Company lists · Data refreshed September 2026
Top 21 Website security monitoring services based in the Netherlands
RevenueBase identified 48 company matches for website security monitoring services associated with the Netherlands as of September 2026 and tracks 217 professional contacts across them, including 67 with verified work emails. Amsterdam is the largest hub.
This list covers company matches for website security monitoring services associated with the Netherlands, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 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 21 largest website security monitoring services based in the Netherlands
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 18 contacts → | ||||
Exact match “DongIT is an independent web security and web development company specializing in penetration testing, secure software development, and custom-built web applications.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 2 | 18 contacts → | ||||
Exact match “The Dark Entry Digital Risk Protection platform provides a unified,intelligence-driven approach by continuously monitoring the external digital ecosystem and transforming…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 3 | 12 contacts → | ||||
Exact match “Specialists from Sirius Security have all the skills to help enterprise organisations to secure their IT environment.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 4 | 12 contacts → | ||||
Exact match “Nixon Digital helps organizations get instant clarity on website privacy, security, and control across single websites and large portfolios.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 5 | 11 contacts → | ||||
Exact match “We are eager to use our expertise to create a digital world where information is secure and websites are reliable.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 6 | 9 contacts → | ||||
Exact match “Your IT infrastructure is essential to your operation.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 7 | 8 contacts → | ||||
Exact match “Keeping your web applications secure is vitally important for business those days.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 8 | 8 contacts → | ||||
Exact match “Passguard detects infostealer infections before attackers sell your access on criminal marketplaces.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 9 | 7 contacts → | ||||
Exact match “With Attic, the hacking experts from Zolder provide organizations with high-end cybersecurity operations.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 10 | 7 contacts → | ||||
Exact match “Nerium is a cyber security company specialized in monitoring, detecting, and responding to digital attacks.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 11 | 5 contacts → | ||||
Exact match “The Catcher24 Scanner identifies vulnerabilities so you will quickly know when you are at risk.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 12 | 5 contacts → | ||||
Exact match “Welcome to Neo Security (a Korper ICT company); your partner in cutting-edge cybersecurity and data protection.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 13 | 5 contacts → | ||||
Exact match “Shellback is an enthusiastic and dedicated team of security specialists based in Weert.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 14 | 4 contacts → | ||||
Exact match “Stel je voor, ergens in het digitale universum waarin we leven, zijn er sluwe hackers die de boel willen verstoren.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 15 | 3 contacts → | ||||
Exact match “Someone opened a bad spreadsheet"-should never be the reason why your entire customer base can't work.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 16 | 3 contacts → | ||||
Exact match “Wij van Mijn Bedrijf Online bieden hoogwaardige online diensten.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 17 | 1 contacts → | ||||
Exact match “Good information security starts with a complete overview.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 18 | 1 contacts → | ||||
Exact match “We provide you with a constant, realtime overview of your current security position to withstand the latest threats.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 19 | 1 contacts → | ||||
Exact match “The most complete email hardening platform available” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 20 | 1 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 21 | 1 contacts → | ||||
Exact match “0ver Yafsec Yafsec (zeg maar jaf-sek) is gespecialiseerd in het beveiligen van netwerkstructuren gekoppeld aan het Internet.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “website security monitoring services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 21 of 48 website security monitoring services based in the Netherlands
See the full list, filter by size, metro and specialty, and access 67 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Website security monitoring services based in the Netherlands at a glance
As of Sep 29, 2026Companies by employee count
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 48 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- 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
- Company records associated with the Netherlands whose business descriptions match “website security monitoring services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 67 professional contacts with verified work emails across the full matched dataset. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “website security monitoring services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many website security monitoring services are there based in the Netherlands?
RevenueBase identified 48 company matches for website security monitoring services associated with the Netherlands as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Dongit tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most website security monitoring services?
Amsterdam leads with 4 company records, followed by Rotterdam (3) and Ae (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 67 professional contacts with verified work emails tracked across these 48 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.
Ready to reach these companies? Verified emails and direct dials for all 48 website security monitoring services based in the Netherlands. Start with a free account, no credit card.
Download this list →Related lists
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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.
More company lists
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- New lists
- Website security monitoring services based in London, United Kingdom
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Company intelligence · public preview
Top 21 website security monitoring services based in the Netherlands
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 48 matching company records for website security monitoring services based in the Netherlands, with 217 tracked contacts and 67 verified work emails.
