Top Penetration Testing Companies in Bulgaria for 2026 Buyers

Updated: August 2026. Company profiles, Bulgaria relevance, NIS2 status, 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, tester assignment, onsite capability, accreditation, data handling, and contract terms before procurement.

Executive Summary

• Intended buyer profile: enterprise security leaders, regulated organizations, cloud-first product teams, and procurement owners shortlisting Bulgaria penetration testing providers in 2026.
• Best overall provider: DeepStrike
• Best Bulgaria-based specialist: SoCyber
• Best for enterprise and formal assurance: PwC Bulgaria
• Best for long-established local penetration testing: LIREX
• Best for security-testing-as-a-service: AMATAS
• Best for enterprise cyber + SOC integration: DIGITALL
• Best emerging specialist: CyberXperts
• Best for SMB and mid-market: BaseLine
• Best for autonomous / continuous testing: Cyberware
• Best for compliance-heavy and aviation environments: SM Tech
• Decision insight: in the Bulgaria market, local accessibility can help contracting and governance, but validated exploitability, reporting clarity, and cloud/API depth usually matter more than brand size or scanner volume.

Quick Comparison: Top Penetration Testing Companies in Bulgaria

Market Risk Context

With the global average cost of a data breach at USD 4.99 million in IBM’s 2026 study, the question behind top penetration testing companies Bulgaria is fundamentally about loss containment, control validation, and whether a provider can surface real attacker paths before a breach, ransomware event, or business interruption hits. That figure is global, not Bulgaria-specific.

Stolen credentials remain a major breach vector, while ENISA continues to identify identity abuse and stolen credentials as important causes of compromise. AI-assisted offensive capability also continues to grow, increasing the value of providers that can validate realistic attacker behavior rather than produce scan-heavy checklists.

In Bulgaria, buyer scrutiny has increased further because the Cybersecurity Act was formally amended in February 2026 to transpose NIS2 into national law. The amendment was adopted by the National Assembly on 5 February 2026 and published in the State Gazette, issue 17, on 13 February 2026. The revised framework widens scope and strengthens risk-management and incident-reporting expectations for covered public and private entities.

For finance-sensitive organizations, DORA has applied since 17 January 2025 and explicitly covers digital operational resilience testing for in-scope financial entities. GDPR, by contrast, remains risk-based under Article 32 and does not create a universal named pentest requirement for every buyer.

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, and buyers should conduct independent due diligence.

Definition

Penetration testing is a structured adversarial security assessment that combines automated vulnerability discovery with manual exploit validation to identify real-world attack paths, validate control effectiveness, and reduce breach probability.

Why Bulgaria Buyers Evaluate Penetration Testing Providers Differently

Buyer behavior in Bulgaria is shaped by two overlapping pressures: local governance scrutiny and uneven provider depth. The Cybersecurity Act changes in 2026 widen the scope of entities facing formal cybersecurity obligations, including sectors such as banking, financial market infrastructure, healthcare, digital infrastructure, public bodies, and other essential or important entities, while DORA adds direct resilience-testing relevance for in-scope financial entities.

That means buyers are often selecting a pentest provider not only for engineering value, but also for how well the output will stand up in audit, board, risk, and remediation workflows.

That local context changes vendor selection. Bulgaria buyers often need stronger remediation clarity, cleaner executive reporting, and more explicit methodology than markets where pentesting is already deeply standardized. They also face a practical trade-off between local provider familiarity and the specialist depth sometimes offered by cross-border firms. For cloud-native and API-heavy environments, identity paths, business logic, and release velocity matter more than perimeter scanning alone.

For public-sector, healthcare, infrastructure-sensitive, or finance-sensitive environments, formal scope control and evidence-backed reporting usually matter more than aggressive marketing language.

How We Ranked the Top Penetration Testing Companies Bulgaria Buyers Compare in 2026

The ranking favors validated exploitability over scan-heavy output. NIST defines penetration testing as mimicking real-world attacks and notes that effective tests often combine multiple weaknesses to gain more access than a single flaw would allow. OWASP frames web security testing as a structured best-practice discipline, not just an automated scan.

Providers therefore scored higher when public evidence showed manual testing depth, realistic attack simulation, exploit chaining, or red-team capability, and lower when public materials leaned mainly on generic automation claims.

Provider-level assurance and individual credentials are treated separately. ISO certifications, CREST company accreditation, PCI assessor status, or other organizational credentials are not the same as practitioner certifications such as OSCP, OSWE, OSEP, CREST CRT/CCT, GIAC, CISSP, CEH, or CRTO.

