Top Penetration Testing Companies in Greece 2025

Top 10 Penetration Testing Companies in Greece

• Attack reality: 2024–2025 saw a sharper, more public wave of ransomware and service-disruption events in Greece, including hospital outages and state/enterprise incidents.
• Regulatory pressure: Greece’s National Cybersecurity Authority (NCSA) enforces NIS2 (Law 5160/2024) with mandatory notification and resilience requirements.
• Enforcement bite: The Hellenic Data Protection Authority issued multi-million euro GDPR fines (e.g., ELTA/Hellenic Post €2.99M, 2024).
• What works: Manual-first penetration testing (ethical hacking) chained with continuous security testing (PTaaS) mapped to OWASP, NIST SP 800-115, PCI DSS 11.3.
• Key players: DeepStrike, CENSUS, TwelveSec, Obrela, ADACOM, Odyssey, Secmentis, and others.
• Certifications matter: CREST, OSCP, GIAC and similar credentials differentiate serious penetration testing companies.
• Why it matters: In Greece, cyber security companies are now critical partners for business resilience.

Why Penetration Testing Matters in Greece Now

Penetration Testing Companies in Greece

Greek organizations from hospitals to ministries to payment and logistics have experienced real operational impact:

• Hospital IT systems forced into manual workflows
• Ministries and service providers facing ransomware-induced downtime
• GDPR penalties for weak controls

This is not theoretical, it’s downtime, disclosure obligations, lost trust, and high costs of ransomware incidents in Greece 2025.

Penetration testing vs Automated Scans

Unlike automated tools, a web application pentest or mobile application pentest chains flaws like authentication bypass, SSRF, or misconfigurations into real-world attack paths that demonstrate actual business impact. Professional testers follow recognized methodologies such as the Penetration Testing Execution Standard (PTES), OWASP Testing Guide, and NIST SP 800-115, ensuring that engagements go beyond surface-level vulnerability checks.

• Practical differences: Automated scanners provide broad coverage and quickly flag common misconfigurations, but they often miss complex exploit chains or business logic flaws. Manual penetration testing adds threat modeling, privilege escalation attempts, lateral movement scenarios, and tailored exploitation to show how multiple issues can be combined into a credible breach.
• Testing depth: Different approaches (black-box, grey-box, white-box) offer varying visibility. Authenticated testing often uncovers flaws invisible to unauthenticated scans, such as weak session handling or authorization bypasses.
• Modern scope: Professional pentests extend beyond traditional web or network layers, covering APIs/GraphQL endpoints, SaaS integrations, cloud/IaC configurations, and advanced attack surfaces like supply chain dependencies.
• Actionable outputs: Unlike raw scanner results, penetration test reports include CVSS scoring, exploit narratives, replayable proof-of-concepts, and prioritized remediation guidance. Many providers also include a retest window to verify fixes.
• Continuous validation: With the adoption of Continuous Pentesting / PTaaS models, organizations gain ongoing vulnerability discovery, SLA-backed remediation tracking, and integrations with CI/CD pipelines and collaboration tools (e.g., Jira, Slack) to close the gap between discovery and fix.

Regulatory drivers:

• PCI DSS 11.3 requires regular PCI pentests after any significant change. This typically covers external and internal testing, segmentation validation of the cardholder data environment (CDE), and documented remediation with evidence of retesting.
• NIS2 Directive expands oversight for Greek “important” and “critical” entities, requiring documented risk management, incident reporting, and supply chain assurance. Penetration test reports serve as proof of compliance readiness under the National Cybersecurity Authority.
• ISO 27001 audits expect objective evidence of technical assurance. Pentest results directly support Annex A controls on vulnerability management and secure development, feeding into the Statement of Applicability (SoA) and risk treatment plans.

Greece’s Leading Penetration Testing Companies

Below are the top 10 penetration testing companies in Greece, structured consistently with the New Zealand reference.

DeepStrike Continuous, Manual-First Pentesting (PTaaS + Red Team)

deepstrike's role in market

Services: Offers a broad penetration testing portfolio including:

• Web applications, APIs & GraphQL
• Site pentest engagements
• Cloud / IaC security reviews
• Mobile application penetration testing services (Android & iOS)
• External and internal network testing
• Red-team operations & phishing simulations
• CI/CD retests with Jira & Slack integrations

Certifications & Compliance:

• OWASP Top 10, CWE, NIST SP 800-115
• PCI DSS reporting packs

Clients: Mid-market and enterprise in Greece & EU

Pricing:

• Project-based engagements
• Subscription PTaaS via Continuous Pentesting
• See our pentest pricing

Key Strength:

• Manual-first exploitation with continuous dashboards, SLAs, and remediation support
• Strong in application security frameworks & cloud security testing

Verdict: DeepStrike is the no.1 penetration testing company in Greece for organizations adopting modern, DevOps-aligned continuous pentesting.

