Top Penetration Testing Companies in the Czech Republic 2026

DeepStrike is listed first in this 2026 shortlist of penetration testing companies serving organizations in the Czech Republic. The guide compares 12 providers using current public evidence on Czech-market relevance, testing scope, specialist depth, delivery model, methodology transparency, reporting, remediation support, and evidence quality. It is designed for security, engineering, compliance, and procurement teams building a defensible shortlist. The right provider still depends on the assets in scope, required assurance depth, on-site needs, regulatory context, data-handling constraints, reporting expectations, and the buyer’s ability to remediate findings.

Comparing providers beyond Czech Republic? Our list of the top penetration testing companies worldwide covers firms that deliver testing across regions.

For nearby Central European markets, see Slovakia and Hungary.

Why this comparison exists

Czech buyers often need to compare very different delivery models: a local specialist who can work closely with engineering teams, an enterprise integrator that fits formal procurement, a niche lab for specialist assets, or a remote international provider for application and cloud work.

This guide is deliberately comparison-led. If you are looking specifically for DeepStrike's own service offering rather than a multi-provider shortlist, see DeepStrike's penetration testing services page.

There is no universal best provider. A defensible choice depends on the asset type, threat model, testing depth, reporting requirements, data-handling constraints, regulatory context, and how remediation and retesting will be managed.

How the companies were evaluated

The shortlist uses current first-party evidence and a consistent qualitative framework. The criteria are: confirmed penetration-testing capability; Czech headquarters, office, delivery presence, or explicit Czech-market relevance; testing-scope breadth; specialist depth; publicly documented methodology and deliverables; remote or on-site flexibility; reporting and remediation support where documented; and the quality and recency of public evidence.

No provider receives an invented score, star rating, or pseudo-scientific grade. The numbered order is an editorial shortlist, not a statistically validated league table.

At-a-glance comparison

1. DeepStrike: Application testing and remediation collaboration

Public offering: DeepStrike's penetration testing services describe human-led testing across applications, cloud environments, and infrastructure, supported by a findings and collaboration platform. Its public process covers planning, reconnaissance, vulnerability discovery, controlled exploitation, reporting, and technical support. Published reports include reproduction steps, remediation guidance, and root-cause information; the proposal should define exact coverage and commercial terms.

Czech Republic relevance: Founded in 2016, DeepStrike LLC is headquartered in Newark, Delaware, has 11–50 employees, and also publishes a business address in Dubai, UAE (IFZA Business Park). It delivers testing remotely for Czech clients; define tester locations, permitted subcontracting, and data-handling restrictions in the engagement agreement.

Team certifications: OSCP, OSWE, OSEP, OSWP, GXPN, GWAPT, eCPPT, eMAPT, eWPT, CREST CPSA, CRTP, CRTE, and Microsoft Azure Security Engineer Associate, as shown on DeepStrike's services page.

Official sources: Pricing , Contact Us

Buyer fit: Engineering teams that need application, cloud, or infrastructure testing with direct remediation collaboration.

2. Integra Czech Republic: Penetration testing alongside IT services

Public offering: Integra Czech Republic offers penetration testing of web applications, iOS and Android apps, REST and GraphQL APIs, external and internal infrastructure, AWS, Azure, and GCP cloud environments, IoT, and social engineering. It also provides cybersecurity audits and GAP analyses for NIS2 and ISO 27001 readiness and an online vulnerability scanning service, alongside IT outsourcing and custom software development.

Czech Republic relevance: Integra Czech Republic, s.r.o. is based in Prague 8, and its site does not list security accreditations. Define tester locations, permitted subcontracting, and data handling in the agreement.

Official sources: https://www.integra.cz/cs/penetracni-testy/; https://www.integra.cz/cs/kontakt/

Buyer fit: Czech organisations that want penetration testing and NIS2 or ISO 27001 readiness work from a local IT services provider.

3. Axians Czech Republic: Enterprise integrator with a testing practice

Public offering: Axians Czech Republic offers external and internal network penetration tests, web application testing based on the OWASP Web Security Testing Guide, on-premises Wi-Fi testing, Android and iOS application testing based on the OWASP Mobile Security Testing Guide, phishing campaigns, and OSINT analysis, and also lists penetration testing as a service (PTaaS) and OT testing experience. It states that it follows OSSTMM, PTES, and OWASP, emphasises manual testing, and delivers a report with a management summary, detailed findings, and remediation recommendations.