Capabilities not clearly evidenced in reviewed material were treated as unproven. Brand scale did not automatically increase rank. A large network can improve coverage and governance support, but a smaller specialist can still rank higher if public evidence shows deeper manual testing, clearer reporting, and stronger cloud/API focus.

How to Choose the Right Penetration Testing Company in Bulgaria

• Define the real attack surface. Decide whether the scope is external infrastructure, internal networks, web applications, APIs, mobile, cloud, Active Directory, identity, OT, social engineering, red teaming, or a combined engagement.
• Separate scanning from penetration testing. Ask how much of the work is manual and how testers validate exploitability, business logic, authorization flaws, privilege escalation, and chained attack paths.
• Check the assigned testers. Company certifications matter, but buyers should verify who will actually conduct and review the engagement.
• Confirm rules of engagement. Define authorization, test windows, exclusions, production restrictions, escalation contacts, and stop-work conditions.
• Review a sample report. Strong reports should include technical evidence, business impact, prioritization, reproducible findings, and remediation guidance.
• Confirm critical-finding escalation. Severe issues should be reported during testing rather than waiting for the final deliverable.
• Verify retesting terms. Confirm whether remediation validation is included, time-limited, or separately charged.
• Match compliance to the real framework. NIS2/Bulgarian Cybersecurity Act, DORA, PCI DSS, ISO 27001, GDPR, and customer requirements all have different evidence needs.
• Check data-handling and delivery conditions. Cross-border providers should be assessed for tester location, evidence storage, legal jurisdiction, language, and onsite requirements.
• Compare outcome, not headline price. Scope, tester seniority, manual effort, evidence quality, report depth, and retesting matter more than the cheapest quote or the longest tool list.

Top Penetration Testing Companies in Bulgaria for 2026

DeepStrike

• Headquarters: United States; public site lists Newark, Delaware as the U.S. address and also lists a UAE office.
• Founded: Public material reviewed for this update does not provide a reliable company founding date that should drive procurement.
• Company Size: Public company-size figures vary by source and should be verified directly.
• Primary Services: Penetration testing, web application testing, mobile testing, cloud penetration testing, continuous penetration testing, and red teaming.
• Industries Served: Technology and SaaS environments are directly evidenced by public customer references; broader regulated-environment relevance appears through PCI DSS, ISO 27001, HIPAA, HITRUST, and SOC 2 reporting claims.

Why They Stand Out

DeepStrike stands out in this ranking for a manual-first testing model, explicit cloud and continuous-testing coverage, and unusually detailed public evidence around reporting, remediation support, attestation, and re-testing. Its public materials also show a smaller, more specialized operating model than large consulting networks, which matters for buyers trying to avoid heavy coordination layers.

Editorial note: DeepStrike publishes this guide and reserves the first position for DeepStrike. Competitor profiles are evaluated using the evidence categories described above.

Bulgaria Relevance

This provider is relevant to Bulgaria buyers that prioritize cross-border specialist depth, cloud-native attack-surface coverage, and continuous validation of new releases and APIs. Buyers with strict local-office, onsite, residency, public-sector, or Bulgarian-language requirements should confirm those conditions in advance because they are not clearly evidenced in the reviewed public material.

Testing Depth Model

Manual exploit chaining. Public materials explicitly describe manual assessments, realistic threat-actor behavior, exploitation-impact validation, and cloud, web, mobile, red-team, and social-engineering work.

Key Strengths

• Manual-first testing and explicit exploit validation.
• Cloud, web, mobile, red-team, and continuous-testing coverage.
• Detailed reports, remediation guidance, attestation letters, technical presentations, and dashboard-based workflow support.
• Publicly stated retesting support and testing of new features and APIs in continuous models.

Potential Limitations

• No clearly evidenced Bulgaria office or Bulgaria-specific delivery footprint.
• Public-sector, finance, or healthcare references specific to Bulgaria are not clearly enumerated.
• Buyers with complex multi-country procurement structures should confirm staffing and escalation paths directly.

Best For

Cloud-first SaaS companies, API-heavy products, modern digital businesses, and cross-border buyers that want manual depth without a large-consultancy delivery model.

