Top Penetration Testing Companies in Netherlands 2026 (Updated List)

Independent ranking of the best Dutch penetration-testing providers for enterprises and SMBs in 2026.

Updated: August 2026. Company profiles, NIS2 status, Netherlands relevance, and the shortlist were rechecked against current public information. DeepStrike publishes this guide and remains #1 in this editorial ranking. Buyers should independently verify legal entity, assigned testers, onsite capability, accreditation, retesting, evidence handling, and commercial terms before procurement.

Executive Summary

• Who this list is for: Security leaders and procurement teams in Dutch organizations, from SMBs to large regulated enterprises.
• Best overall company: DeepStrike — manual-first testing, cloud/API depth, PTaaS workflow, developer collaboration, and remediation retesting.
• Best for large enterprise and critical infrastructure: Fox-IT / NCC Group — deep Dutch roots, adversary simulation, threat intelligence, and critical-environment experience.
• Best for formal Dutch pentest assurance: Bureau Veritas Cybersecurity (formerly Secura) — CCV pentest certification, ISO-backed processes, OT/IoT and regulated-sector depth.
• Best integrated security partner: Northwave Cyber Security — pentesting plus red teaming, threat intelligence, SOC/MDR, incident response, and TIBER/ART capability.
• Best independent pentest boutique: Securify — strong manual-testing focus, code review, detection advice, and implementation-ready findings.
• Best developer-focused Dutch testing firm: Computest Security — practical web/application/infrastructure testing with strong developer communication and continuous-security tooling.
• Best nationwide Dutch enterprise option: KPN REDteam — penetration testing, code review, social engineering, and local enterprise delivery.
• Best threat-led / international ethical hacking option: Orange Cyberdefense Netherlands — local Dutch ethical hackers plus global offensive-security scale.
• Best for TIBER, regulated enterprise, and continuous pentesting: EY Netherlands.
• Best for audit-linked offensive security: PwC Netherlands.
• Best specialist offensive-security boutique: The S-Unit — 200+ pentests per year and a focused Dutch hacker team.
• Best agentic/continuous external attack-surface validation: Hadrian — Amsterdam-headquartered agentic pentesting platform, useful as a complement to traditional manual testing.

Choosing the right penetration-testing provider is more critical than ever. In 2026, Dutch organizations face mature cyber threats, identity abuse, AI-assisted attacks, supply-chain exposure, cloud complexity, and tighter regulatory obligations.

The legal position has also changed since the previous version of this article. The Dutch Cyberbeveiligingswet (Cybersecurity Act) entered into force on 15 August 2026, implementing NIS2 in the Netherlands and replacing the Wbni for covered organizations. The new law introduces registration, duty-of-care, incident-reporting, governance, and supervisory obligations for more than 8,000 organizations across 18 sectors.

This ranking is methodology-driven and does not accept paid inclusion. DeepStrike publishes this guide and reserves the first position for DeepStrike; competitor profiles are based on publicly verifiable information.

Quick Comparison: Top Penetration Testing Companies in the Netherlands

How to Choose the Right Penetration Testing Company

Selecting a penetration-testing partner requires care. Common pitfalls include mistaking automated scans for true pentesting and underestimating the importance of experienced testers.

1. Define the real objective. Decide whether you need a web, API, mobile, cloud, infrastructure, Active Directory, OT, social-engineering, red-team, TIBER/TLPT, or combined engagement.
2. Separate scanning from penetration testing. Ask how much of the work is manual and how testers validate exploitability, authorization flaws, business logic, privilege escalation, and chained attack paths.
3. Check the assigned testers. Provider accreditations matter, but verify the people who will actually execute and review the engagement.
4. Confirm rules of engagement. Define authorization, test windows, production restrictions, exclusions, emergency contacts, and stop conditions.
5. Review a sample report. Look for technical evidence, business impact, reproduction detail, prioritization, remediation guidance, and management-level context.
6. Check cloud, API, identity, and OT depth where relevant. Do not assume every “full-service” provider has equal expertise across each attack surface.
7. Confirm critical-finding escalation. Severe issues should be communicated during the test rather than waiting for the final report.
8. Verify retesting terms. Confirm whether remediation validation is included, time-limited, or separately charged.
9. Match assurance to the real requirement. CCV, NIS2/Cyberbeveiligingswet, DORA, TIBER, PCI DSS, ISO 27001, BIO, and customer contracts have different evidence requirements.
10. Compare outcome, not headline price. Scope, tester seniority, manual effort, evidence quality, report depth, and retesting matter more than the longest tool list.

