Buyers looking at cybersecurity companies in Ukraine are usually after one of three things: an independent penetration test before a release or audit, a managed detection and response service that watches their environment around the clock, or help getting through ISO 27001, SOC 2, NIS2 or DORA. Ukrainian security teams have spent more than a decade working under sustained, state-level cyber pressure, and that experience shows up in how they test, monitor and respond.
The firms below were selected because security is their core business, not a line item in a long menu of development services. Each one has a stated presence in a named Ukrainian city on its own website, and the descriptions cover what they actually do: offensive testing, SOC operations, incident response, compliance consulting, application security and security products built by Ukrainian R&D teams. If you need a broader technology partner rather than a security specialist, our guide to the Top IT Companies In Ukraine For 2026 covers full-service firms.
We list firms by fit for different buyer needs rather than by size. Read the “Best for” line on each entry to narrow the field quickly.
Cybersecurity Companies In Ukraine At A Glance
Company
Location
Team Size
Best For
UnderDefense
Lviv
120+
24/7 MDR and managed SOC
ISSP
Kyiv
n/a
Incident response and compromise assessment
Iterasec
Lviv
40+
CREST-accredited penetration testing
Hacken
Kyiv
~80
Blockchain security and Web3 compliance
10Guards
Kyiv
n/a
Ethical hacking plus virtual CISO
H-X Technologies
Kyiv
n/a
Compliance programs and OT security
LSG Europe
Kyiv
35+
Mobile and web application security testing
HackControl
Kharkiv
10+
Pentests and phishing simulation for smaller firms
FS Group
Odesa
n/a
Threat intelligence and incident investigation
Betta Security
Kyiv
n/a
Security technology integration
Best Cybersecurity Companies In Ukraine In 2026
1. UnderDefense — Managed Detection And Response With A Lviv Engineering Base
UnderDefense started in 2017 as a penetration testing agency and has grown into a managed security provider with offices in Lviv, Krakow, New York and Jacksonville. Its core offer today is managed detection and response: a 24/7 concierge team that runs or co-manages a client’s SIEM and EDR, investigates alerts and leads incident response, including ransomware cases. The company says it has more than 120 certified security engineers and states a 20 minute SLA for responding to critical alerts.
Alongside the SOC service it sells MAXI, its own platform with modules for AI-assisted SOC work, SOAR, compliance automation and external attack surface monitoring, and it claims more than 100 integrations with existing tools. Offensive work has not gone away: the firm still runs cloud, web application and DORA threat-led penetration tests, plus SOC 2 and ISO 27001 readiness with vCISO support. It is an AWS Partner and lists its services on AWS Marketplace. As a self-reported result, its team placed fourth of 184 teams in Splunk’s Boss of the SOC competition.
Best for: mid-sized companies that want a single provider for round-the-clock monitoring, response and compliance support without building an internal SOC.
2. ISSP — Incident Response And Compromise Assessment From Kyiv
Information Systems Security Partners was founded in 2008 and runs its Ukrainian operation from Kyiv, with country sites for Canada, Georgia, Kazakhstan and Poland as well. ISSP describes itself as a full-cycle cybersecurity company, and its catalog covers red teaming, compromise assessment, penetration testing, cyber hygiene programs and due diligence, plus managed services such as managed detection and response, vulnerability management, and digital forensics with advanced response.
What sets ISSP apart is its investigation work. The firm says it has acted as first responder to five unprecedented cyber attacks and has handled more than 2,000 cases, and its ISSP Labs team is known for cyber attack forensics. Since 2015 it has delivered over 20 technical assistance projects in Ukraine and other European countries, funded by donors including USAID, the US State Department, EU bodies, the World Bank, EBRD and UNDP. The company holds ISO 27001 certification and runs a training center with professional courses, cyber ranges and simulations. It also integrates vendor tools such as Wazuh, CrowdStrike and Netwrix.
Best for: organizations that suspect they have already been breached, and public or critical infrastructure clients that need investigators with deep regional threat knowledge.
Iterasec was founded in 2020 and focuses almost entirely on offensive security and application security consulting. It has an office in Lviv, a registered address in Rzeszów, Poland, and remote teams across Ukraine, Poland and Romania, which gives clients an EU contracting entity with Ukrainian engineers doing much of the work. The company says it has more than 40 specialists and completes over 80 projects a year.