This public preview shows 21 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 29, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 21 website security monitoring services based in the Netherlands
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Dongitdongit.euHQ: Leiden, NetherlandsReported employees: 11-50 | Leiden, Netherlands | 11-50 | Exact match | 18 contacts → |
“DongIT is an independent web security and web development company specializing in penetration testing, secure software development, and custom-built web applications.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Dark Entrydarkentry.netHQ: Amsterdam, NetherlandsReported employees: 11-50 | Amsterdam, Netherlands | 11-50 | Exact match | 18 contacts → |
“The Dark Entry Digital Risk Protection platform provides a unified,intelligence-driven approach by continuously monitoring the external digital ecosystem and transforming…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Sirius Securitysiriussecurity.nlHQ: Alkmaar, NetherlandsReported employees: 1-10 | Alkmaar, Netherlands | 1-10 | Exact match | 12 contacts → |
“Specialists from Sirius Security have all the skills to help enterprise organisations to secure their IT environment.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Nixon Digitalnixondigital.ioHQ: Alkmaar, NetherlandsReported employees: 11-50 | Alkmaar, Netherlands | 11-50 | Exact match | 12 contacts → |
“Nixon Digital helps organizations get instant clarity on website privacy, security, and control across single websites and large portfolios.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Whitehats B.Vwhitehats.nlHQ: Eindhoven, NetherlandsReported employees: 11-50 | Eindhoven, Netherlands | 11-50 | Exact match | 11 contacts → |
“We are eager to use our expertise to create a digital world where information is secure and websites are reliable.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Guardian360 B.Vguardian360.euHQ: Rotterdam, NetherlandsReported employees: 11-50 | Rotterdam, Netherlands | 11-50 | Exact match | 9 contacts → |
“Your IT infrastructure is essential to your operation.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Websafety Ninjawebsafetyninja.comHQ: Reuver, NetherlandsReported employees: 11-50 | Reuver, Netherlands | 11-50 | Exact match | 8 contacts → |
“Keeping your web applications secure is vitally important for business those days.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Passguardpassguard.comHQ: Leusden, NetherlandsReported employees: 1-10 | Leusden, Netherlands | 1-10 | Exact match | 8 contacts → |
“Passguard detects infostealer infections before attackers sell your access on criminal marketplaces.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Attic Securityatticsecurity.comHQ: Zevenbergen, NetherlandsReported employees: 11-50 | Zevenbergen, Netherlands | 11-50 | Exact match | 7 contacts → |
“With Attic, the hacking experts from Zolder provide organizations with high-end cybersecurity operations.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Neriumnerium.nlHQ: Eindhoven, NetherlandsReported employees: 1-10 | Eindhoven, Netherlands | 1-10 | Exact match | 7 contacts → |
“Nerium is a cyber security company specialized in monitoring, detecting, and responding to digital attacks.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Catcher24catcher24.comHQ: Amsterdam, NetherlandsReported employees: 1-10 | Amsterdam, Netherlands | 1-10 | Exact match | 5 contacts → |
“The Catcher24 Scanner identifies vulnerabilities so you will quickly know when you are at risk.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  NEO Securityneosecurity.nlHQ: Amsterdam, NetherlandsReported employees: 11-50 | Amsterdam, Netherlands | 11-50 | Exact match | 5 contacts → |
“Welcome to Neo Security (a Korper ICT company); your partner in cutting-edge cybersecurity and data protection.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Shellbackshellback.nlHQ: Weert, NetherlandsReported employees: 1-10 | Weert, Netherlands | 1-10 | Exact match | 5 contacts → |
“Shellback is an enthusiastic and dedicated team of security specialists based in Weert.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Cyberantcyberant.comHQ: Zeewolde, NetherlandsReported employees: 1-10 | Zeewolde, Netherlands | 1-10 | Exact match | 4 contacts → |
“Stel je voor, ergens in het digitale universum waarin we leven, zijn er sluwe hackers die de boel willen verstoren.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Securityhivesecurityhive.ioHQ: Rotterdam, NetherlandsReported employees: 11-50 | Rotterdam, Netherlands | 11-50 | Exact match | 3 contacts → |
“Someone opened a bad spreadsheet"-should never be the reason why your entire customer base can't work.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Mijn Bedrijf Online B.Vmijnbedrijf.onlineHQ: Oosterhout, NetherlandsReported employees: 1-10 | Oosterhout, Netherlands | 1-10 | Exact match | 3 contacts → |
“Wij van Mijn Bedrijf Online bieden hoogwaardige online diensten.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Cynalytics B.Vcynalytics.nlHQ: Capelle Aan Den Ijssel, NetherlandsReported employees: 1-10 | Capelle Aan Den Ijssel, Netherlands | 1-10 | Exact match | 1 contacts → |