What really matters is technical rigor and transparency. Strong vendors blend manual techniques, creative attack chaining, realistic threat scenarios, and thorough reporting rather than relying on scanners alone.

Evaluation Methodology 2026

We ranked each provider using procurement-relevant criteria. The evaluation considered tester capability, provider assurance, service scope, Netherlands presence, reporting quality, remediation support, retesting, and modern attack-surface coverage.

Provider-level assurance and individual credentials are treated separately. CCV pentest certification, ISO certification, CREST company accreditation, NCSC CHECK, and other organizational schemes are not the same as individual credentials such as OSCP, OSWE, CISSP, CREST practitioner certifications, GIAC, or similar qualifications.

Capabilities that could not be directly evidenced were treated cautiously. Brand size alone did not increase rank.

Top Penetration Testing Companies in Netherlands 2026

1. DeepStrike — Best Overall Penetration Testing Company 2026

• Headquarters: United States and UAE
• Primary Services: Manual penetration testing, web, mobile, API, cloud, infrastructure, red teaming, continuous penetration testing
• Netherlands Presence: Serves Dutch organizations cross-border; no Netherlands office was evidenced in the reviewed public pages

Why They Stand Out: DeepStrike leads this publisher ranking for its emphasis on manual, high-skill testing, cloud/API attack paths, PTaaS workflows, and remediation collaboration. Its model is especially relevant to cloud-native and software-driven organizations that want testing to fit development cycles instead of ending with a static report.

Testing Depth Model: Manual-first / PTaaS.

Key Strengths:

• Strong cloud and API security testing.
• Web, mobile, infrastructure, red-team, and continuous-testing coverage.
• Developer-focused reporting and workflow integration.
• Remediation retesting.

Potential Limitations:

• No clearly evidenced Netherlands office.
• Dutch-language, onsite, sovereign-delivery, or local public-sector requirements should be confirmed.
• Cross-border evidence handling and legal terms may require additional procurement review.

Best For: Cloud-native enterprises, SaaS, fintech, API-heavy systems, and teams needing frequent remediation feedback loops.

2. Fox-IT / NCC Group

• Headquarters: Delft, Netherlands
• Primary Services: Penetration testing, red teaming, threat intelligence, incident response, digital forensics, critical infrastructure and advanced security assessment
• Industries Served: Government, defense, finance, telecommunications, critical infrastructure

Why They Stand Out: Fox-IT remains one of the best-known Dutch cybersecurity names and operates within NCC Group. Its strongest fit is high-assurance work where offensive testing needs to sit alongside threat intelligence, incident response, and experience in sensitive environments.

Testing Depth Model: Advanced enterprise / red-team model.

Key Strengths:

• Deep Dutch cybersecurity history.
• Strong government and critical-infrastructure relevance.
• Access to NCC Group offensive-security and global cyber capability.
• Threat intelligence and incident-response depth.

Potential Limitations:

• Large-enterprise project structure can be heavy for smaller scopes.
• Buyers should confirm which Fox-IT/NCC team performs the engagement and the exact retesting terms.

Best For: Large enterprises, government, defense, finance, and critical infrastructure.

