Find a pentest company with GXPN
33 companies have this certification
GIAC Exploit Researcher and Advanced Penetration Tester (GXPN)
The GXPN certification was created by the Global Information Assurance Certification (GIAC), which is part of the SANS Institute, a leading organization in cybersecurity training and certification. Introduced in 2011, the GXPN was developed to validate advanced penetration testing skills and the ability to conduct sophisticated security assessments. It was designed to address the growing need for professionals who could go beyond basic vulnerability assessments and perform complex exploit development and advanced attack simulations.
The GXPN is highly valued in the cybersecurity industry because it demonstrates expertise in advanced exploitation techniques, including reverse engineering, exploit development, and sophisticated penetration testing methodologies. This certification is particularly respected among offensive security professionals, red teams, and organizations that require rigorous security testing of their systems. Holding a GXPN credential signals to employers that a professional possesses the technical depth to identify complex vulnerabilities and can think like an advanced adversary, making it one of the more prestigious certifications for senior-level penetration testers and security researchers.
RedSeer Security
Cybersecurity company specializing in offensive security, red teaming, penetration testing, and social engineering; 13 employees with 7.1% YoY growth; founded 2018; based in Doral, Florida, USA; provides bespoke cybersecurity solutions with over two decades of expertise, focusing on safeguarding digital assets against sophisticated threats.
NDAY Security
Cybersecurity company specializing in offensive security and threat exposure management; founded 2023, 2 employees with 25% YoY growth, headquartered in Miami, Florida, USA; provides a comprehensive CTEM platform for cybersecurity defenses and attack surface management.
FRSecure
Information security consulting company specializing in cybersecurity, penetration testing, and risk management; 86 employees with 6.5% YoY growth, $17.5M revenue; based in Edina, Minnesota, founded in 2008.
LIFARS
Cybersecurity firm providing Incident Response, Digital Forensics, Penetration Testing, Ransomware Mitigation, and Cyber Resiliency Services; headquartered in New York, NY, United States; offers penetration testing services.
Stratascale
Cybersecurity and managed cybersecurity services provider based in Charlotte, NC; offers penetration testing, red team exercises, and offensive security testing as core services; HQ in Charlotte, NC, United States.
PEN Consultants, LLC
Cybersecurity company specializing in penetration testing, ethical hacking, and red teaming; 5 employees, founded 2013, headquartered in San Antonio, Texas • Provides comprehensive vulnerability assessments and security testing services to identify threats before exploitation.
3L337 Consulting, LLC
Cybersecurity company specializing in penetration testing, red team exercises, and security consulting; based in Denison, Texas, with 2 employees, founded in 2022, focusing on offensive security and network vulnerability assessments.
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Wiresolve
Cybersecurity firm specializing in offensive security and penetration testing; based in San Antonio, Texas, with a focus on red team services and incident response.
Yemane Services LLC
Cybersecurity consulting firm based in Fairfax, Virginia, specializing in penetration testing, digital forensics, incident response, vulnerability assessments, breach assessments, and security engineering; known for experienced cybersecurity consultants and broad security expertise.
B-sec Better Secure Gmbh & Co Kg
Cybersecurity service provider based in Austria; specializes in penetration testing, security assessments, and IoT security analysis with a comprehensive suite of pentest services including network, web, IoT, social engineering, physical, red team, and vulnerability assessments • Located at Hauptplatz 16, 7374 Weingraben, Austria; GmbH & Co KG
xameco
Belgium-based cybersecurity consulting firm specializing in security assessments, incident handling, and penetration testing (Red Team); located in Chastre-Villeroux-Blanmont, with a focus on protecting assets and improving security posture.
ADO Security
Cybersecurity company specializing in awareness, defensive, and offensive security services; 14 employees; founded 2025; headquartered in Copenhagen, Denmark; offers penetration testing, vulnerability scanning, and cybersecurity awareness training.
DBM Partners
Cybersecurity consulting firm based in Paris, France, specializing in penetration testing and red team exercises; 22 employees, founded in 2012, with a focus on cybersecurity audits, compliance, and cyber projects.
bugshell
Cybersecurity company specializing in penetration testing and security services; founded in 2021, 6 employees (+16.7% YoY growth), headquartered in Berlin, Germany. Offers a European penetration testing platform with services including security seals, phishing, consulting, and training.
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MottaSec
Cybersecurity firm specializing in penetration testing, cybersecurity consulting, and bespoke security solutions; founded in 2022, with 2 employees and +150% YoY growth; based in Dafni, Greece, with expertise in ICS/OT pentesting, red/purple teaming, and ISO 27001.
Secure Network
Cybersecurity company specializing in application security, cloud & infrastructure security, and penetration testing; 27 employees, $4.4M revenue, founded 2004 in Milan, Italy; offers services including pentest, social engineering, and cybersecurity governance, with certifications for embedded device analysis.