Czech Republic relevance: Axians Czech Republic s.r.o. is headquartered in Prague 4 (Chodov) with regional offices in Brno, Liberec, and Plzeň, and it publishes a penetration testing case study for the Czech Ministry of Justice. Confirm which team performs the test, permitted subcontracting, and data handling in the agreement.

Official sources: https://www.axians.cz/nase-reseni/kyberneticka-bezpecnost/penetracni-testovani/; https://www.axians.cz/kontaktujte-nas/

Buyer fit: Larger organisations and public-sector buyers that want penetration testing from an enterprise IT integrator with Czech offices.

4. CAPTES: Application and infrastructure testing specialist

Public offering: CAPTES offers penetration testing of web applications, internal and external infrastructure, and iOS and Android mobile applications, plus red teaming, code review, secure software development lifecycle (SSDLC) implementation, and security training. Its service page describes deliverables as an overview of real risks, with a proposed fix and concrete recommendations for each vulnerability found.

Czech Republic relevance: According to its contact page, CAPTES is operated by a sole trader based in Pardubice, and its site does not list certifications. Confirm who performs the testing, permitted subcontracting, insurance, and data handling in the agreement.

Official sources: https://www.captes.cz/penetracni-testy; https://www.captes.cz/kontakty

Buyer fit: Smaller Czech engineering teams that want to work directly with a specialist on application testing and secure development.

5. ARICOMA (formerly AEC): Testing, red teaming, and social engineering

Public offering: ARICOMA's penetration testing covers infrastructure, web applications (including automated web testing), mobile and desktop applications, Wi-Fi, ATMs, and large language model (LLM) applications, with an emphasis on manual testing and a detailed report with remediation recommendations. Related services include red team operations, social engineering (phishing, vishing, smishing), DoS and load tests, system and device audits, source code review, advanced white-box testing, and reverse engineering.

Czech Republic relevance: AEC adopted the ARICOMA name in September 2023, and the aec.cz domain now redirects to ARICOMA's announcement; ARICOMA cites more than 30 years of security experience in the Czech and Slovak Republics. Confirm the contracting ARICOMA entity, tester allocation, and data handling in the agreement.

Official sources: https://www.aricoma.com/cs/co-delame/kyberneticka-bezpecnost/penetracni-testy-a-vzdelavani-uzivatelu/penetracni-testy

Buyer fit: Larger Czech organisations that want penetration testing alongside red teaming, social engineering, and code review from one provider.

6. BDO Czech Republic: Testing within an advisory relationship

Public offering: BDO Czech Republic offers penetration testing of web, mobile, and desktop applications, IT infrastructure, and Wi-Fi networks, plus static and dynamic source code analysis and DoS and DDoS resilience testing. Its cybersecurity services also include vulnerability testing, social engineering, threat-led penetration testing (TLPT) under DORA, incident response, and CISO as a service. Its published process runs from pre-engagement and reconnaissance through threat modelling, exploitation, and reporting, with re-testing available on request.

Czech Republic relevance: BDO publishes its Czech cybersecurity services on bdo.cz in Czech and English, including a DORA-aligned TLPT offering. Confirm the contracting entity, who performs hands-on testing, and data handling in the agreement.

Official sources: https://www.bdo.cz/en-gb/services/digital-en/cybersecurity/penetration-testing; https://www.bdo.cz/cs-cz/kontakt

Buyer fit: Organisations, including financial entities preparing for DORA, that want technical testing coordinated with audit and advisory work.

7. Citadelo: Ethical hacking firm with a Prague entity

Public offering: Citadelo states that its certified ethical hackers manually test web applications, APIs, mobile applications, cloud environments, AI systems, and network infrastructure, using its own AI-powered tools during reconnaissance and analysis while final validation is done by an experienced tester. It also offers red teaming, social engineering, and AI security testing, and each finding includes remediation recommendations.

Czech Republic relevance: Citadelo lists a Czech entity, Citadelo Czech Republic, s.r.o., in Prague 7 (Holešovice), alongside offices in Bratislava, Slovakia, and Zug, Switzerland. Define tester locations, permitted subcontracting, and data handling in the agreement.

Certifications: Citadelo's certifications page lists specialist credentials including OSCP, OSWE, OSEP, OSED, BSCP, CEH, and CISSP.

Official sources: https://citadelo.com/en/penetration-testing; https://citadelo.com/en/contacts

Buyer fit: Organisations that want manual application, cloud, and AI testing or red teaming from a Central European offensive-security specialist.