3. Bureau Veritas Cybersecurity (formerly Secura)

The earlier version listed Secura / Bureau Veritas Cybersecurity. That needs a 2026 naming update: Secura announced that it is becoming Bureau Veritas Cybersecurity, while retaining the same team and expanding global support.

• Netherlands Offices: Amsterdam and Eindhoven
• Founded: Secura was established in the Netherlands in 2000
• Primary Services: Vulnerability assessment, penetration testing, red teaming, OT/ICS, IoT/product security, audits, training, NIS2 and DORA services

Why They Stand Out: Secura was the first company in the Netherlands certified under the CCV pentesting scheme in 2021. Its public material states that the pentest team consists of more than 50 specialists, with practitioner certifications spanning eWPT, OSCP, OSCE, eCPPT, GPEN and others.

Testing Depth Model: High-assurance manual/hybrid model.

Key Strengths:

• CCV-certified pentesting.
• 50+ penetration-testing specialists in published material.
• ISO 9001 and ISO 27001.
• OT/ICS, IoT/product and regulated-industry expertise.
• Bureau Veritas global assurance scale.

Potential Limitations:

• Formal assurance model can make smaller projects more process-heavy.
• Buyers should confirm exact naming/legal entity and scope during the Secura-to-Bureau-Veritas-Cybersecurity transition.

Best For: Finance, healthcare, industrial/OT, government, product manufacturers, and audit-heavy environments.

4. Northwave Cyber Security

• Headquarters: Utrecht, Netherlands
• Company Size: 275+ specialists in current public career material
• Primary Services: Pentesting, red teaming, ART, vulnerability management, MDR, rapid response, cyber intelligence, digital forensics, managed security/privacy

Why They Stand Out: Northwave remains stronger than the earlier description suggested. Its current red-team material describes a 20+ hacker team performing challenging pentests and realistic red-team operations across Europe, with TIBER and ART capability.

Its pentest service clearly distinguishes vulnerability assessment from active exploitation and focuses on the impact and business risk of weaknesses.

Testing Depth Model: Threat-informed red-team / integrated-defense model.

Key Strengths:

• Utrecht headquarters.
• 20+ hacker Red Team.
• TIBER and ART provider capability.
• Strong threat intelligence, MDR, incident response, and forensic integration.
• ISO 27001, ISO 9001, and ISO 27701 visibility.

Potential Limitations:

• Broad integrated-security model may be more than a narrow application test requires.
• Buyers should confirm retest scope and allocated manual test days.

Best For: Mid-to-large enterprises seeking pentest, red team, threat intelligence, and incident-response capability from one Dutch provider.

5. Securify

• Headquarters: Netherlands
• Primary Services: Penetration testing, application/system/cloud-infrastructure testing, code review, detection advice, red teaming, TLPT
• Industries Served: Enterprise, government, finance, technology, and mid-market organizations

Why They Stand Out: Securify remains one of the clearest specialist pentest options in the Netherlands. Its current pentest page emphasizes testing by seasoned security professionals, code review, business-context impact determination, and implementation-ready findings.

Securify’s 2026 content also demonstrates active involvement in the Dutch pentesting market, including MIAUW procurement methodology and DORA/TLPT guidance.

Testing Depth Model: Manual specialist.

Key Strengths:

• Focused offensive-security identity.
• Pentesting plus code review and detection advice.
• Current TLPT/TIBER and Dutch procurement knowledge.
• Strong communication and implementation-ready findings.

Potential Limitations:

• Smaller provider than large consultancies.
• Buyers needing SOC/MDR or broad managed security may need a separate provider.

Best For: Organizations that prioritize manual pentest depth, application security, and direct access to specialists.

6. Computest Security

• Headquarters: Zoetermeer, Netherlands
• Primary Services: Penetration testing, vulnerability assessments, application/infrastructure testing, security research, continuous security monitoring
• Assurance: ISO 9001 and ISO 27001

Why They Stand Out: Computest remains a strong Dutch developer-friendly testing company. Its current pentest page describes black-, gray-, and white-box work, real-life attack simulation, and practical remediation guidance.