SoCyber

• Headquarters: Sofia, Bulgaria.
• Primary Services: Network, web application, mobile application, and API penetration testing; security-as-a-service; incident response; AI security; compliance and remediation tracking.
• Industries Served: Banking, fintech, e-commerce, critical infrastructure, manufacturing, and other organizations handling sensitive data.

Why They Stand Out

SoCyber is one of the strongest Bulgaria-headquartered pure cybersecurity providers in the current market. Its public material states that engagements are senior-led and highlights more than 400 completed engagements across 150+ organizations. It also publishes a broad offensive-security credential set that includes OSCP, OSWE, OSEP, OSED, CRTO, CREST Registered Penetration Tester, mobile-testing and cloud-security certifications.

Bulgaria Relevance

SoCyber was founded in Bulgaria and is headquartered in Sofia. It is particularly relevant to buyers that want a local specialist rather than a large IT-services wrapper.

Testing Depth Model

Senior-led hybrid/manual model. Public material emphasizes production-system experience, developer-ready remediation, penetration testing, and continued remediation visibility through its Kikimora platform.

Key Strengths

• Explicit API, web, mobile, and network penetration-testing coverage.
• Strong publicly visible offensive-security credentials.
• Senior-led engagement model.
• Local Sofia delivery and remediation tracking.

Potential Limitations

• Large multi-country execution scale is smaller than global consultancies.
• Buyers should still confirm exact retest scope, onsite requirements, and allocated testing days.

Best For

Application-heavy firms, fintech, finance, e-commerce, and buyers that want a Bulgaria-based senior-led security-testing specialist.

PwC Bulgaria

• Headquarters: Sofia, Bulgaria for the local member firm.
• Primary Services: Penetration testing, application security reviews aligned to OWASP, red-team engagements, social engineering, source-code reviews, mobile testing, and network reviews.
• Industries Served: Broad enterprise coverage across PwC’s global industry network.

Why They Stand Out

PwC Bulgaria stands out for enterprise-fit governance, formal standards language, and breadth of testing options that extend beyond conventional internal and external pentests into red team, social engineering, mobile, source-code, and digital-identity-adjacent work.

Bulgaria Relevance

This provider is directly relevant to Bulgaria buyers that need a local office, board-level reporting support, and a provider model aligned with large enterprises, finance-sensitive organizations, and audit-heavy decision structures.

Testing Depth Model

Red-team oriented. Public material shows standards-based penetration testing and red-team engagements designed to emulate more realistic attacker behavior.

Key Strengths

• Broad service scope across application, network, code, mobile, and red-team scenarios.
• Local Sofia office and Bulgaria-based cyber capability.
• Strong board, risk, audit, and enterprise assurance context.

Potential Limitations

• Public materials do not clearly state re-testing inclusion or commercial packaging.
• Large-firm delivery can introduce heavier coordination for smaller buyers.
• Public Bulgaria-specific case references for pentesting are limited.

Best For

Large enterprises, regulated environments, and organizations that need formal assurance language alongside technical testing.

LIREX

• Headquarters: Sofia, Bulgaria.
• Primary Services: Penetration testing, security audits, integrated security, SOC, identity and access management, SIEM, security checkups, awareness, and consulting.
• Industries Served: Financial institutions, insurance companies, cloud providers, healthcare, manufacturing, e-commerce, public sector, and foreign governmental/non-governmental organizations.

Why They Stand Out

LIREX is one of the most important local omissions from the earlier shortlist. Its official site states that it has specialized in penetration testing for more than 10 years and explicitly distinguishes expert-led penetration testing from fully automated vulnerability testing. Its methodology focuses on identifying, verifying, and assessing vulnerabilities in the customer’s real environment and producing prioritized recommendations.

Bulgaria Relevance

LIREX is a long-established Bulgarian IT and cybersecurity provider with direct Sofia presence and extensive local enterprise delivery.

Testing Depth Model

Manual expert / enterprise hybrid model. Public material emphasizes expert intelligence, simulated attacks, manual verification, web/mobile/network testing, and long-term scheduled testing programs.

Key Strengths

• More than a decade of explicit penetration-testing delivery.
• Clear manual/expert validation positioning.
• Strong local enterprise and public-sector relevance.
• Broad security, SOC, IAM, SIEM, and compliance integration.

Potential Limitations

• Pentesting is part of a broad IT-services portfolio rather than the company’s only specialization.
• Buyers should confirm API/cloud attack-path depth and retest terms for modern product-security scopes.

Best For

Bulgarian enterprises, financial institutions, public-sector organizations, and buyers seeking local testing tied to broader security operations.