Iterasec holds company-level CREST accreditation, which matters for buyers in regulated sectors that require accredited testers. Its testing menu is broad but stays inside security: web, mobile, API, internal and external network, Active Directory and PCI DSS penetration tests, red teaming, DORA TLPT, and penetration testing of LLM and AI applications. It also covers embedded, firmware and IoT testing, cloud security assessments across AWS, Azure and GCP, container security, threat modeling and secure code review. The firm states plainly that people, not scanners, do the testing. Industries it lists include automotive, fintech, healthcare, IoT and e-commerce.
Best for: product companies and financial firms that need an accredited, manual penetration test with an EU entity on the contract.
4. Hacken — Blockchain Security Audits And Web3 Compliance
Hacken launched in 2017 and has become one of the better known Ukrainian cybersecurity firms in the Web3 space. Kyiv is one of its five listed headquarters locations, alongside New York, Lisbon, Abu Dhabi and Tallinn, and the company says it has around 80 experts. Its homepage reports more than 2,100 public security assessments delivered and nearly 17,000 vulnerabilities found.
The blockchain assurance practice covers smart contract audits, cross-chain bridge reviews, wallet audits, cryptography and infrastructure audits, and Proof of Reserves verification. Outside Web3 it also runs penetration testing, red teaming and AI security audits. HackenProof, its bug bounty platform, gives clients access to a community the company puts at 45,000 researchers, with payment only for verified findings. A third practice handles compliance and advisory work for MiCA, DORA, NIS2, the EU AI Act, ISO 27001, ISO 42001 and SOC 2, plus vCISO services. Hacken itself holds ISO 27001 certification.
Best for: exchanges, protocols and fintech companies that need code audits and regulatory readiness from one provider.
5. 10Guards — Ethical Hacking Paired With Virtual CISO Services
10Guards operates from an office on Ihorivska Street in Kyiv and also has a Cyprus entity in Limassol, which can simplify contracting for EU clients. The firm describes its specialty as ethical hacking combined with business risk consulting, and it organizes its work around three phases: before, during and after a cyberattack.
On the offensive side, 10Guards offers internal and external network penetration testing, web application, mobile application and API security testing, and secure source code review. It also lists deception technology among its professional services. The consulting practice is unusually broad for a firm of this kind: CISO as a service or a virtual security team, cyber risk management, GDPR and ISO 27001 compliance audits, cybersecurity gap analysis, supply chain security, staff awareness training, post-incident recovery and incident forensics. The company says its reports are written to be understood by both technical staff and management, and its site lists team certifications including OSCP, CEH, CISSP, CISM and CREST.
Best for: growing companies that need both testing and someone to own the security program, without hiring a full-time CISO.
6. H-X Technologies — Compliance Programs And Industrial OT Security
H-X Technologies lists its Ukrainian office in Kyiv and a second address in Târgu Mureș, Romania, and says it has legal entities in the EU, Ukraine and the US so clients can contract in their own jurisdiction. Its site states that it has provided information security services to PrivatBank since 2020.
The firm’s range is wide but stays within security. Audit and testing work includes penetration testing, red, blue and purple team exercises, cloud configuration audits, SCADA and OT audits, forensics and smart contract audits. Its compliance practice is one of the deepest in this group, covering ISO 27001, SOC 2, TISAX, PCI DSS, HIPAA and HITRUST, GDPR, NIS2 and the EU Cyber Resilience Act. Implementation services include server hardening, DDoS protection and industrial IT and OT security, and managed services include SOC as a Service, threat detection and response, threat intelligence and virtual CISO support. H-X also runs an academy for awareness programs, phishing simulations and CISSP preparation, and offers DevSecOps and secure software lifecycle work.
Best for: manufacturers, automotive suppliers needing TISAX, and firms preparing for several frameworks at once.
7. LSG Europe — Application Security Testing For Mobile, Web And Cloud
LSG Europe, the European arm of Leviathan Security Group and part of K2 Integrity, is based in Kyiv and says it has more than 35 people on board. It is a focused application security shop, which makes it a good match for software companies that want depth on their own product rather than a broad managed service.
Its mobile application penetration testing audits iOS and Android apps against the OWASP Mobile Security Testing Guide. Web application testing covers the OWASP Top 10 along with authentication and authorization flaws, including OAuth 2.0 implementations, which are a frequent source of serious bugs in SaaS products. The team also performs source code reviews and infrastructure security assessments of cloud deployments on AWS, Google Cloud, Azure and DigitalOcean. One specific service worth noting is Cloud Application Security Assessment (CASA) validation, which app developers often need when their product requests sensitive Google user data. That combination of mobile, web, code and cloud review lets a product team cover most of its attack surface with a single vendor.
