Company lists · Data refreshed September 2026
Top 25 Security auditing firms based in the Netherlands
RevenueBase identified 282 security auditing firms headquartered in the Netherlands as of September 2026 and tracks 1,669 professional contacts across them, including 479 with verified work emails and 97 with mobile numbers. Amsterdam is the largest hub.
This list covers security auditing 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, how directly it supports the match, 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 SmartSearch, 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.
The 25 largest security auditing firms based in the Netherlands
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 104 | ||||
“Pinewood te Delft is al 28 jaar de specialist in cybersecurity en voor veel bedrijven en organisaties de one-stop security partner.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 60 | ||||
“U moet kunnen vertrouwen op de beschikbaarheid en veiligheid van uw bedrijfskritische systemen.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 37 | ||||
“Surelock IT Security Services helpt organisatie inzicht te krijgen in de IT-kwetsbaarheden van hun organisatie.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 27 | ||||
“Audittrail verzorgt audits voor en adviseert over de vakgebieden informatiebeveiliging, privacy, governance, risk & compliance en kwaliteit.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 25 | ||||
“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, 2026Thanks. The Data Team will review it. | |||||
| 6 | 23 | ||||
“ThreadStone is uw toonaangevende specialist op het gebied van cybersecurity.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 21 | ||||
“PuraSec levert expertise op het gebied van cybersecurity binnen de deelgebieden; mens, beleid en techniek.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 19 | ||||
“Defenced is the IT security knowledge partner for large and medium-sized organizations.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 19 | ||||
“Bij Securesult richten we ons op het bieden van hoogwaardige informatiebeveiligingsoplossingen voor organisaties van elke omvang.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 18 | ||||
“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, 2026Thanks. The Data Team will review it. | |||||
| 11 | 18 | ||||
“2-Control is an IT audit organization and offers support in providing insight into and improving the reliability of automated information.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 16 | ||||
“REQON is gespecialiseerd in het uitvoeren van technische beveiligingsonderzoeken in de vorm van (maatwerk) penetratietesten en exposure onderzoeken.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 15 | ||||
“At Cyber Seals, we believe in a digital world where you can work, innovate, and grow securely.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 15 | ||||
“Argis IT Consultants is your partner in IT Control.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 14 | ||||
“Bij HOB ICT Security werken we dagelijks aan het versterken van de weerbaarheid van middelgrote en grote organisaties tegen alle vormen van cyberdreigingen.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 14 | ||||
“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, 2026Thanks. The Data Team will review it. | |||||
| 17 | 13 | ||||
“Safetech is een adviserend ingenieursbureau gespecialiseerd in beveiligingsadviezen.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 12 | ||||
“De dreiging van cyberaanvallen is groot.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 12 | ||||
“Specialists from Sirius Security have all the skills to help enterprise organisations to secure their IT environment.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | 11 | ||||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 11 | ||||
“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, 2026Thanks. The Data Team will review it. | |||||
| 22 | 11 | ||||
“Risguard was founded by Thom, Wolbert and Jurgen, three experienced IT-audit professionals with over 25 years of combined experience in IT audit, IT risk management & IT…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 11 | ||||
“Anove stands at the forefront of digital security, boasting a rich legacy dating back to 1996.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 11 | ||||
“Sekurno is a cybersecurity company that provides security services beyond mere compliance.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 11 | ||||
“Cyber7 Cyber Security Consultancy” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 282 security auditing firms based in the Netherlands
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Security auditing firms based in the Netherlands at a glance
As of Sep 6, 2026Companies by employee count
Verified emails by last verification
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 security auditing firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “security auditing firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among security auditing 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 an evidence 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, 479 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.
Security auditing firms by metro
- Security auditing firms in Amsterdam28
Frequently asked
How many security auditing firms are there based in the Netherlands?
RevenueBase identified 282 security auditing 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?
Pinewood, headquartered in Xj, tops this list with the largest team on record.
Which city has the most security auditing firms?
Amsterdam leads with 28 headquartered companies, followed by Rotterdam (11) and Utrecht (10).
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 479 verified decision-maker contacts tracked across these 282 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.
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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 SmartSearch, 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.
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