AMATAS

• Headquarters: Bulgaria-based cybersecurity company.
• Primary Services: Penetration testing, vCISO, vDPO, MXDR, managed security awareness, and managed IT/security services.
• Industries Served: Cross-industry organizations requiring outsourced cybersecurity capability.

Why They Stand Out

AMATAS is another significant Bulgarian cybersecurity company that was missing from the original article. Public Bulgarian cybersecurity-industry material describes AMATAS as providing penetration testing alongside MXDR, virtual CISO/DPO, managed awareness, and broader cybersecurity-as-a-service programs.

AMATAS is also closely connected to the development of Plainsea, an AI-assisted pentesting platform that grew out of the company’s penetration-testing experience.

Bulgaria Relevance

AMATAS is a Bulgaria-founded cybersecurity organization with a visible role in the local security community and direct penetration-testing delivery.

Testing Depth Model

Service-led / human testing with growing automation support. Public material emphasizes practitioner-led penetration testing while Plainsea is being developed to automate repetitive parts of the pentesting workflow rather than simply replace expert judgment.

Key Strengths

• Explicit penetration-testing service.
• Strong Bulgaria cybersecurity-market presence.
• vCISO, MXDR, awareness, and managed-service integration.
• Innovation around AI-assisted pentesting through Plainsea.

Potential Limitations

• Buyers should distinguish AMATAS consulting services from Plainsea’s platform capabilities.
• Public standardized retest and pricing terms are limited.

Best For

Organizations that want penetration testing combined with broader outsourced cybersecurity, MXDR, or vCISO capability.

DIGITALL

• Headquarters: International technology company with a major Bulgaria presence in Sofia.
• Primary Services: Internal, Wi-Fi, web, mobile and infrastructure penetration testing; breach and attack simulation; posture assessment; blockchain assessment; SOC; threat intelligence.
• Industries Served: Banking, airports, financial services, enterprise, infrastructure and digital businesses.

Why They Stand Out

DIGITALL has one of the most detailed public penetration-testing methodologies among Bulgaria-visible enterprise providers. Its current security portfolio explicitly covers web, mobile, internal infrastructure, Wi-Fi and enterprise-wide penetration testing, plus breach and attack simulation.

The company says it follows methodologies and standards including OWASP, NIST SP 800-115, PTES, OSSTMM and ISSAF, and publicly lists offensive-security credentials across its team.

Bulgaria Relevance

DIGITALL has a Sofia office and a substantial Bulgaria-based technology and cyber-security presence.

Testing Depth Model

Enterprise hybrid/manual model. Public material describes a cycled process involving testing, identification, documentation, retesting, and final reporting.

Key Strengths

• Web, mobile, internal, Wi-Fi and infrastructure testing.
• Explicit retesting in the published methodology.
• Breach and attack simulation.
• SOC and threat-intelligence integration.
• Strong Bulgaria enterprise footprint.

Potential Limitations

• Broad digital-transformation organization rather than pure-play offensive boutique.
• Buyers should confirm the exact pentest team and manual effort allocated.

Best For

Large enterprises that want penetration testing integrated with SOC, threat intelligence, managed security, and broader transformation programs.

CYBERONE

• Headquarters: Sofia, Bulgaria.
• Founded: 2018.
• Primary Services: Penetration testing, vulnerability assessment, risk assessment, SOC as a service, awareness, policy services, and breach investigation.
• Industries Served: IT, call centers, travel, manufacturing, insurance, real estate, commerce, retail, and startups.

Why They Stand Out

CYBERONE pairs local penetration testing with adjacent security operations and governance services. Public material provides strong visibility into practitioner credentials and company-level ISO certifications.

Bulgaria Relevance

The company is directly relevant to Bulgaria buyers through its Sofia office and its SOC, operating since 2019.

Testing Depth Model

Hybrid model. Public pages distinguish penetration testing simulating real attacks from separate automated vulnerability assessment.

Key Strengths

• Local SOC in Sofia.
• Wide offensive-security credential mix including OSCP and related qualifications.
• Pentesting plus monitoring and governance.

Potential Limitations

• API-specific testing maturity is less detailed publicly than some specialists.
• Retesting terms and reporting samples are not clearly published.

Best For

Bulgaria-based organizations that want local pentesting, SOC, and governance support in one stack.