Best for: SaaS and mobile app companies that need a thorough product security assessment or CASA validation.
8. HackControl — Penetration Testing And Phishing Simulation With Kharkiv R&D
HackControl was formed by merging two Ukrainian firms, ProtectMaster and HackIT. Its headquarters is now in Kraków, Poland, and it runs its own R&D offices in Kharkiv and Kyiv. The company keeps a small internal team, which it puts at 10 security engineers, and draws on the wider HackIT community of researchers for larger engagements.
Services include penetration testing, phishing simulation, company security audits, smart contract and blockchain audits for Ethereum, EOS and TRON, and digital forensics with incident response. It also offers secure SDLC support, training courses and a brand protection service that handles anti-phishing takedowns on Facebook, Instagram, X, Telegram and WhatsApp, which is useful for consumer brands facing impersonation. HackControl says its work follows OWASP Top 10, OCTAVE, STRIDE and PASTA methodologies, that it has Android and iOS security expertise, and that it reviews new requests within two hours. Engineer certifications listed on its site include OSCP, eWPT, eCPPT, CEH and ISO 27001 Lead Auditor.
Best for: smaller companies and startups that need a fast, practical pentest or phishing test without enterprise overhead.
9. FS Group — Threat Intelligence And Incident Investigation From Odesa
FS Group runs its Ukrainian operation as FS Group Development on Lustdorfska Road in Odesa, with additional offices in London and Pittsburgh. The company says it has more than 11 years on the market and describes its team as shaped by the Russian war against Ukraine in cyberspace. It works with US-based intelligence partner Qintel, which extends the tooling available to clients.
Services include penetration testing, vulnerability scanning, PCI DSS compliance penetration testing and FS IRT, its incident response and investigation unit. The firm reports more than 500 cyber incidents investigated and resolved. It also offers cyber threat analysis, vulnerability assessment and custom security software development. FS Group stands out for its own intelligence products, including Platform Blue, the NGCiso platform, FS TI for threat intelligence and FS OSINT Lab. Team skills listed on the site include AWS, digital forensics, vulnerability management, OSINT and underground intelligence, with certifications such as CISSP, CISA, OSCP, CKA and GIAC GXPN.
Best for: companies that need incident investigation backed by OSINT and threat intelligence, or a PCI DSS penetration test.
10. Betta Security — Security Technology Integration And Support In Kyiv
Betta Security has provided information security services in Ukraine since 2005 and is based in Kyiv, with a registered office on Pyrohovskoho Street and a correspondence office on Valerii Lobanovskyi Avenue. Unlike the testing specialists on this list, Betta is an integrator: it supplies, deploys, tunes and supports security technology inside large enterprise environments.
Its solution areas include infrastructure and network security, IT service security, endpoint protection, data security, fraud protection and threat modeling, with integration into clients’ critical systems. It also provides incident response and technical consulting. The company works with vendors including Palo Alto Networks, Exabeam, Splunk, Forcepoint and Check Point, and says it holds more than 40 international certificates. It reports over 120 completed projects for clients in telecommunications, finance, industry, energy, media, agribusiness and the public sector. For a Ukrainian enterprise rolling out a SIEM, a next-generation firewall estate or data loss prevention, a local integrator with that vendor mix shortens the path from purchase to a working deployment.
Best for: large Ukrainian organizations deploying or consolidating enterprise security platforms.
How Engagements With Ukrainian Security Firms Usually Work
Most security work with Ukrainian providers falls into three engagement types. The first is the fixed-scope project: a penetration test, a code review or a compliance gap assessment with a defined target list, a test window and a report. These are usually quoted per engagement after a short scoping call, and a free retest of fixed findings is a common term worth asking for. If you are still mapping out what kind of test you need, our Penetration Testing hub explains the main test types and how to scope them.
The second is the managed service: MDR, SOC as a Service or vulnerability management billed monthly, often priced by endpoints, log volume or users. Onboarding typically takes a few weeks, because the provider needs to connect to your log sources and tune detections before alerts are useful. The third is the retainer or advisory model, such as a virtual CISO, an incident response retainer or a continuous testing subscription. Retainers make sense when you expect recurring audits, frequent releases or a regulator asking for evidence on a schedule.