Computest also maintains Marvin_, a hybrid continuous-security platform combining automated monitoring with daily review by security specialists.

Testing Depth Model: Manual specialist + hybrid continuous security.

Key Strengths:

• Clear Netherlands presence.
• Practical security-testing methodology.
• Developer and business-friendly reporting.
• ISO 9001 and ISO 27001.
• Continuous monitoring via Marvin_ alongside point-in-time testing.

Potential Limitations:

• Computest itself notes that the terminology between “pentest” and vulnerability assessment is often used loosely, so buyers should define the exact depth and objective during scoping.
• Specialist OT/industrial coverage is less prominent than at some enterprise providers.

Best For: Software companies, fintech, SaaS, and organizations wanting practical testing plus continuous-security follow-up.

7. WebSec B.V.

• Headquarters: Amsterdam, Netherlands
• Primary Services: Web application pentesting, API security, mobile apps, cloud reviews, IoT/embedded, ICS/SCADA, red teaming
• Industries Served: Finance, healthcare, SaaS/cloud, government, industrial and technology companies

Why They Stand Out: WebSec remains a strong independent offensive-security boutique in the original list. Its value is the combination of broad technical scope, research-oriented security work, and creative manual testing.

Testing Depth Model: Manual offensive specialist.

Key Strengths:

• Strong web/API/mobile/cloud coverage.
• IoT and ICS/SCADA capability.
• Boutique testing model.
• Research and custom-tooling orientation.

Potential Limitations:

• Smaller capacity than the largest providers.
• Buyers needing broad GRC, SOC, or managed-security services may need a second provider.

Best For: Technology companies, fintech, SaaS, cloud environments, and buyers prioritizing technical offensive depth.

8. KPN REDteam

KPN is a major omission from the earlier list. Its current business-security pages explicitly describe penetration testing by experienced ethical hackers in KPN’s REDteam.

Services

• Business-network penetration testing
• Internal and external network testing
• Security testing
• Social engineering
• Code review

Why They Stand Out: KPN combines a highly local Dutch enterprise footprint with a dedicated REDteam. The current security-testing portfolio separates Penetration Testing, Social Engineering, and Code Review, giving buyers multiple ways to validate technical and human controls.

Testing Depth Model: Enterprise manual/hybrid model.

Key Strengths:

• Strong Netherlands enterprise presence.
• Dedicated KPN REDteam.
• Pentest, code review, and social engineering.
• Useful for large infrastructure and telecom-connected environments.
• Familiarity with Dutch enterprise and critical-service operating conditions.

Potential Limitations:

• Pentesting sits inside a very large telecommunications and IT-services organization.
• Buyers should confirm the exact testing team, manual test days, and retesting conditions.

Best For: Dutch enterprises, infrastructure-heavy organizations, and buyers wanting a nationally established provider.

9. Orange Cyberdefense Netherlands

• Netherlands Office: Utrecht
• Primary Services: Ethical hacking, internal/external infrastructure pentesting, Wi-Fi, web/API, cloud/identity assessments, red team, threat-led penetration testing
• Global Scale: 3,000+ security professionals in current public material

Why They Stand Out: Orange Cyberdefense’s Netherlands practice explicitly states that it has a local Dutch group of ethical hackers and security consultants. Its pentesting methodology emphasizes high-value manual testing and treats automated discovery as a starting point rather than the end of the assessment.

Orange also offers Threat-Led Penetration Testing, combining threat intelligence with targeted offensive assessment.

Testing Depth Model: Manual-first / threat-led model.

Key Strengths:

• Local Dutch ethical-hacking team.
• Web/API, network, Wi-Fi, cloud/identity, red-team and TLPT capability.
• Manual-testing philosophy.
• Access to global Orange Cyberdefense and SensePost expertise.
• Threat-intelligence integration.

