RevenueBase Database · checked Sep 28, 2026
25	Tozetta	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Welkom op ons Tozetta bedrijfsprofiel.” Source: RevenueBase Database · checked Sep 28, 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: iot security testing 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 iot security testing companies.
Partial evidence: Its own public description names part of iot security testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name iot security testing 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 96 iot security testing companies based in the Netherlands

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Iot security testing companies based in the Netherlands at a glance

As of Sep 28, 2026

23.3%Verified-email coverage

10.3Average contacts per company

1-10Median size (employees)

19.8%Largest-city concentration · Amsterdam

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 96 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 iot security testing 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 “iot security testing 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 iot security testing 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 iot security testing 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, 231 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 28, 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 iot security testing 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 iot security testing companies are there based in the Netherlands?

RevenueBase identified 96 iot security testing 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?

Spritecloud, headquartered in Amsterdam, tops this list with the largest team on record.

Which city has the most iot security testing companies?

Amsterdam leads with 19 headquartered companies, followed by The Hague (4) and Delft (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 231 verified decision-maker contacts tracked across these 96 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 28, 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.