8. Sec4good: Prague-based testing and NIS2 consultancy

Public offering: Sec4good tailors penetration tests to a scope that can include web applications and APIs, internal and external networks, wireless networks, mobile apps, IoT devices, endpoints and client applications, physical security, and social engineering. For web testing it cites OWASP WSTG, ASVS, API Security, and PTES, and states that scanner results are verified manually with attention to business-logic flaws. It also offers testing of AI-generated (“vibe-coded”) applications, autonomous pentesting with NodeZero, NIS2 GAP analysis, and phishing as a service.

Czech Republic relevance: Sec4good, s.r.o. lists its registered office in Prague 10 (Strašnice). Define tester locations, permitted subcontracting, and data handling in the agreement.

Certifications: Sec4good states that its specialists hold certifications including CEH and OSCP, and that it carries professional liability insurance.

Official sources: https://www.sec4good.cz/service-post/penetracni-testovani/; https://www.sec4good.cz/kontakt/

Buyer fit: Czech SMEs and mid-sized organisations that want penetration testing combined with NIS2 readiness support.

9. Etnetera Core: Security testing from a software development firm

Public offering: Etnetera Core is a custom software developer whose security services include penetration testing, vulnerability assessment, managed detection and response, incident response and forensic analysis, security awareness training, and OWASP-based web application security training. It states that every test includes concrete recommendations and remediation measures.

Czech Republic relevance: Etnetera Core a.s., a member of Etnetera Group, is based in Prague 7. Agree tester independence from delivery teams, tester locations, and data handling in the agreement.

Certifications: Etnetera Core states that its penetration testers hold certifications including OSCP, Certified Red Team Professional (CRTP), EC-Council CEH, MongoDB Security, and Red Hat Certified Engineer.

Official sources: https://www.etnetera.cz/security; https://www.etnetera.cz/kontakty

Buyer fit: Product and engineering teams that want security testing from a provider that also understands software delivery.

10. Auxilium Pentest Labs: Automotive and embedded systems testing

Public offering: Auxilium Pentest Labs specialises in automotive and embedded systems security, testing full vehicles and ECUs across infotainment, gateways, ADAS, on-board chargers, and combustion and EV powertrains, as well as AUTOSAR, software-defined vehicles, and charging stations. It also tests IoT devices and railway, ICS/SCADA, aerospace, medical, and defence systems, offers AI penetration testing, and provides UNECE R155/R156 and GB 44495 compliance support.

Czech Republic relevance: Auxilium states that it operates hardware penetration testing labs in Prague and Detroit. Agree lab versus on-site testing, handling of hardware and firmware, and data handling in the agreement.

Certifications: Auxilium states that it is TISAX AL3 certified.

Official sources: https://auxilium-labs.com/automotive-testing.html; https://auxilium-labs.com/

Buyer fit: Automotive OEMs, Tier-1 suppliers, and makers of embedded or safety-critical devices that need hardware-level testing.

11. EO Cyber (EO Security): Offensive security testing and training

Public offering: EO Cyber is the offensive security and training service of EO Security s.r.o. It offers web application, API, mobile, cloud (Azure, AWS, GCP), and network testing including Active Directory and Wi-Fi, source code review, social engineering with physical access testing, red and purple teaming that it describes as aligned with DORA and TIBER-EU, and vulnerability scanning. Its published process runs from scoping and proposal to testing, a report with proof and remediation recommendations for each finding, and a retest.

Czech Republic relevance: EO Security s.r.o. is headquartered in Brno, and its parent site also presents signals-intelligence and counter-surveillance products for government and critical infrastructure clients. Define tester locations, permitted subcontracting, and data handling in the agreement.

Certifications: EO Cyber lists team certifications including OSCP, OSCE, OSEP, OSWE, OSWP, CRTP, CRTE, CRTM, CARTP, CRTO, HTB CWES, and HTB CWPE, and membership of the Czech Chamber of Commerce and the Defence and Security Industry Association of the Czech Republic.

Official sources: https://security-testing.cz/en/; https://eo-security.com/

Buyer fit: Organisations with elevated threat profiles that want testing, red teaming, and training from a Czech offensive-security team.

12. MyCom Solutions: Penetration testing with managed IT services

Public offering: MyCom Solutions offers penetration testing as a one-off or recurring engagement, with interim updates during testing and a closing meeting that walks through results and recommended actions, and it also offers web application penetration testing and phishing tests. Its wider portfolio includes NIS2 and TISAX support, SIEM and log management, SOC, DLP, EDR, and IT outsourcing.

