October 1, 2025
Updated: September 7, 2026
A 2026 buyer guide to penetration testing companies in Greece: evidenced providers, NIS2 and DORA testing requirements, scopes, costs, and retesting.
Mohammed Khalil
Choosing penetration testing companies in Greece starts with the systems and business risks you need tested. CENSUS, TwelveSec, ADACOM, and DeepStrike offer different starting points for a shortlist, but a provider name alone does not establish technical fit, local delivery, or regulatory suitability. Greek buyers should compare the proposed scope, responsible testers, evidence quality, data handling, and remediation support. This guide explains the relevant Greek and EU testing requirements, separates project testing from ongoing services, and gives security and procurement teams a practical way to request comparable proposals and judge the results.
Start with providers whose published services match your environment, then verify the team and contract behind the proposal. An application assessment, a network penetration test, and a financial-sector threat-led exercise solve different problems.
This shortlist uses service pages and accreditation information checked on September 6, 2026. DeepStrike publishes this guide and is included as an international provider option. The comparison is based on public evidence, not a commissioned test of each firm's delivery quality, an exhaustive market survey, or an independent ranking.
| Provider | Published evidence relevant to a shortlist | What to establish in the proposal |
|---|---|---|
| DeepStrike | Manual assessment, reporting, dashboard collaboration, retesting, and project or ongoing service options | Availability for the Greek engagement, remote/on-site arrangements, cadence and contractual inclusions |
| CENSUS S.A. | CREST directory lists Greece and penetration-testing accreditation, with application and infrastructure testing focus | Exact contracting entity, assigned expertise, scope and accreditation relevance |
| TwelveSec | Application, system, API, cloud, and other technical assurance services | Named testers, required specialist coverage, delivery location and reporting language |
| ADACOM | Cyber Security Assurance includes penetration testing and vulnerability assessment; official contact page lists Athens HQ | Dedicated testing effort, boundaries of any managed-services bundle, and remediation validation |
DeepStrike's published services describe manual assessment, validated findings, remediation recommendations, a results dashboard, collaboration, and retesting. It is an option to evaluate for application, cloud, infrastructure, and ongoing testing needs. Its published locations are in the United States and UAE; buyers should confirm Greek delivery arrangements directly. DeepStrike's penetration testing services.
Compare the agreed scope and effort with the other proposals. For ongoing work, ask which changes trigger testing, how findings reach the engineering team, and which retesting terms apply to the selected plan. A subscription label alone does not establish complete coverage.
CENSUS is a relevant candidate when independently checkable company accreditation matters to procurement. Its current CREST marketplace entry identifies Greece and lists penetration testing as its accreditation category, with web/API, mobile, and infrastructure among the stated technical areas. That entry supports a penetration-testing accreditation claim; it should not be extended to every other service category. CENSUS's CREST listing.
Ask whether the proposed consultants have experience with the technology that carries your highest risk. An accreditation badge is useful evidence, but the assigned team's skills, available time, and scope still determine what an engagement can examine.
TwelveSec publishes application and system penetration testing, API testing, cloud security assessment, source-code review, and other assurance services. Its service descriptions make it a candidate for buyers who need to discuss several related technical scopes with one consultancy. The final statement of work should identify which of those services are actually included. TwelveSec's services.
For a web and API engagement, ask how it will test different user roles and business workflows. For cloud or infrastructure work, request a clear explanation of the starting access, assessment boundaries, and evidence you will receive.
ADACOM's Cyber Security Assurance offering includes penetration testing and vulnerability assessment, including infrastructure and network testing. It may be useful to evaluate when a testing engagement must coordinate with a broader security program. Keep the penetration-test deliverables and testing effort explicit within that broader proposal. ADACOM's assurance services.
ADACOM lists an Athens headquarters on its official contact page. Buyers should still confirm where the assigned testers will work and whether travel, on-site access, and Greek-language reporting are included. ADACOM's contact details.
The obligation depends on the entity, applicable framework, and systems in scope. Establish those first; a generic claim that a provider is “NIS2 compliant” does not explain what your organization must test.
Greece implemented NIS2 through Law 5160/2024. Joint Ministerial Decision (JMD) 1689/2025, Article 18, specifies external penetration tests at least annually for covered essential and important entities. Essential entities additionally carry out internal tests at least annually. The provisions also address testing following serious cybersecurity incidents and validation of corrective measures. Confirm your classification and applicable sector rules before defining the engagement. Greek national cybersecurity requirements, Article 18.
The National Cybersecurity Authority's legislative index is the starting point for checking the national framework and subsequent instruments. A penetration test supplies evidence for part of an organization's security program; it does not discharge all governance, incident-management, or other obligations. Greek cybersecurity legislation.