How To Choose A Cybersecurity Company In Ukraine
Is Security Their Core Business?
Many Ukrainian software houses list penetration testing among dozens of services. That can work for a light check, but for an audit, a regulated release or an incident you want a firm whose staff, tooling and revenue depend on security. Ask what share of the team works on security full time, how many security projects they ran last year, and whether testers are separate from any developers who built the product. If you need development capacity as well, it is usually cleaner to hire a builder from our Top Software Development Companies In Ukraine guide and a separate security firm to test their work.
Which Certifications And Accreditations Matter For Your Case?
Individual certifications such as OSCP, OSEP, CRTO or Burp Suite Certified Practitioner show hands-on offensive skill, while CISSP, CISA and CISM point to governance and audit strength. Company-level credentials are different: CREST accreditation is required by some banks and regulators for penetration testing, and a provider’s own ISO 27001 certification tells you it handles your data under an audited management system. Match the credential to what your auditor, customer or regulator will actually ask for.
Can They Show A Sample Report?
The report is the deliverable you keep. Ask for a redacted sample and check that each finding has clear reproduction steps, a realistic severity rating, business impact in plain language and specific remediation advice. A good report also separates confirmed, manually validated findings from scanner output. If a firm cannot share a sample, ask to see the report template and an anonymized executive summary.
How Do They Handle Business Continuity?
Ukrainian security firms have run their operations through power outages and wartime disruption since 2022, and most have adapted in practical ways. Ask how the team is distributed across cities and countries, what backup power and connectivity they use (generators, battery systems, satellite and multiple internet providers are common), and who covers a 24/7 service if one location goes offline. Many providers also contract through an EU or US entity, which several firms on this list do from Poland, Cyprus, Romania or Estonia. Our comparison of Poland, Ukraine and Romania for nearshore work covers these trade-offs in more detail.
Do They Understand Your Compliance Framework?
Frameworks differ in what evidence they need. SOC 2 auditors look for operating controls over time, ISO 27001 needs a functioning management system, DORA brings threat-led penetration testing for financial entities, and TISAX applies to the automotive supply chain. Ask the provider which audits their clients have passed with their help and whether they work alongside your external auditor or simply hand over templates.
Frequently Asked Questions
Why Hire A Cybersecurity Company In Ukraine?
Ukrainian security teams combine strong technical education with years of direct exposure to state-sponsored attacks, ransomware and large-scale incident response. Many have grown up around local communities such as OWASP chapters and capture-the-flag competitions. Rates are generally lower than in Western Europe or the US for comparable skill, and many firms contract through EU entities, which simplifies data protection and procurement.
How Long Does Penetration Testing In Ukraine Usually Take?
A focused web application or API test typically takes one to three weeks from kickoff to report, depending on the number of roles, endpoints and integrations. Network and Active Directory tests are often similar in length, while red team exercises and threat-led tests for DORA can run for several weeks or months. Scoping, access setup and retesting add time on either side, so plan for that in release schedules.
Is It Safe To Give A Ukrainian Firm Access To Our Systems?
The same controls apply as with any security vendor. Sign an NDA and a data processing agreement, define the rules of engagement in writing, use time-limited test accounts, and ask how test data and reports are stored and deleted. A provider that holds ISO 27001 certification or contracts through an EU entity gives you an extra layer of assurance on data handling.
Do Ukrainian Cybersecurity Firms Offer 24/7 Monitoring?
Yes. Several firms on this list run SOC or MDR services around the clock, typically by spreading analysts across time zones and locations so that coverage does not depend on one office. Ask for the response time commitment on critical alerts, what actions the provider can take on your behalf (such as isolating a host), and how escalation to your own team works.
Conclusion
Ukraine’s security sector covers the full range a buyer is likely to need, from accredited penetration testing and application security reviews to managed SOC services, incident investigation, compliance programs and home-grown security products. The right choice depends less on size than on fit: match the provider’s specialty to your problem, check the credentials your auditors expect, and ask how they keep services running through disruption.
Start with two or three firms whose “Best for” line matches your need, ask each for a sample report and a scoping call, and compare how clearly they explain risk in business terms.
Bookmark this guide, as we update it when firms change their services or locations.
If you want to feature your company on this list, email us or submit a form in the Top Choices section. After a thorough assessment, we’ll decide whether it’s a valuable addition.