Atlant Security

• Headquarters: Sofia, Bulgaria.
• Founded: 2013.
• Primary Services: Penetration testing, IT security audits, vCISO, ISO 27001, NIS2, DORA and SOC 2 preparation.
• Industries Served: Growing businesses and organizations needing security assurance and compliance support.

Why They Stand Out

Atlant Security is a Bulgarian cybersecurity boutique founded by Alexander Sverdlov, a former Microsoft security consultant. Current public material states that the company has completed more than 200 security audits across 14 countries and offers penetration testing alongside broader security audit and compliance services.

Bulgaria Relevance

The company is headquartered in Sofia and publishes Bulgaria-specific guidance on penetration testing, pricing expectations, and security procurement.

Testing Depth Model

Founder-led boutique model. Atlant emphasizes defined-scope engagements, security audits, hands-on assessment and practical remediation.

Key Strengths

• Sofia headquarters.
• Long operating history for a local boutique.
• Public security-audit and penetration-testing track record.
• Strong ISO/NIS2/DORA/SOC 2 advisory context.

Potential Limitations

• Smaller delivery scale than large consultancies.
• Buyers should confirm red-team, mobile, OT, and large concurrent program capabilities where required.

Best For

SMBs, mid-market companies, and organizations that want founder-led security assessment combined with compliance guidance.

BaseLine

• Headquarters: Sofia, Bulgaria.
• Founded: 2006 according to the company’s current about page.
• Primary Services: Penetration testing, red team, SOC as a Service, vulnerability management, cloud security, awareness, consultancy and vCISO.
• Industries Served: Startups through critical-infrastructure organizations.

Why They Stand Out

BaseLine combines local market accessibility with a practical pentest-plus-SOC service mix. The current company page lists an offensive-security team with OSCP, OSWE and GPEN credentials and states that it has protected more than 150 organizations.

Bulgaria Relevance

BaseLine is Sofia-based and has operated in the Bulgarian market since 2006.

Testing Depth Model

Hybrid model. Public materials evidence penetration testing, red-team capability, cloud security, vulnerability management and a 24/7 SOC.

Key Strengths

• Strong local history.
• Offensive-security practitioner credentials.
• SOC and compliance integration.
• Useful SMB/mid-market procurement fit.

Potential Limitations

• Very large multi-country delivery scale is smaller than global consulting networks.
• Buyers should confirm standard retest policy and report format.

Best For

SMB and mid-market buyers in Bulgaria that want local pentesting and operational follow-through.

Cyberware

• Headquarters: Sofia, Bulgaria.
• Founded: 2022.
• Primary Services: Autonomous penetration testing, web/API/mobile/desktop penetration testing, code review, attack-surface management, red/purple team and governance/compliance.
• Industries Served: Cross-industry digital buyers.

Why They Stand Out

Cyberware is unusual because its primary positioning is autonomous penetration testing that identifies, exploits, and verifies vulnerabilities. It is a strong comparison point for buyers evaluating continuous testing, AI-enabled pentesting, or high-change software environments.

Bulgaria Relevance

The company is headquartered in Sofia.

Testing Depth Model

Automation-heavy. The model emphasizes scalable verified-impact testing rather than classic consultant-led delivery.

Key Strengths

• Explicit exploit verification.
• Web, API, mobile, desktop and code-review coverage.
• Continuous/autonomous testing model.
• Strong fit for rapidly changing products.

Potential Limitations

• Automation-centric delivery may not fit every regulated or board-sensitive engagement.
• Buyers should confirm human oversight, onsite capability, retesting terms and auditor acceptance.

Best For

High-change SaaS teams, API-heavy environments, and buyers comparing autonomous testing against conventional pentest models.

CyberXperts

• Headquarters: Sofia, Bulgaria.
• Founded: 2025.
• Primary Services: Penetration testing of infrastructure, Active Directory, APIs, web and mobile applications; attack-surface management; breach and attack simulation; MXDR; forensics; threat intelligence; GRC.
• Industries Served: Cross-industry businesses requiring security validation and managed defense.

Why They Stand Out

CyberXperts is one of the strongest new Bulgarian entrants. The company was founded by security professionals with backgrounds in AMATAS, DIGITALL and Telelink Business Services and has an explicit Security Testing & Validation service covering infrastructure, Active Directory, APIs, web and mobile applications.

Bulgaria Relevance

CyberXperts is headquartered in Business Park Sofia.

Testing Depth Model

Hands-on hybrid model. Public material combines penetration testing and attack-surface validation with BAS, threat hunting, investigations and MXDR.