ThreatLabs
ThreatLabs is a private IT services and consulting firm specializing in security assessments and penetration testing; with 3 employees (+50% YoY growth), founded in 2023, headquartered in Utrecht, Netherlands. The company provides vulnerability assessments, security testing, and consultancy services, with dedicated offerings for penetration testing and security evaluations.
ThreatLabs
Dutch cybersecurity firm ThreatLabs, headquartered in Utrecht, Netherlands, specializes in security assessments including penetration testing and vulnerability evaluations; they offer dedicated pentest services for applications, PCI DSS, and perform active testing phases like exploitation.
EHGI B.V.
Netherlands-based cybersecurity firm specializing in penetration testing and red teaming; actively conducts realistic attack simulations for medium and large organizations; registered in the Netherlands (KvK: 94674922) with an Amsterdam address at Papaverweg 34, 1032 KJ.
Redteam.pl
Poland-based cybersecurity firm specializing in penetration testing and red teaming; 20+ years of experience; headquartered in Warsaw, Poland with official registration (KRS 0000718490, REGON 369466623, NIP 5252739138).
SEQRED
Cybersecurity services provider based in Poland; specializes in IoT and ICS security, offering offensive and defensive solutions including cloud security, threat intelligence, and security testing. 11 employees with -22.2% YoY growth; active penetration testing provider with services and roles dedicated to pentest activities.
Red Teaming
Cybersecurity firm based in Warsaw, Poland, specializing in penetration testing and red teaming; offers advanced cyberattack simulation services to evaluate organizational security posture and resilience.
Cyber Threat Defense
Cyber Threat Defense is a private cybersecurity firm specializing in penetration testing and vulnerability assessments; 24 employees with a 2.4% monthly decline and 18.4% YoY decrease, founded in 2017 and based in Cluj-Napoca, Romania. The company emphasizes providing clients with confidence and stability in cybersecurity through its expertise in information security.
Istrosec
Cybersecurity company headquartered in Petržalka, Bratislava, Slovakia; provides threat intelligence, incident response, and cyber advisory services; offers penetration testing (ethical hacking); ISO/IEC 27001:2013 certified and TI accredited.
Simovits Consulting
Cybersecurity consulting firm specializing in information and IT security; provides penetration testing, security reviews, vulnerability scans, and incident management with a focus on long-term client relationships. Founded in 1997, based in Stockholm, Sweden, with 14 employees and +5.3% YoY growth; known for adherence to industry standards like NIST SP800-115 and OWASP.
Exploit Security
Cybersecurity consultancy specializing in penetration testing, embedded systems, and IoT security; 2 employees; based in Sydney, Australia; focuses on hardware and application vulnerability assessments, zero-day exploits, and security research.
SilentGrid Security
Australian cybersecurity consultancy specializing in adversary simulation and penetration testing; 14 employees with 16.7% YoY growth; headquartered in Sydney, with over 10 years of experience in offensive security services.
Packetlabs
Packetlabs is a Canadian-based private cybersecurity firm specializing in penetration testing; 43 employees, founded in 2011, headquartered in Mississauga, Ontario. It is CREST-accredited and SOC 2 Type II attested, delivering impact-first security assessments with no outsourcing or false positives. The company has a strong web presence with 45,956 monthly visits and ranks #718,442 globally.
Vumetric by TELUS
Vumetric by TELUS is a private cybersecurity company specializing in penetration testing and security audits; founded in 2007 with 16 employees and a -36.4% YoY growth. Based in Montréal, Canada, it offers services including external, internal, web application, and medical device penetration testing, as well as cloud security and SCADA cybersecurity assessments. The company has 16,557 monthly website visits and a global rank of #1,615,415, competing in the cybersecurity market with firms like simventions, nou systems, and lhp engineering solutions.
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iSystems Security Ltd
Cybersecurity company based in Hong Kong; specializes in security risk assessment, audits, and penetration testing with a team of 3 employees; founded in 2010; offers services including penetration testing, cyber incident response, and privacy impact assessments.
Secure D Global
Cybersecurity company specializing in security assessment, penetration testing, incident response, and compliance; 37 employees with 20.5% YoY growth; founded in 2018; headquartered in Bangkok, Thailand; operates across Southeast Asia with offices in Kuala Lumpur and Bangkok.
Datafarm Co., Ltd.
Thailand-based IT services and consulting company specializing in cybersecurity; 33 employees with 14.6% YoY growth; offers penetration testing, vulnerability assessment, and cybersecurity compliance services; ranked #6,849,479 globally and #96,421 in Thailand; active in cybersecurity, penetration testing, and IT security.
KSO Solutions
KSO Solutions is a Malaysia-based cybersecurity consultancy specializing in penetration testing and offensive cyber engagements; veteran owned and offering world-class services at competitive prices.