MDSec
Consultancy / pentestAdversary simulation, red team operations and application security testing.
GB
Categories · Market focus
Offensive security companies
Explore offensive security companies offering adversarial assessments, red teaming and penetration testing. Review each provider’s scope before building your shortlist.
Also browse Pentesting companies — the same company set under a related category.
229 companies. Refine by location, capabilities, or team size to find the right fit.
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Mundji CyberSecurity
Consultancy / pentestPenetration testing, bug bounty programmes and offensive security services.
AO
National Cyber Security Company
Consultancy / pentestPenetration testing, industrial security assessments and offensive security services.
PS
NCC Group
Consultancy / pentestGlobal pentest, research, and cyber resilience consultancy.
Manchester, GB· 1000+ people
Nethemba
Consultancy / pentestPenetration testing and security audits.
Bratislava, SK
NetSPI
Consultancy / pentestPenetration testing, attack simulation and proactive security assessments.
US
Next Byte
Consultancy / pentestPenetration testing, vulnerability assessments and information security audits.
RW
Nitro Team
Consultancy / pentestPenetration testing, incident response and security architecture services.
KZ
NonaSec
Consultancy / pentestSecurity and compliance assessments, penetration testing and virtual CISO services.
Orlando, US· 2–9 employees (reported) people
Nordic Defender
MSSP / managedManaged security operations and offensive security.
Stockholm, SE
North IT
Consultancy / pentestWeb, mobile and API penetration testing, secure code audits and network security testing.
Middlesbrough, GB· 2–9 employees (reported) people
NSU Secure Solutions
Consultancy / pentestPenetration testing, compliance consulting and incident response services.
Chennai, IN· 2–9 employees (reported) people
NullStrike Security
Consultancy / pentestPenetration testing for cloud infrastructure, web applications, APIs and AI systems.
Kharsan, IN· 2–9 employees (reported) people
Obsentry
MSSP / managedPenetration testing, vulnerability assessments and security monitoring.
Malden, US· 2–9 employees (reported) people
Oneconsult
Consultancy / pentestPenetration testing and incident response.
Zürich, CH
OniDef
Consultancy / pentestPenetration testing, compliance audits, vulnerability assessments and incident response.
Warszawa, PL· 2–9 employees (reported) people
Orobi
MSSP / managedManaged security monitoring, phishing training, penetration testing and compliance support.
San Antonio, US· 2–9 employees (reported) people
Pentera
Product vendorAutomated adversarial testing and exploitability validation.
US
Pentest
Consultancy / pentestPenetration testing and vulnerability assessments for business systems.
Lisboa, PT· 2–9 employees (reported) people
Pentest Experts
Consultancy / pentestPenetration testing, incident response and security awareness training.
Kladno, CZ· 2–9 employees (reported) people
Pentest Factory
Consultancy / pentestPenetration testing, workstation security assessments and phishing simulations.
Geldern, DE· 2–9 employees (reported) people
Pentest King
Consultancy / pentestPenetration testing for security and compliance assessments.
Dover, US· 2–9 employees (reported) people
Pentest Ltd
Consultancy / pentestManual penetration testing and adversary simulation for infrastructure, applications and cloud environments.
GB
Pentest-Tools.com
Product vendorOnline penetration testing and vulnerability scanning tools.
Bucharest, RO
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