Key Strengths

• Clear infrastructure, AD, API, web and mobile scope.
• Sofia-based specialist team.
• BAS, ASM, threat intelligence and MXDR integration.
• Public customer evidence for penetration-testing work.

Potential Limitations

• Young company with a shorter public operating history.
• Buyers should validate team capacity and references for very large concurrent programs.

Best For

Bulgarian businesses wanting modern security validation, identity/application testing, and managed detection under one specialist provider.

EY Bulgaria

• Headquarters: Sofia, Bulgaria.
• Primary Services: Cybersecurity risk, penetration testing, dynamic/static application testing, vulnerability management, security operations, incident response and threat exposure management.
• Industries Served: Large enterprise and regulated sectors.

Why They Stand Out

EY’s Bulgaria cybersecurity material explicitly includes controlled penetration testing and application testing within its cyber threat management and response portfolio. This makes EY a credible local enterprise option rather than a generic global-name inclusion.

Bulgaria Relevance

EY has a Sofia office and Bulgaria-specific cybersecurity and managed-security pages.

Testing Depth Model

Enterprise assurance model. Pentesting is integrated with vulnerability management, threat exposure, risk, incident response and wider cyber transformation.

Key Strengths

• Direct Sofia presence.
• Explicit controlled penetration-testing capability.
• Strong risk, governance and resilience integration.
• Access to EY’s wider global cyber and red-team resources.

Potential Limitations

• Local public pages provide less detail about the exact Bulgaria pentest team than specialist providers.
• Big Four commercial processes may be heavy for smaller scopes.

Best For

Large enterprises and regulated organizations that want pentesting tied to wider cyber-risk and resilience programs.

Deloitte Bulgaria

• Headquarters: Sofia, Bulgaria within Deloitte Central Europe.
• Primary Services: Penetration testing, cloud and OT testing, hardware testing, code scanning, red teaming, purple teaming, breach and attack simulation, attack-surface management and MXDR.
• Industries Served: Large enterprise, financial services, automotive, industrial and regulated sectors.

Why They Stand Out

Deloitte’s current Cyber Attack Surface Management portfolio is one of the broadest enterprise offerings in the shortlist. It explicitly combines manual and automated penetration testing with cloud, OT, hardware, red/purple team, BAS and remediation workflow.

Bulgaria Relevance

Deloitte Bulgaria has a local consulting team and Cyber Risk Services presence, while specialist offensive-security delivery may be regional or Central European depending on scope.

Testing Depth Model

Enterprise hybrid / red-team model. Deloitte describes manual and automated penetration testing plus deep offensive-security and red-team services.

Key Strengths

• Local Bulgaria consulting presence.
• Large CE/global offensive-security capability.
• Cloud, OT, hardware, code, red/purple team and TLPT/TIBER experience in the wider network.
• Strong enterprise governance and remediation workflow.

Potential Limitations

• Buyers should confirm whether the assigned offensive team is Bulgaria-based or regional.
• Big-firm scope and commercial structure may be excessive for narrow tests.

Best For

Large enterprises, finance, industrial/OT and buyers needing pentesting integrated with a broader cyber-risk program.

KPMG Bulgaria

• Headquarters: Sofia and Varna, Bulgaria.
• Primary Services: Cybersecurity advisory, risk assessment, cyber maturity, resilience, technology risk, privacy and broader KPMG cyber-defense services.
• Industries Served: Large private and public-sector organizations.

Why They Stand Out

KPMG Bulgaria has direct local cyber-security and IT-advisory capability backed by KPMG’s wider international cyber-defense organization. Its Bulgaria pages emphasize cyber-risk assessment, resilience and technology-security advisory.

Bulgaria Relevance

KPMG maintains offices in Sofia and Varna and has a local IT Advisory / Cyber Security team.

Testing Depth Model

Enterprise advisory / regional delivery model. Buyers requiring penetration testing should confirm which KPMG member-firm technical team will execute the work, because Bulgaria-specific public pages do not describe a local dedicated penetration-testing bench as clearly as specialist providers.

Key Strengths

• Direct Bulgaria advisory presence.
• Strong risk, resilience, privacy and governance capability.
• Access to KPMG’s wider cyber-defense and technical-security network.
• Good enterprise procurement and board-level context.

