Offensive security, applied

Find out how your systems withstand a real attacker before one finds out for you.

We combine hands-on red team experience with practical, whitebox-first testing to give your team clear, actionable findings instead of a checkbox report.

Schedule a Consultation View Services

What we do

Services built around how attackers actually work

Whitebox Penetration Testing

Full-knowledge assessments of your applications and infrastructure, using source, architecture, and credentials to find what a blackbox test would miss.

Learn more →

Application Security Education

Hands-on training that gives engineering teams the offensive mindset to catch vulnerabilities before they ship.

Learn more →

Threat Modeling & Security Planning

Structured threat modeling and roadmapping that turns 'we think we're secure' into a defensible, prioritized plan.

Learn more →

General Cybersecurity Consulting

Pragmatic advisory for teams that need an experienced security partner without hiring a full-time program lead.

Learn more →

Why Withstand

Built on real-world offense and real-world engineering

Withstand Security is run by practitioners with direct red team experience inside high-stakes environments, including financial institutions, backed by over a decade of hands-on experience building and maintaining enterprise applications across finance, healthcare, and other regulated industries. We know how attackers get in, and we know how the code got that way in the first place. Engagements are scoped and executed the way a real adversary would operate, with findings a development team can actually act on.

Insights