CENSUS S.A. CREST-Accredited & Code Security

Services:

• Infrastructure pentesting
• Web & mobile app pentests
• APK pentest
• Source code audits
• Product & device security testing

Certifications & Compliance:

• CREST, OSCP, GIAC-accredited team

Clients: Finance, maritime, software, telecom, healthcare

Pricing: Bespoke, premium for deep code audits

Key Strength: Research-driven, strong in manual code review for root-cause fixes

Verdict: A top choice in Greece for code-heavy environments needing in-depth audits.

TwelveSec Application-Centric Assurance

Services:

• Web app pentesting
• Mobile app pentesting (Android & iOS)
• Continuous Security Testing
• Infrastructure pentesting
• Advisory & training add-ons
• Continuous Security Testing

Certifications & Compliance:

• OWASP & NIST alignment
• Experienced senior practitioners

Clients: Global 2000, IGOs, Greek public sector

Pricing: Project-based, training packages optional

Key Strength: Strong in pentester web and application-focused engagements

Verdict: Ideal for organizations needing application-centric assurance with consultant-led delivery.

Obrela Security Industries Pentesting + 24×7 MDR

Services:

• Web, app, API, and network pentests
• Integrated MDR & threat intelligence pipelines

Certifications: Enterprise-grade, banking-standard reporting

Clients: Large enterprises & critical sectors across EMEA

Pricing: Project or program-level

Key Strength: Direct integration of pentest outputs into continuous monitoring (MDR)

Verdict: Best sited for enterprise environments where red and blue teams must align.

ADACOM Compliance-Aware Pentesting

Services:

• Web & infrastructure pentesting
• Cloud/network reviews
• Governance audits
• Cybersecurity as a service
• NIS2 readiness programs

Certifications: NIS2, GDPR, ISO frameworks

Clients: Enterprises & public sector

Pricing: Programmatic

Key Strength: Blends technical testing with compliance readiness

Verdict: Strong for regulated organizations needing compliance-first pentesting.

Odyssey Cybersecurity Pentest + CTEM Programs

Services:

• Penetration testing (infra, app, cloud)
• Vulnerability scanning
• Continuous Threat Exposure Management (CTEM)

Clients: Finance, critical infrastructure, large enterprise

Pricing: Project & subscription programs

Key Strength: Converts pentest findings into prioritized resilience improvements

Verdict: Good fit for organizations adopting continuous exposure management.

Secmentis Greece-Wide Pentesting (incl. Physical)

Services:

• External & internal network pentests
• Web & mobile pentests
• Wi-Fi security
• Physical penetration testing

Clients: SMEs to mid-market, multi-city operations

Pricing: Engagement-based

Key Strength: On-site coverage across Greece with pragmatic delivery

Verdict: Best for businesses needing local, flexible pentest coverage.

How to Choose a Pentest Partner in Greece

When preparing a penetration testing proposal or penetration testing RFP, organizations should evaluate providers across several key dimensions. The goal is not just to select a vendor that can “run tests,” but to engage a partner who understands Greek regulations, sector-specific risks, and modern attack surfaces.

• Expertise: Look for proven case studies within Greece and the EU, especially in regulated sectors like finance, healthcare, and critical infrastructure. Certifications such as OSCP, OSWE, CREST, or GIAC signal practitioner-level competence. Beyond credentials, assess whether the team includes senior consultants rather than only junior testers—depth of experience often determines whether advanced attack chains are uncovered.
• Scope: Ensure the provider can cover the full spectrum of your environment. This includes:
  • APIs and GraphQL endpoints (common in fintech, e-commerce, and logistics platforms).
  • Wireless/Wi-Fi testing for both guest and corporate networks.
  • Mobile pentesting checklists for Android and iOS (covering storage, API integration, reverse engineering).
  • Cloud and IaC environments (AWS, Azure, GCP, Kubernetes). A strong partner should map testing scope to your actual attack surface, not just a generic checklist.
• Methodology: Reputable penetration testing companies should demonstrate alignment with recognized frameworks such as OWASP, NIST SP 800-115, PTES, and OSSTMM. Ask whether they perform black-box, grey-box, or white-box testing depending on your needs, and whether threat modeling is included to prioritize realistic attack paths.
• Reporting: Insist on comprehensive reports that go beyond scanner output. Reports should include:
  • CVSS scoring for objective risk prioritization.
  • Exploit narratives describing how flaws could realistically be chained to impact business operations.
  • Proof-of-concept evidence (screenshots, payloads, exploit steps).
  • Remediation guidance tailored to your environment (not just generic CVE notes).
  • Retesting window to confirm fixes. This is critical for compliance and operational assurance.
• Compliance Fit: In Greece, a strong pentest partner must understand and support:
  • PCI DSS 11.3 requirements for cardholder environments.
  • NIS2 Directive obligations for “important” and “critical” entities under the National Cybersecurity Authority.
  • ISO 27001 audits, where penetration test results provide hard evidence of technical controls in action. This ensures pentests are not just technical exercises, but directly feed into your audit and regulatory obligations.
• Pricing: Understand how pentest pricing is structured—per IP, per application, or fixed-scope projects. Compare against benchmarks like how much does a vulnerability assessment cost in Greece, while remembering that a true penetration test is far more valuable than a simple vulnerability scan. Request transparency on daily rates vs. fixed-price packages, and clarify whether retesting is included in the quote.

