We STEAL ALIEN Technology

A company that researches attacksand builds the defense

STEALIEN's white-hat hackers analyze vulnerabilities from the attacker's perspective and feed the results into our security solutions and consulting.

Proven offensive research capabilities that raise our clients' security level

We have consistently placed at world-class hacking competitions such as DEFCON, CODEGATE, and Google CTF. We continuously discover vulnerabilities with high CVSS severity or confirmed real-world exploitability and report them to global organizations and companies including Microsoft, Google, NASA, Apache, and Synology. These offensive and vulnerability research achievements feed into advanced security R&D, solution enhancement, and security consulting.

Mobile App · Web Security Solutions Designed by White-Hat Hackers

Our in-house solutions, built on real penetration experience, protect your apps and web services from threats.

MOBILE APP SECURITY

AppSuit

  • Mobile app code obfuscation and integrity protection
  • Anti-reverse engineering
  • Real-time tampering detection
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WEB SECURITY

WebSuit

  • AI-driven behavioral web security
  • Web application source protection
  • Automatic vulnerability detection and defense
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Real-World Security Assessment from the Attacker's Perspective

From hands-on security services to AI security, Cyber R&D, and training — we deliver attacker's-perspective expertise.

AI-Powered Pentesting & AI Security Validation

From AI-driven vulnerability analysis to red teaming for generative AI services — attacker's-perspective security validation built for the AI era.

Advanced Security Research & Training

We develop next-generation security technology grounded in offensive research and provide the hands-on training platforms Cyber Drill System and Cyber Range.

Customers Who Trust STEALIEN

Financial institutions, public agencies, and global enterprises trust the proven technology behind STEALIEN's security solutions and services. Our expertise is also recognized in global markets across the US, Europe, Japan, and Southeast Asia.

Experience attacker's-perspective security expertise

From product adoption to security services and technical inquiries, we propose the best-fit approach for your environment.