The Digital Operational Resilience Act, Regulation (EU) 2022/2554, has applied since January 17, 2025. Its Articles 24–25 address a risk-based testing program; Article 26 establishes advanced threat-led penetration testing, or TLPT, for designated entities, normally at least every three years subject to supervisory adjustment. A routine application pentest and a regulator-governed TLPT are different procurements. Financial-sector buyers should establish which regime and testing obligations apply before commissioning work. DORA's testing provisions.
Under the defined approach in PCI DSS v4.0.1, Requirements 11.4.2 and 11.4.3 call for applicable internal and external penetration testing every 12 months and following significant infrastructure or application changes. Requirement 11.4.4 addresses correction and repeat testing. Establish the relevant cardholder-data scope and assessment requirements; a vulnerability scan is not interchangeable with a penetration test. PCI DSS v4.0.1, Requirement 11.4.
GDPR Article 32 requires security appropriate to the processing risk and a process for regularly evaluating the effectiveness of security measures. Penetration testing can support that work, but Article 32 does not prescribe one annual pentest for every business. GDPR Article 32.
ISO/IEC 27001:2022 concerns an information security management system and risk treatment. When buying testing for an ISO program, ask how the scope and findings support the organization's risk assessment, selected controls, and remediation decisions. A penetration-test report is not itself ISO certification. ISO/IEC 27001:2022.
| Buying context | Scoping question | Evidence to request |
|---|---|---|
| Greek essential or important entity | Which national classification and testing scope apply? | Scope linked to classification, findings and corrective-action validation |
| Covered financial entity | Baseline resilience testing or designated-entity TLPT? | Appropriate methodology, governance and scope acceptance |
| Payment-card environment | Which systems and segmentation boundaries are in scope? | Methodology, applicable test results and verification of corrections |
| Personal-data or ISO assurance | Which risks and controls need evaluation? | Findings tied to processing risk, control objectives and treatment decisions |
Choose the test by the risk question it must answer. Counting domains or IP addresses alone does not describe the complexity of user roles, business processes, trust boundaries, or connected services.
| Risk question | Relevant scope | What useful evidence shows |
|---|---|---|
| Can one customer access another customer's records? | Authenticated web and API testing across roles and tenants | Whether the server enforces the intended access boundary |
| Can a mobile app expose sensitive information? | Mobile application and backend assessment | Client storage, authentication, communication and backend-control findings |
| Can a compromised identity reach sensitive cloud resources? | Cloud identity, configuration and attack-path assessment | The permissions and control failures behind an agreed, safely validated path |
| Can an outsider enter, or an internal foothold spread? | External and internal infrastructure testing | Entry conditions, segmentation and privilege-boundary weaknesses |
| Can defenders recognize and contain a realistic attack scenario? | An explicitly scoped red-team exercise | Detection and response observations against agreed objectives |
For web applications, include important workflows and application programming interfaces, not just the public login page. The right web application assessment scope should identify the roles, integrations, and business rules that need testing.
For mobile software, include both the app and its backend assumptions. A mobile application penetration test should make clear which platforms, builds, accounts, and server components are included.
OWASP's Mobile Application Security Verification Standard provides a useful reference for discussing mobile security controls. Ask the provider which applicable controls and test cases it will examine, rather than treating a logo as proof of coverage. OWASP MASVS.
Cloud work needs an explicit distinction between reviewing configuration and validating an attack path. A cloud penetration testing scope should define permitted accounts, identities, services, and operational constraints.
Red teaming is useful when the objective includes detection and response, but it does not automatically replace a detailed assessment of every application. Social engineering, physical access, and production-impacting activity require their own explicit authorization and safeguards.
External tests begin outside the organization's network boundary and examine agreed internet-facing systems. Internal tests begin from an agreed internal foothold, such as a low-privilege account or network connection, and assess what that access could enable.
That starting position is separate from black-box, gray-box, or white-box testing. An external application test can include credentials and documentation; an internal assessment does not have to begin with administrator access. Define both the starting point and the information provided to testers in the statement of work.
For networks spanning offices, cloud services, and remote workers, identify the actual trust boundaries instead of assuming that every asset inside an office is trusted. This internal versus external testing comparison explains how the scopes complement one another.
Automated tools help discover assets, identify known weaknesses, and repeat checks at scale. Manual analysis adds context: whether a finding is exploitable under the agreed conditions, how application-specific rules behave, and whether several weaknesses form a meaningful attack path.
Ask the provider to separate scanner observations from confirmed findings and to record limitations. Neither a large vulnerability count nor the phrase “fully manual” establishes quality on its own. Our manual versus automated testing guide explains where each approach contributes.
A useful assessment validates impact with the minimum evidence needed. For example, a tester can use two authorized test accounts and synthetic records to demonstrate an access-control failure without collecting unrelated customer data. The report should distinguish what was demonstrated from a wider consequence that remains inferred.