Potential Limitations

• Bulgaria-specific public evidence for hands-on pentesting is less explicit than SoCyber, LIREX, CYBERONE, or DIGITALL.
• Delivery entity, tester location and methodology should be confirmed during procurement.

Best For

Enterprise buyers already using KPMG or organizations needing cyber-risk and technical assurance inside a broader advisory program.

SM Tech

• Headquarters: Sofia, Bulgaria.
• Primary Services: Penetration testing, vulnerability assessment, incident response and forensics, managed security, system protection, security-awareness training and compliance.
• Industries Served: Aviation, regulated industries and growing businesses.

Why They Stand Out

SM Tech is a Bulgaria-based cybersecurity consultancy that publicly lists penetration testing and vulnerability assessment as core services and specializes in aviation cybersecurity and regulated-industry compliance.

Bulgaria Relevance

The company is based in Sofia and targets Bulgarian and European regulated organizations.

Testing Depth Model

Compliance-led hybrid model. Public material positions testing within practical audit, remediation and ongoing security oversight.

Key Strengths

• Direct Sofia presence.
• Penetration-testing and vulnerability-assessment services.
• Aviation and regulated-industry specialization.
• IR, forensics, managed security and compliance support.

Potential Limitations

• Public material gives less detail on red-team, API, mobile or advanced exploit-chaining methodology.
• Buyers should request tester profiles and sample technical reporting.

Best For

Aviation-sector organizations, regulated companies, and growing businesses seeking security testing plus compliance support.

Plainsea

• Headquarters: Sofia, Bulgaria, with U.S. offices.
• Founded: 2022.
• Primary Services: AI-assisted / agentic penetration-testing workflow platform designed to accelerate pentesting tasks, reporting, collaboration and remediation.
• Industries Served: Security teams and service providers looking to scale penetration-testing workflows.

Why They Stand Out

Plainsea is not a conventional consulting company and should not be evaluated as if it were one. It is included because it is a Bulgarian-founded security-testing technology company built out of AMATAS penetration-testing experience. Public reporting in 2026 describes its goal as using AI agents to reduce repetitive pentesting work while keeping experienced practitioners at the top of the workflow.

Bulgaria Relevance

Plainsea maintains a Sofia office and has roots in Bulgaria’s penetration-testing community.

Testing Depth Model

AI-assisted / platform model. The product aims to automate and structure parts of the penetration-testing lifecycle rather than act as a traditional consulting team.

Key Strengths

• Bulgaria-founded pentesting technology.
• Strong relevance to AI-assisted testing and modern workflow automation.
• Close connection to practitioner-led penetration-testing experience.
• Useful comparison point for organizations evaluating automation.

Potential Limitations

• Not a direct substitute for a traditional human-led penetration-testing consultancy.
• Buyers should clarify whether they need platform tooling, a managed service, or a full manual engagement.

Best For

Internal security teams and pentest service providers looking to automate repetitive testing workflow and remediation management.

Comparison Table

What Buyers in Bulgaria Get Wrong When Comparing Penetration Testing Firms

The biggest comparison error is treating pentesting as a brand purchase instead of a methodology purchase. Large firms can be useful for enterprise governance, but they do not automatically deliver deeper exploit validation. A second mistake is overvaluing automation. Vulnerability assessment has value, but it is not the same as testing whether chained weaknesses can actually produce administrative access, material data exposure, or control failure.

A third mistake is ignoring reporting quality. In Bulgaria’s more audit-sensitive buying environment, a vague PDF with weak remediation guidance can create as much friction as the vulnerabilities themselves.

A fourth mistake is assuming local presence automatically means better fit. Local presence can help procurement, meetings, language and onsite execution, but it does not prove stronger application, cloud, API, identity or red-team expertise.

A fifth mistake is comparing companies and platforms as if they are interchangeable. Cyberware and Plainsea demonstrate how automation is changing the market, but a platform-led model should be compared differently from a senior-led manual consultancy.

Enterprise vs SMB Which Type of Penetration Testing Company Do You Need in Bulgaria?

Enterprise buyers usually need more than technical findings. They often need formal scoping, executive-ready reporting, standards language, red-team options, OT/cloud coverage, and coordination across multiple stakeholders. That tends to favor providers such as PwC Bulgaria, DIGITALL, EY or Deloitte on governance and program breadth, while firms such as DeepStrike, SoCyber or LIREX can be attractive when manual application, API and exploit-validation depth are the deciding factors.