Czech Republic relevance: MyCom Solutions, s.r.o. is headquartered in Prague 9 with a branch in Most, and its site references the ČSN ISO/IEC 27001:2023 standard for information security management. Define tester locations, permitted subcontracting, and data handling in the agreement.

Official sources: https://mycom.cz/penetracni-testovani/; https://mycom.cz/kontakty/

Buyer fit: Czech SMEs that want penetration testing from a provider that can also run ongoing IT and security operations.

How to choose a penetration testing company in the Czech Republic

1. Start with the business goal

Decide whether the engagement is meant to validate one application, test a release before launch, assess an internal network, examine cloud controls, support a regulatory assurance process, or emulate a broader adversary objective. Do not begin with a vendor name and retrofit the scope afterward. If the objective is closer to adversary emulation, DeepStrike's red teaming as a service page explains how a red-team objective differs from a conventional penetration test.

2. Inventory the assets and environments

List production and non-production systems, identities, APIs, applications, networks, cloud accounts, mobile apps, wireless environments, and specialist assets. Cloud work should be explicitly scoped because provider permissions and platform rules can differ; DeepStrike's cloud penetration testing page illustrates why cloud scope should be treated separately. Likewise, separate browser-facing web application penetration testing from native mobile application penetration testing when both exist in the same product ecosystem.

3. Choose test depth and knowledge level

Clarify authenticated versus unauthenticated testing, whether source code or architecture information will be available, what user roles exist, and which business workflows matter. A strong proposal should explain where manual analysis is used rather than implying that a scanner alone is a penetration test.

4. Define delivery, legal, and data constraints

Agree testing windows, production-safety limits, emergency contacts, IP allowlists, data-access boundaries, subcontractor rules, data residency, and on-site requirements. For fast-moving environments, a periodic or continuous penetration testing model may be worth evaluating, but frequency should follow risk and change rate rather than a generic schedule.

5. Compare evidence, reporting, and retesting

Ask for a sample report structure, severity methodology, evidence-handling approach, executive summary format, technical remediation guidance, and retesting terms. The goal is to understand how findings move from discovery to verified closure.

For a deeper procurement framework, use the 25 questions to ask a penetration testing company as a companion checklist rather than relying on certifications or brand recognition alone.

Local Czech provider vs remote international provider

A local provider may be preferable when the engagement requires frequent on-site work, physical access, Czech-language workshops, local procurement familiarity, or tightly coordinated infrastructure testing. It may also simplify stakeholder communication when business and technical teams want the tester physically present.

A remote international specialist can be appropriate for web, API, cloud, and other remotely reachable environments when data-handling, contracting, time-zone, communication, and access requirements are clear. The decision should be based on delivery constraints and evidence, not on the assumption that local is always deeper or remote is always cheaper.

For buyers comparing delivery categories rather than individual brands, DeepStrike's broader penetration testing vendor guide can be used to structure the shortlist.

Czech and EU requirements: when penetration testing may be relevant

Czech cybersecurity law

Czech Act No. 264/2025 Coll. became effective on November 1, 2025. The official act should be checked in e-Sbírka when determining whether an organization falls within the current Czech cybersecurity framework.

For organizations in the higher-obligation regime, Decree No. 409/2025 contains specific penetration-testing language in Section 24(5), including testing before operation, after significant change, regularly at least every two years, and retesting of findings. Buyers should verify the exact current text in Decree No. 409/2025 before translating it into a testing calendar.

That higher-regime language should not be generalized to every Czech organization. Decree No. 410/2025 governs the lower-obligation regime, and this guide did not identify an equivalent universal penetration-testing rule. NÚKIB's NIS2 and Czech implementation portal is the appropriate starting point for entity and regime questions.

GDPR

GDPR Article 32 requires appropriate technical and organizational measures and a process for regularly testing, assessing, and evaluating the effectiveness of security measures. It does not say that every controller or processor must conduct a penetration test on a universal schedule. The European Commission's data-protection obligations guidance should be read alongside the organization's actual risk and processing context.

DORA, ISO/IEC 27001, and PCI DSS

DORA's threat-led penetration-testing framework applies according to entity and selection criteria; it should not be presented as a universal obligation for every financial organization. The controlling text is available through EUR-Lex.

