Web Application Penetration Testing
Manual, OWASP-aligned assessment of your web application from every angle — external exposure, internal credentialed access, API security, and underlying infrastructure.
Get a Quote →Why manual web app testing matters
Automated scanning tools are a starting point, not a security program. They miss business logic vulnerabilities, authentication flaws, complex injection paths, and the creative attack chains that real adversaries exploit. Our AppSec engineers conduct hands-on assessments that go beyond what any scanner can find.
Functionality and speed are almost always the primary concern in development, leaving security as an afterthought. That's not a criticism. It's reality. Our role is to bridge that gap safely and constructively, giving your development team a clear roadmap to a secure application.
Testing approach
- OWASP-aligned methodology: Built around the Open Web Application Security Project testing guide — the definitive framework for web application assessments.
- Unauthenticated (external) testing: Assessing your public-facing application as an outside attacker with no credentials.
- Authenticated (credentialed) testing: Testing internal functionality, role-based access controls, and data exposure from within the application.
- API penetration testing: Assessing REST, SOAP, and GraphQL API endpoints for authentication, authorization, and injection vulnerabilities.
- Code & infrastructure review: Examining back-end architecture, hosting configuration, and code-level security patterns where in scope.
Delivered as a partner, not an auditor
We work with your development team, not against them. Our findings are delivered with context: why it matters, how it can be exploited, and precisely how to fix it. Just as a CFO relies on a CPA firm for an independent audit, an independent security review from Grid32 provides the insight and credibility your stakeholders trust.
Based in New York. Serving Clients Nationwide.
Grid32 provides web application penetration testing for organizations across the United States. Our engineers are based in the New York metro area but deliver every web application engagement remotely. No geographic constraints, no travel required. We work extensively with SaaS companies, fintech firms, law firms, and healthcare organizations, many of whom have compliance obligations under NYDFS, SOC 2, PCI DSS, or HIPAA that require independent application security testing.