“Good information security starts with a complete overview.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | hackurity.iohackurity.io HQ: Rotterdam, NetherlandsReported employees: 1-10 | Rotterdam, Netherlands | 1-10 | Exact match | 1 contacts → |
“We provide you with a constant, realtime overview of your current security position to withstand the latest threats.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Mailhardenermailhardener.com HQ: The Hague, NetherlandsReported employees: 1-10 | The Hague, Netherlands | 1-10 | Exact match | 1 contacts → |
“The most complete email hardening platform available” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Vabru Administratiekantoor BVvabru.nl HQ: Vianen, NetherlandsReported employees: 1-10 | Vianen, Netherlands | 1-10 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 21 |  Yafsecyafsec.comHQ: Dedemsvaart, NetherlandsReported employees: 1-10 | Dedemsvaart, Netherlands | 1-10 | Exact match | 1 contacts → |
“0ver Yafsec Yafsec (zeg maar jaf-sek) is gespecialiseerd in het beveiligen van netwerkstructuren gekoppeld aan het Internet.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 21 of 48 company matches
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Website security monitoring services: dataset insights
September 29, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
48 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 48 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 29, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for website security monitoring services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many website security monitoring services did RevenueBase find based in the Netherlands?
The saved snapshot records 48 matching company records, 217 tracked contacts and 67 verified emails. The public preview displays 21 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 29, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Website security monitoring services by geography
- Website security monitoring services based in London, United Kingdom
- Website security monitoring services based in Australia
- Website security monitoring services based in Brazil
- Website security monitoring services based in Canada
- Website security monitoring services based in France
- Website security monitoring services based in Germany
- Website security monitoring services based in India
- Website security monitoring services based in the United Kingdom
- Website security monitoring services based in the United States
Cite this list
RevenueBase Data Team. Top 21 website security monitoring services based in the Netherlands. Snapshot: September 29, 2026. https://revenuebase.ai/companies/website-security-monitoring-services/netherlands.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Website security monitoring services based in London, United Kingdom
- Website security monitoring services based in Australia
- Website security monitoring services based in Brazil
- Website security monitoring services based in Canada
- Website security monitoring services based in France
- Website security monitoring services based in Germany
Company intelligence · public preview
Top 21 website security monitoring services based in the Netherlands
RevenueBase records 48 matching company records for website security monitoring services based in the Netherlands, with 217 tracked contacts and 67 verified work emails.
This public preview shows 21 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 29, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 21 website security monitoring services based in the Netherlands
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Dongitdongit.eu HQ: Leiden, NetherlandsReported employees: 11-50 | Leiden, Netherlands | 11-50 | Exact match | 18 contacts → |
“DongIT is an independent web security and web development company specializing in penetration testing, secure software development, and custom-built web applications.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Dark Entrydarkentry.net HQ: Amsterdam, NetherlandsReported employees: 11-50 | Amsterdam, Netherlands | 11-50 | Exact match | 18 contacts → |
“The Dark Entry Digital Risk Protection platform provides a unified,intelligence-driven approach by continuously monitoring the external digital ecosystem and transforming…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Sirius Securitysiriussecurity.nl HQ: Alkmaar, NetherlandsReported employees: 1-10 | Alkmaar, Netherlands | 1-10 | Exact match | 12 contacts → |
“Specialists from Sirius Security have all the skills to help enterprise organisations to secure their IT environment.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Nixon Digitalnixondigital.io HQ: Alkmaar, NetherlandsReported employees: 11-50 | Alkmaar, Netherlands | 11-50 | Exact match | 12 contacts → |
“Nixon Digital helps organizations get instant clarity on website privacy, security, and control across single websites and large portfolios.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Whitehats B.Vwhitehats.nl HQ: Eindhoven, NetherlandsReported employees: 11-50 | Eindhoven, Netherlands | 11-50 | Exact match | 11 contacts → |
“We are eager to use our expertise to create a digital world where information is secure and websites are reliable.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Guardian360 B.Vguardian360.eu HQ: Rotterdam, NetherlandsReported employees: 11-50 | Rotterdam, Netherlands | 11-50 | Exact match | 9 contacts → |
