Security testing for
what teams build next.
HackStack Security helps global product and technology teams uncover exploitable risk across applications, cloud, AI systems, and connected infrastructure.
One partner.
Every layer.
From launch readiness to enterprise resilience, our teams bring the specialist capability needed to understand and reduce your real attack surface.
AI & LLM Security
Expert-led security testing for AI-enabled applications, LLM workflows, copilots, agents, retrieval systems, and the APIs that connect them.
AI Red Teaming
Scenario-driven adversarial testing that evaluates how AI systems respond to misuse, manipulation, data exposure, unsafe actions, and control bypass attempts.
Web App Security
Expert-led web application penetration testing that uncovers business logic failures, access control weaknesses, and exploitable risk beyond automated scanning.
API Security
Deep testing for REST, GraphQL, SOAP, and internal APIs, focused on authorization, data exposure, abuse paths, and real-world attacker behavior.
Cloud Security
Architecture and configuration reviews that identify excessive access, exposed services, weak guardrails, and high-impact cloud attack paths.
Red Teaming
Goal-driven attack simulation that tests people, process, and technology against realistic adversary behavior without unnecessary disruption.
Findings your team
can use.
We do not stop at identifying vulnerabilities. We make the risk understandable, the remediation practical, and the result defensible.
Practical findings
Every issue is validated, contextualized, and connected to a realistic attack path.
Business-focused reporting
Leaders get a clear risk narrative, not a wall of scanner output.
Developer-friendly remediation
Engineering teams receive precise guidance they can implement confidently.
Scoped. Tested. Verified.
Our process is designed to create clear decisions, useful evidence, and lasting security improvement.
Define
Agree scope, objectives, rules of engagement, and the decisions the assessment must support.
Test
Map the attack surface and combine structured coverage with expert-led analysis.
Explain
Deliver validated findings, business context, and developer-ready remediation.
Verify
Support fixes, retest remediation, and document final risk status.
Evidence your team can use.
OWASP, ASVS, MASVS, NIST, CIS, and ISO 27001 support our coverage. Clear reporting turns that coverage into action.
Collaborate with a team that can go direct or embedded.
Use us for client work, partner delivery, procurement support, or public references once you are ready to publish them.
Work directly with your security, engineering, product, or executive team on a scoped review or ongoing advisory engagement.
- Security review scoping
- Findings briefing and retest
- Clear remediation support
Embed us into your delivery flow when you need specialist security testing without adding a new permanent team.
- White-label collaboration
- Embedded reporting format
- Aligned delivery cadence
Help buyers, procurement teams, and vendor managers collect the security evidence they need to move a deal forward.
- Questionnaire support
- Security pack preparation
- NDA-friendly communication
Add approved client names or logos only when permission is in place. Keep a single editable list so updates stay simple later.
- Single source of truth
- Logo or text display
- Show only approved references
Security thinking
for builders.
Practical research and guidance from the people who test, review, and strengthen technology every day.
AI Red Teaming Checklist for LLM Applications
A practical checklist for testing prompts, data, tools, agents, and guardrails.
Read insight ↗How to Choose a Penetration Testing Partner
Questions global teams should ask before trusting a security assessment.
Read insight ↗Ready to test what matters before attackers do?
Tell us what you are building, changing, or concerned about. We will help you define the right security review.