A traditional engagement is usually a defined assessment with an agreed scope, testing window, report, and remediation follow-up. Penetration Testing as a Service, or PTaaS, adds an ongoing delivery and collaboration model, but providers differ in how much testing is actually included.
Compare testing effort, coverage, change triggers, reporting, and retesting rather than the subscription name. The PTaaS versus traditional pentesting comparison is useful when deciding between a scheduled project and continuing support.
For a team releasing frequently, agree which changes warrant targeted testing and when the broader baseline scope will be reassessed. A continuous testing program should make those decisions visible; it should not imply that every deployment is instantly or completely tested.
Record how security findings enter the engineering workflow and who owns follow-up. Ask about the retest window, number of permitted cycles, exclusions, and treatment of newly introduced vulnerabilities.
There is no fixed price list that can reliably represent every Greek engagement. The cost depends on the scope and the work needed to assess it. A small external network review and a multi-role application, API, mobile, and internal-network engagement are not comparable purchases.
For Athens, Thessaloniki, Crete, or a distributed organization, request the same scope from each provider. Include:
Ask suppliers to identify exclusions and additional charges. Comparing an initial headline price can be misleading if one proposal omits authenticated testing, reporting time, or remediation validation.
DeepStrike's published testing plans distinguish one-shot and continuous engagements. Use the current scoped proposal to establish the commercial terms; a generic international price range is not a verified Greek market benchmark.
Use a Scope–Evidence–Closure review before signing and again when accepting the report. This is a practical procurement framework: it checks whether the work promised, the risk demonstrated, and the remediation status can be traced to one another.
| Stage | Buyer check | Acceptance evidence |
|---|---|---|
| Scope | Does the proposal test the important assets, roles and trust boundaries within agreed safeguards? | Written scope, access assumptions, exclusions, authorization, testing window and escalation contacts |
| Evidence | Can engineering understand and reproduce the confirmed finding safely? | Affected asset, prerequisites, sanitized reproduction, demonstrated impact, severity rationale and limitations |
| Closure | Has the relevant fix been checked, or is remaining risk explicitly recorded? | Retest result, tested version/environment, date, remaining findings and responsible owner |
NIST SP 800-115 remains a useful planning reference for technical security assessments, including interpreting findings and developing mitigation strategies. It is guidance for building an assessment process, not proof that a vendor has covered every risk. NIST's testing and assessment guide.
For an access-control finding, a strong report identifies the two permitted test roles, the synthetic record, the expected restriction, and the observed server behavior. Closure means checking the corrected authorization decision and recording the result in the tested environment. Re-running a generic scanner would not by itself establish that the business rule is fixed.
Request a redacted sample report before purchase. Look for concrete evidence and remediation guidance, then ask how urgent findings are communicated during the engagement. Avoid using a “clean” report as the sole measure of success: limitations, untested areas, and unresolved risk must remain visible.
Many application and internet-facing assessments can be delivered through agreed remote access. Internal, wireless, physical, or restricted-environment work may need a local presence or a securely arranged testing foothold. Confirm delivery location, access, travel, time zone, and reporting language in the proposal; a country landing page does not prove an office exists there.
Company accreditation and personal qualifications answer different questions. Check the exact company and relevant accreditation category, then ask who will perform your test and what experience they have with your technology. Match any mandatory credential requirement to the contract or applicable assurance scheme; do not substitute a badge for a review of scope and report quality.
Prepare an asset inventory, architecture summary, important business workflows, user roles, and relevant API documentation. Agree written authorization, exclusions, third-party permissions, stop conditions, and emergency contacts. Provide credentials through an approved secure channel and use synthetic data where practical.
Arrange sharing rights and permitted recipients in advance. A full technical report can reveal exploitable details, so consider whether a redacted report or completion letter serves the customer's assurance need. Keep the tested scope, dates, limitations, and unresolved issues clear in any shared version.
Do not assume it does. Ask which responsibilities remain with your organization, including application logic, customer-managed identities, configuration, and integrations. Your engagement should identify the permitted customer-controlled assets and relevant third-party testing conditions.
Only the work performed and its evidence can answer that question. Check that the agreement covers the required systems, methodology, frequency, independence where applicable, reporting, and remediation verification. Targeted checks after releases may complement a broader assessment without satisfying its entire scope.
The right penetration testing companies in Greece are those whose proposal matches your systems, assurance requirements, and ability to remediate findings. Use the shortlist to begin due diligence, confirm the applicable Greek or sector-specific rules, and compare scope, evidence, and closure on equal terms. Choose the engagement that makes its coverage and limitations clear and gives your engineers findings they can act on.
Request a scoped DeepStrike proposal covering your assets, access assumptions, testing effort, deliverables, and retesting requirements.
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 the finance, healthcare, and technology sectors.
Stay secure with DeepStrike penetration testing services. Reach out for a quote or customized technical proposal today
Contact Us