SMB and mid-market buyers in Bulgaria usually need tighter scoping discipline. Overbuying a heavyweight firm for a narrow application or infrastructure review can reduce commercial efficiency. BaseLine, Atlant Security, CYBERONE, CyberXperts and SM Tech can make sense where local support and operational continuity matter.

Cross-border execution is acceptable when the provider’s reporting, communication model and modern testing depth are stronger than what is locally available, and when onsite, Bulgarian-language, residency or public-sector requirements are not mandatory.

What Influences Penetration Testing Cost in Bulgaria?

Cost is primarily driven by scope and depth, not by geography alone.

The most important drivers are the number and type of assets in scope, whether the work is web, API, mobile, cloud, internal infrastructure, Active Directory or identity-focused, whether testing is black-box, gray-box or white-box, how much manual validation is required, whether social engineering or red-team elements are included, how complex third-party integrations are, and whether re-testing, attestation or board/audit-ready reporting is part of the deliverable.

Continuous and autonomous models also change buying logic because they price for change velocity and repeated validation rather than a single snapshot in time.

Buyers in Bulgaria should therefore request scope-based proposals and explicitly clarify re-testing, reporting format, tester seniority, evidence handling and onsite needs instead of benchmarking on generic market averages.

FAQs

How much do penetration testing services cost in Bulgaria?

There is no reliable Bulgaria-wide benchmark that should drive procurement on its own. Cost depends on scope, attack-surface type, manual depth, evidence requirements, retesting terms, and whether the model is one-off, continuous, or platform-led.

What is included in enterprise penetration testing?

At minimum, enterprise work should include scope definition, rules of engagement, testing, exploit validation, prioritized findings, remediation guidance, and stakeholder-ready reporting. Depending on need, it may also include red team, social engineering, source-code review, cloud, identity, OT, or re-testing.

Are certifications more important than tools?

Neither alone is enough. Relevant certifications help validate practitioner background, while company-level accreditations provide organizational assurance. Buyers should still confirm who performs the work, how findings are validated, and whether the provider can test business logic and chained exploit paths.

How often should testing be performed, and how long does it take?

Frequency and duration depend on risk and change velocity. Point-in-time engagements can be short when scope is narrow, while high-change SaaS and API environments may justify more frequent or release-driven testing. Regulatory or contractual requirements should be evaluated separately.

Is penetration testing required for GDPR, NIS2, DORA, or PCI DSS?

Not universally. GDPR is risk-based. Bulgaria’s Cybersecurity Act was amended in February 2026 to transpose NIS2 and applies based on entity type, sector and scope. DORA applies to in-scope financial entities and includes digital operational resilience testing. PCI DSS contains more explicit penetration-testing requirements for applicable cardholder-data environments.

Should Bulgaria buyers choose a local provider or a cross-border specialist firm?

Choose by delivery fit, not geography alone. Local firms can simplify governance, language, meetings and onsite execution. Cross-border specialists can be the better choice when manual cloud, API, product-security or exploit-chaining depth is stronger and the engagement does not require confirmed local-office or residency conditions.

Bottom Line

The Bulgaria penetration-testing market is deeper than the original six-company shortlist suggested. Local specialists such as SoCyber, LIREX, AMATAS, CYBERONE, Atlant Security, BaseLine, Cyberware, CyberXperts and SM Tech sit alongside enterprise providers such as PwC Bulgaria, DIGITALL, EY Bulgaria, Deloitte Bulgaria and KPMG Bulgaria, while Plainsea represents the emerging AI-assisted testing-platform segment.

The strongest choice depends on what the buyer actually needs. A cloud-native product team may care most about API, IAM and remediation speed. A bank may prioritize board-ready evidence, DORA/TLPT capability and supplier governance. A Bulgarian SMB may value local communication and practical remediation more than multinational scale.

DeepStrike remains #1 in this publisher ranking for organizations prioritizing manual-first PTaaS, cloud/API attack-path validation, developer collaboration and retesting. Bulgaria buyers with strict local delivery, Bulgarian-language, public-sector, audit-heavy or long-term managed-security requirements may reasonably prefer one of the strong Bulgaria-based providers above.

For buyers searching top penetration testing companies in Bulgaria online, market visibility alone is not enough. The more reliable shortlist comes from a structured comparison of methodology, exploit-validation depth, cloud and API maturity, reporting quality, re-testing terms, and actual delivery fit for Bulgaria-based operations.

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.

Technical Review: DeepStrike Offensive Security Team

Last Reviewed: August 2026