Key Penetration Testing Services

Top cyber security companies in Greece typically cover:

• Web application pentest (SQLi, XSS, IDOR, SSRF)
• Mobile pentesting (with mobile pentesting checklist, Android/iOS tools)
• Network security (internal, external, Active Directory, VPN)
• Cloud cyber security (AWS/Azure/GCP reviews, IaC security)
• Red teaming & social engineering
• Source code reviews
• Specialty tests: IoT, device pentesting, DDoS simulation

Step-by-Step Penetration Testing Process

• Define scope & compliance needs
• Select provider (check pentest award 2025 winners)
• Kickoff with rules of engagement
• Conduct testing (scanning + exploitation)
• Reporting & remediation
• Retesting of criticals
• Continuous improvement via continuous security testing

Common Mistakes Greek Organizations Should Avoid

• Thinking a scan pentest
• Skipping internal pentests, Wi-Fi & phishing/social tests
• Treating pentests as one-off instead of recurring
• Overlooking certifications (choose the best cyber security companies)
• Ignoring business context of findings

Cybersecurity for Greek Businesses

With cyber threats escalating, network security companies and penetration testing providers are no longer optional but essential partners for resilience. Choosing a partner with depth in manual pentesting, continuous validation, and compliance-ready reporting can be the difference between an avoided breach and costly downtime.

DeepStrike is trusted by customers across industries in Greece and Europe, offering a portfolio of services tailored to modern business needs:

Penetration Testing Services

Our core penetration testing services cover the full attack surface:

• Infrastructure testing: Internal & external network pentests, AD/Azure AD, VPN/RDP exposure.
• Application testing: Web apps, APIs, GraphQL, and enterprise software.
• Specialty targets: IoT devices, cloud environments, wireless, and physical security.

Every engagement follows international pentest frameworks (OWASP, PTES, NIST SP 800-115), and delivers actionable reports with CVSS ratings, exploit narratives, and prioritized remediation.

Continuous Pentesting (PTaaS)

Security is not a one-off event. Our Continuous Pentesting (CPT) model blends:

• Automated vulnerability discovery
• Manual exploitation by senior pentesters
• Always-on dashboards with SLAs & Jira/Slack integration

This continuous security testing approach means flaws are caught in weeks not months shrinking the window attackers have to exploit them.

Web Application Pentesting

Our web application pentests simulate real-world attacker scenarios against:

• Custom web apps, portals, and SaaS platforms
• Authentication flows (SSO, OAuth, JWT, session handling)
• Injection flaws (SQLi, XSS, CSRF, IDOR, SSRF)
• Business logic flaws unique to your platform

We also include secure coding guidance and retesting to ensure fixes hold. For developers, this doubles as a pentest framework to improve the SDLC.

Mobile Application Pentesting

Our mobile application pentesting services focus on both iOS and Android:

• Static & dynamic analysis of APK/IPA files
• Secure storage & authentication testing
• API/backend assessments
• Alignment with mobile pentesting checklists (iOS & Android)

We use proven mobile app pentesting tools alongside manual exploitation to uncover real-world risks, ensuring mobile-first organizations stay secure.

About the Author

Mohammed Khalil, Cybersecurity Architect at DeepStrike

• Certifications: CISSP, OSCP, OSWE
• Experience: Fortune 500 red teaming, cloud security, adversary emulation

Learn more About Us or explore career opportunities at Careers.

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FAQs Penetration Testing in Greece

• What does a pentest company do? Simulates real-world attacks across apps, APIs, networks, mobile, and people.

• Why use a Greek provider? Local firms know NIS2, GDPR, and provide on-site timezone-aligned support.

• How much does penetration testing cost in Greece?
• Small web pentest: ~€5–10K
• Multi-app or infra: €20–50KCheck pentest pricing for details.

• Internal vs external pentest?

External internet-facing perimeterInternal assumes attacker foothold (VPN, rogue insider)

• How often should we test? At least annually, after major changes, or quarterly via PTaaS

• How do we prepare?

Define scope, assets, compliance needs, and review penetration testing RFP best practices.