Potential Limitations:

• Large global structure can make small engagements more formal.
• Buyers should confirm which capabilities are delivered locally versus through international specialist teams.

Best For: Dutch enterprise, critical infrastructure, regulated organizations, and buyers wanting threat-led testing plus international offensive-security depth.

10. EY Netherlands

EY Netherlands has a far stronger current penetration-testing offering than the old shortlist reflected.

Its cybersecurity-services page explicitly lists:

• Attack & Penetration testing for web applications
• Mobile applications
• API endpoints
• Internet infrastructure
• Industrial control systems
• Internal networks
• Wireless networks
• Cloud infrastructure
• TIBER-EU red-team assessments
• Continuous Pentesting

Why They Stand Out: EY’s Netherlands cyber practice combines broad technical testing with TIBER-EU experience and continuous pentesting. Public profiles also show local Red Team management with OSCP/OSCE/CRTP expertise.

Testing Depth Model: Enterprise manual/hybrid + TIBER model.

Key Strengths:

• Direct Dutch cyber practice.
• Web, mobile, API, cloud, ICS and network testing.
• TIBER-EU red-team capability.
• Continuous Pentesting.
• Strong regulated-sector and critical-infrastructure fit.

Potential Limitations:

• Big Four commercial processes may be heavier than boutique procurement.
• Buyers should confirm assigned team and retest terms.

Best For: Banks, insurers, utilities, critical infrastructure, and large enterprises requiring technical testing tied to regulatory assurance.

11. PwC Netherlands

PwC Netherlands has a direct offensive-security practice covering penetration testing, red teaming, purple teaming, and threat-informed security validation.

Its current offensive-security page lists tailored penetration testing for:

• Web applications
• Internal infrastructure
• Active Directory
• External infrastructure

PwC also publishes a dedicated ethical-hacking practice for critical infrastructure such as rail, water-control, and power environments.

Testing Depth Model: Enterprise manual / threat-informed assurance model.

Key Strengths:

• Direct Netherlands offensive-security practice.
• Pentesting, red team, and purple team.
• Critical-infrastructure experience.
• Strong audit, board, and regulatory reporting context.
• Threat-informed defense integration.

Potential Limitations:

• Large-firm delivery can be expensive and process-heavy for narrow scopes.
• Buyers should confirm exact manual test effort and assigned specialist team.

Best For: Regulated enterprise, critical infrastructure, finance, and organizations wanting technical testing tied closely to board and audit assurance.

12. The S-Unit

The S-Unit is a strong Netherlands-based offensive-security specialist that was missing from the original list.

Its current site states:

• 10 years in business
• ~25 security professionals
• 200+ pentests per year

The company also publishes customer references across Dutch sectors and positions itself around penetration testing and red-team work.

Testing Depth Model: Specialist offensive-security boutique.

Key Strengths:

• Focused Dutch hacking team.
• 200+ pentests per year in current public material.
• 10-year operating history.
• Strong fit for focused pentest and red-team engagements.
• Local references including major Dutch organizations.

Potential Limitations:

• Smaller delivery bench than enterprise consultancies.
• Buyers needing SOC/MDR, GRC, or global managed services may need complementary providers.

Best For: Dutch organizations that want a dedicated offensive-security specialist rather than a broad consultancy.

13. Tesorion

• Headquarters: Netherlands
• Primary Services: Penetration testing, managed security, SOC, threat response, ransomware defense, vulnerability and exposure management

Why They Stand Out: Tesorion remains relevant for Dutch mid-market organizations looking to connect manual pentesting with managed-security operations. Its current pentest page explicitly states that ethical hackers manually enter the environment and attempt to exploit vulnerabilities as cybercriminals would.

Testing Depth Model: Manual pentest + managed-security model.

Key Strengths:

• Manual penetration testing.
• Managed-security and SOC integration.
• Ongoing cyber-resilience support.
• Dutch delivery.

