Security Testing That Closes Gaps Before Attackers Find Them
Our certified security engineers conduct thorough SAST, DAST, and penetration testing to harden your application against modern threats.
Why Security Testing
What you'll get
OWASP-aligned penetration testing and vulnerability assessments that protect your application and your users' data.
Comprehensive coverage
Thorough testing across all critical paths and edge cases.
Expert team
Experienced QA professionals dedicated to your success.
Actionable insights
Clear reports with prioritized recommendations.
Our Process
See how we work
A proven methodology that delivers results at every stage.
Step 1 of 3
Assessment
- Define scope and identify critical assets
- Map attack surface and potential threat vectors
- Select appropriate testing methodology (OWASP, PTES)
- Establish rules of engagement and testing boundaries
"TestDel transformed how we think about quality. We went from dreading release day to looking forward to it. Their embedded team caught issues we'd been blind to for years, and built the automation backbone that lets us ship with confidence every sprint."
FAQ
Common questions about security testing
Can't find what you're looking for? We're here to help.
Ask us anythingVulnerability scanning is automated: it checks your application against databases of known vulnerabilities and produces a list of findings. Penetration testing is manual and intelligence-led: a certified engineer attempts to breach your application using the techniques a real attacker would use, chaining vulnerabilities and exploiting business logic in ways no automated tool can replicate. For organisations handling sensitive data or seeking compliance evidence, penetration testing is necessary; vulnerability scanning alone is insufficient.
A focused web application penetration test typically takes 3–5 days of testing, with a further 2–3 days for report writing and review. More complex assessments covering APIs, mobile applications, and infrastructure take longer. We scope each engagement based on the application's attack surface and your specific objectives.
Yes. Our penetration testing reports include detailed remediation guidance for each finding, prioritised by severity (Critical, High, Medium, Low, Informational). We also offer a free retest of critical and high findings following remediation to confirm resolution, something many security firms charge separately for.
For most organisations, annual penetration testing is the minimum, with additional testing after major releases, architecture changes, authentication changes, or newly exposed APIs. Regulated environments such as PCI DSS, SOC 2, and ISO 27001 programmes often expect evidence of regular assessment and remediation, not a one-off report. We help define a testing cadence that matches your risk profile, customer commitments, and compliance obligations.
A typical scope covers authenticated and unauthenticated testing of the web application, core user roles, key business workflows, session management, access control, input handling, and supporting APIs. Where relevant, we also review mobile endpoints, third-party integrations, cloud configuration touchpoints, and privileged functions that create outsized risk. Clear scoping matters because a credible test should reflect your real attack surface, not just the easiest screens to scan.
They solve different problems. SAST reviews source code and build artefacts to find insecure coding patterns early, while DAST evaluates a running application to expose exploitable behaviour in the deployed environment. Most mature security programmes use both because that combination reduces blind spots and catches issues before and after deployment.
We escalate critical findings quickly, usually the same day, so your team can make immediate risk decisions rather than waiting for the final report. Each issue is documented with business impact, proof of exploitability, affected assets, and clear remediation guidance so engineering teams can act without ambiguity. If needed, we also support prioritisation discussions with security, engineering, and leadership stakeholders.
Yes. Once your team has remediated the agreed findings, we perform a focused retest to confirm whether the vulnerability is fully resolved and whether any residual risk remains. We then issue updated evidence that procurement teams, auditors, or enterprise customers can use with confidence.
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Let's discuss your requirements and create a tailored solution for your team.