ISO/IEC 27001 should be treated as a risk-based management-system standard, not as proof that every certified organization must follow one universal pentest schedule. PCI DSS is relevant only to in-scope payment environments, and teams should verify the exact current PCI DSS v4.0.1 penetration-testing requirements that apply to their cardholder-data environment rather than extrapolating them to unrelated systems.

This section is practical security and procurement guidance, not legal advice. Confirm legal and regulatory obligations with qualified Czech, EU, and sector specialists.

Penetration testing cost and scoping factors in the Czech Republic

This guide does not use inherited CZK daily-rate estimates because a comparable current local price basis was not established. Pricing should be evaluated against the actual statement of work, not a generic market band.

The largest cost drivers are usually the number and complexity of assets, credential or source-code access, required test depth, production constraints, on-site travel, social-engineering or physical components, cloud or multi-account scope, OT/automotive/embedded requirements, reporting expectations, retesting, and urgency.

DeepStrike's penetration testing pricing guide can help structure scoping questions, but buyers should still request a quote that states what is included, what triggers a change order, and whether remediation support and retesting are included.

Procurement and statement-of-work checklist

Before signing, require a statement of work that makes the following points explicit:

• legal entity and contracting party;
• systems and environments in scope;
• authenticated and unauthenticated coverage;
• source-code or architecture access;
• production-safety constraints;
• allowed and prohibited techniques;
• testing window and emergency contacts;
• data handling, retention, deletion, residency, and encryption;
• subcontractors and tester access controls;
• tester qualifications relevant to the actual scope;
• severity methodology;
• executive and technical report deliverables;
• remediation collaboration;
• retesting terms;
• on-site requirements;
• insurance and procurement requirements;
• regulatory or independence constraints;
• final acceptance criteria.

Treat generic claims such as "compliance ready," "best in class," or "industry leading" as marketing until the vendor connects them to a concrete deliverable and your actual regulatory scope.

Frequently asked questions

What are the top penetration testing companies serving the Czech Republic?

This 2026 editorial shortlist includes DeepStrike, Integra Czech, Axians Czech Republic, CAPTES, ARICOMA (formerly AEC), BDO Czech Republic, Citadelo, Sec4good, Etnetera Core, Auxilium Pentest Labs, EO Security / EO Cyber, and MyCom Solutions. The order is not a universal scientific ranking; the right provider depends on asset type, delivery requirements, specialist depth, evidence quality, and procurement constraints.

Should a Czech company choose a local or international penetration testing provider?

Choose local delivery when on-site work, Czech-language collaboration, local contracting, or physical access materially affects the engagement. A remote international provider can work well for web, API, cloud, and other remotely reachable systems when data, access, time-zone, and communication requirements are clear.

How much does penetration testing cost in the Czech Republic?

There is no reliable universal price for a Czech pentest. Cost depends on the number and complexity of assets, access level, test depth, environment constraints, specialist hardware or OT requirements, reporting, travel, urgency, and retesting. Ask vendors to price the same written scope so quotes are comparable.

Does Czech cybersecurity law or NIS2 require penetration testing?

Not for every Czech organization on one universal schedule. The higher-obligation regime under Decree No. 409/2025 contains specific penetration-testing language, while the lower-obligation regime should not automatically be treated the same way. Determine which regime and systems apply before setting a testing schedule.

What should a professional penetration testing report include?

A useful report should include an executive summary, scope and limitations, methodology, prioritized findings, evidence sufficient for authorized reproduction, business and technical impact, remediation guidance, and a clear retest status when fixes are verified. Buyers should ask to see a sanitized sample structure before contracting.

Can penetration testing be performed remotely?

Yes, many web, API, cloud, external-network, and application tests can be delivered remotely when access and safety controls are defined. On-site delivery may still be necessary for internal networks, physical environments, wireless coverage, hardware, OT, or engagements with strict local-access requirements.

How often should an organization retest after remediation?

Retesting should follow the risk and remediation plan rather than an arbitrary calendar. Critical fixes may warrant prompt verification, while broader recurring testing should reflect system change rate, threat exposure, sector requirements, and applicable law or standards. Contractually define what a retest covers and when it is available.

Discuss your penetration testing scope with DeepStrike

If you are evaluating a penetration test for a Czech organization, DeepStrike can review your asset scope, delivery constraints, and reporting needs and help define an appropriate engagement without assuming that one testing model fits every organization.

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 the finance, healthcare, and technology sectors.