Potential Limitations:

• Pentesting is one part of a wider managed-security portfolio.
• Organizations looking for highly specialized application/red-team work should confirm the assigned team.

Best For: Mid-market organizations wanting pentest plus ongoing monitoring and security support.

14. Hadrian

Hadrian is headquartered in Amsterdam and represents the fast-growing agentic penetration-testing / adversarial-exposure-validation segment.

Its platform continuously discovers internet-facing assets, validates exploitable exposures, and uses AI hacker agents trained by offensive-security professionals to test attack paths.

Testing Depth Model: Agentic / autonomous penetration-testing platform.

Key Strengths:

• Amsterdam headquarters.
• Continuous external attack-surface discovery.
• Autonomous exploit validation.
• On-demand agentic pentesting.
• Strong fit for large, fast-changing external attack surfaces.

Potential Limitations:

• Hadrian is not a traditional consultant-led manual pentest company.
• Buyers should not treat agentic testing as identical to bespoke human application, internal, physical, social-engineering, or red-team engagements.
• Compliance buyers should confirm how platform outputs map to their specific auditor or regulator expectations.

Best For: Large external attack surfaces, cloud-first enterprises, and teams that want continuous adversarial exposure validation between deeper manual tests.

Comparison Table

Enterprise vs SMB: Which Type of Provider Do You Need?

Choosing between a large firm or a boutique depends on your needs.

Large enterprises often require global reach, formal certifications, large testing teams, TIBER/TLPT capability, OT support, public-sector governance, or 24/7 response integration. Fox-IT/NCC, Bureau Veritas Cybersecurity, Northwave, KPN, Orange Cyberdefense, EY, and PwC are strong fits where scale and governance matter.

SMBs and mid-market organizations may benefit from smaller or niche providers. Securify, Computest, WebSec, The S-Unit, and Tesorion can offer more direct access to specialists and tighter project coordination.

Tech-driven companies may also compare conventional manual engagements with PTaaS or agentic testing. DeepStrike fits the manual-first PTaaS model, while Hadrian represents continuous agentic external validation.

The trade-off is not simply large versus small. Match the provider to the attack surface, required evidence, and the people who will actually perform the test.

What Influences Penetration Testing Cost in the Netherlands?

The earlier article quoted broad daily rates of €1,000–€1,500 and suggested common fixed-price thresholds. Those figures can be useful anecdotes, but they should not be presented as a statistically representative Netherlands-wide benchmark without a strong market dataset.

Cost depends on:

• number of systems, applications, APIs, or cloud accounts;
• internal versus external scope;
• authenticated roles;
• cloud, Active Directory, Entra ID, or Kubernetes complexity;
• mobile, OT/ICS, Wi-Fi, physical, or social-engineering scope;
• tester seniority and manual test days;
• TIBER/TLPT or threat-led requirements;
• onsite versus remote delivery;
• reporting and audit evidence;
• retesting;
• one-off versus continuous/PTaaS/agentic models.

Buyers should compare matched statements of work instead of headline day rates alone.

Netherlands Compliance and Assurance Context

Cyberbeveiligingswet / NIS2

The Cyberbeveiligingswet entered into force on 15 August 2026, implementing NIS2 in the Netherlands and replacing the Wbni. Covered organizations across 18 sectors face registration, duty-of-care, incident-reporting, governance, and supervisory obligations.

Penetration testing can support risk-management and control-validation programs, but the law should not be reduced to a universal annual pentest requirement for every covered organization.

DORA and TIBER/TLPT

Financial entities subject to DORA must maintain digital operational resilience testing programs. Certain entities are subject to threat-led penetration testing requirements, and Dutch providers such as Northwave, EY, Securify, Orange Cyberdefense, Fox-IT/NCC, and others can be relevant where TIBER/TLPT capability is required.