“Your IT infrastructure is essential to your operation.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Websafety Ninjawebsafetyninja.com HQ: Reuver, NetherlandsReported employees: 11-50 | Reuver, Netherlands | 11-50 | Exact match | 8 contacts → |
“Keeping your web applications secure is vitally important for business those days.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Passguardpassguard.com HQ: Leusden, NetherlandsReported employees: 1-10 | Leusden, Netherlands | 1-10 | Exact match | 8 contacts → |
“Passguard detects infostealer infections before attackers sell your access on criminal marketplaces.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Attic Securityatticsecurity.com HQ: Zevenbergen, NetherlandsReported employees: 11-50 | Zevenbergen, Netherlands | 11-50 | Exact match | 7 contacts → |
“With Attic, the hacking experts from Zolder provide organizations with high-end cybersecurity operations.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Neriumnerium.nl HQ: Eindhoven, NetherlandsReported employees: 1-10 | Eindhoven, Netherlands | 1-10 | Exact match | 7 contacts → |
“Nerium is a cyber security company specialized in monitoring, detecting, and responding to digital attacks.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Catcher24catcher24.com HQ: Amsterdam, NetherlandsReported employees: 1-10 | Amsterdam, Netherlands | 1-10 | Exact match | 5 contacts → |
“The Catcher24 Scanner identifies vulnerabilities so you will quickly know when you are at risk.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | NEO Securityneosecurity.nl HQ: Amsterdam, NetherlandsReported employees: 11-50 | Amsterdam, Netherlands | 11-50 | Exact match | 5 contacts → |
“Welcome to Neo Security (a Korper ICT company); your partner in cutting-edge cybersecurity and data protection.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Shellbackshellback.nl HQ: Weert, NetherlandsReported employees: 1-10 | Weert, Netherlands | 1-10 | Exact match | 5 contacts → |
“Shellback is an enthusiastic and dedicated team of security specialists based in Weert.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Cyberantcyberant.com HQ: Zeewolde, NetherlandsReported employees: 1-10 | Zeewolde, Netherlands | 1-10 | Exact match | 4 contacts → |
“Stel je voor, ergens in het digitale universum waarin we leven, zijn er sluwe hackers die de boel willen verstoren.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Securityhivesecurityhive.io HQ: Rotterdam, NetherlandsReported employees: 11-50 | Rotterdam, Netherlands | 11-50 | Exact match | 3 contacts → |
“Someone opened a bad spreadsheet"-should never be the reason why your entire customer base can't work.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Mijn Bedrijf Online B.Vmijnbedrijf.online HQ: Oosterhout, NetherlandsReported employees: 1-10 | Oosterhout, Netherlands | 1-10 | Exact match | 3 contacts → |
“Wij van Mijn Bedrijf Online bieden hoogwaardige online diensten.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Cynalytics B.Vcynalytics.nl HQ: Capelle Aan Den Ijssel, NetherlandsReported employees: 1-10 | Capelle Aan Den Ijssel, Netherlands | 1-10 | Exact match | 1 contacts → |
“Good information security starts with a complete overview.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | hackurity.iohackurity.io HQ: Rotterdam, NetherlandsReported employees: 1-10 | Rotterdam, Netherlands | 1-10 | Exact match | 1 contacts → |
“We provide you with a constant, realtime overview of your current security position to withstand the latest threats.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Mailhardenermailhardener.com HQ: The Hague, NetherlandsReported employees: 1-10 | The Hague, Netherlands | 1-10 | Exact match | 1 contacts → |
“The most complete email hardening platform available” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Vabru Administratiekantoor BVvabru.nl HQ: Vianen, NetherlandsReported employees: 1-10 | Vianen, Netherlands | 1-10 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 21 | Yafsecyafsec.com HQ: Dedemsvaart, NetherlandsReported employees: 1-10 | Dedemsvaart, Netherlands | 1-10 | Exact match | 1 contacts → |
“0ver Yafsec Yafsec (zeg maar jaf-sek) is gespecialiseerd in het beveiligen van netwerkstructuren gekoppeld aan het Internet.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Website security monitoring services: dataset insights
September 29, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
48 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 48 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 29, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for website security monitoring services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many website security monitoring services did RevenueBase find based in the Netherlands?
The saved snapshot records 48 matching company records, 217 tracked contacts and 67 verified emails. The public preview displays 21 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 29, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 21 website security monitoring services based in the Netherlands. Snapshot: September 29, 2026. https://revenuebase.ai/companies/website-security-monitoring-services/netherlands.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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