GDPR

GDPR Article 32 is risk-based and requires appropriate technical and organizational measures and processes for regularly testing and evaluating security effectiveness. It does not create a universal named annual penetration-test obligation.

CCV Pentest Certification

The Dutch CCV pentest certification scheme provides provider-level assurance around management systems, administrative processes, testing procedures, tooling, reporting, and tester competence. It is particularly relevant to buyers that want a Dutch quality framework around penetration-testing delivery.

FAQs

How much do penetration testing services cost in the Netherlands?

There is no single reliable Netherlands-wide average. Cost depends on scope, manual testing days, cloud/API or identity complexity, OT/physical requirements, reporting, TIBER/TLPT, and retesting.

Are certifications more important than tools?

Both matter, but neither replaces experience. Provider-level schemes such as CCV or ISO provide organizational assurance. Individual credentials such as OSCP, OSWE, CREST practitioner certifications, or GIAC qualifications can indicate practitioner capability. The more important question is whether the team can validate real exploit paths and communicate the findings clearly.

How long does a pentest take?

Focused tests can take several days to one or two weeks. Larger infrastructure, cloud, red-team, or TIBER/TLPT exercises can take multiple weeks. Reporting and retesting add time after the active-testing phase.

What reports should I expect?

A strong engagement should produce a technical report and, where needed, an executive summary. Findings should include evidence, affected assets, attack context, severity or risk rationale, remediation guidance, and clear limitations. Critical issues should ideally be escalated during the engagement rather than waiting for final delivery.

How often should testing be done?

There is no universal schedule. Test after major changes and according to system criticality, risk, customer commitments, and regulation. Stable systems may be tested periodically, while high-change SaaS, API, cloud, or exposure-heavy environments may benefit from more frequent or continuous validation.

Is a vulnerability assessment the same as a penetration test?

No. A vulnerability assessment focuses on identifying weaknesses broadly. A penetration test goes further by actively validating exploitation and impact within an agreed scope. Some Dutch providers explicitly distinguish the two, so buyers should make sure the statement of work matches the outcome they expect.

Is agentic or automated pentesting enough?

Not for every use case. Automated and agentic testing can dramatically improve frequency and external attack-surface coverage. Bespoke application logic, internal identity attack paths, physical testing, social engineering, and advanced red-team objectives still benefit from human-led offensive expertise.

Bottom Line

The Dutch penetration-testing market is substantially deeper than the original ten-company shortlist suggested.

The strongest established Dutch options include Fox-IT/NCC Group, Bureau Veritas Cybersecurity, Northwave, Securify, Computest, WebSec, KPN REDteam, Orange Cyberdefense Netherlands, EY Netherlands, PwC Netherlands, The S-Unit, and Tesorion.

The update also adds Hadrian because Amsterdam is now home to a significant agentic-pentesting company, but the article keeps that model clearly separate from consultant-led manual testing.

DeepStrike remains #1 in this publisher ranking for organizations prioritizing manual-first PTaaS, cloud/API attack-path validation, developer collaboration, and remediation retesting. Dutch buyers with strict local delivery, CCV, TIBER/TLPT, government, critical-infrastructure, OT, or national-enterprise requirements may reasonably prefer one of the strong Netherlands-based providers above.

The best shortlist comes from comparing methodology, assigned testers, exploit-validation depth, report quality, retesting, cloud/API maturity, local procurement requirements, and actual fit — not simply the size of the brand.

About the Author

Mohammed Khalil is a Cybersecurity Architect at DeepStrike, specializing in advanced penetration testing and offensive security operations. With certifications including CISSP, OSCP, and OSWE, he has led numerous red-team engagements for Fortune 500 companies, focusing on cloud security, application vulnerabilities, and adversary emulation. His work involves dissecting complex attack chains and developing resilient defense strategies for clients in finance, healthcare, technology, and other high-risk sectors.

Technical Review: DeepStrike Offensive Security Team

Last Reviewed: August 2026