Offensive security · Certified testers

Penetration testing that
thinks like a real attacker.

We don't just run a scanner. Our certified testers manually exploit your web apps, networks, APIs and cloud the way a real attacker would — then hand you a clear, prioritised roadmap to fix what matters.

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What is penetration testing?

A penetration test (or “pentest”) is an authorised, simulated cyberattack against your systems. The goal is to find and safely exploit vulnerabilities before a malicious attacker does — proving not just that a weakness exists, but how far an attacker could actually get with it.

Unlike an automated scan, a penetration test is driven by people. Our testers chain together flaws, escalate privileges, pivot across your network and reach the data or systems that matter — exactly as an adversary would. The result is a realistic picture of your true exposure, not a list of theoretical issues.

Not sure whether you need a pentest or a vulnerability assessment? We explain the difference in this guide — or jump straight to our vulnerability assessment service.

What we test

🌐 Web applications

OWASP Top 10 and beyond: authentication, access control, injection, business-logic flaws, SSRF, session management and API abuse on your web platforms.

🔌 APIs & microservices

REST, GraphQL and microservice testing — broken object-level authorisation, token handling, rate limiting and data exposure across service boundaries.

🖥️ Internal & external networks

Perimeter and internal network testing: exposed services, misconfigurations, lateral movement, privilege escalation and Active Directory attack paths.

☁️ Cloud environments

AWS, GCP and OVHcloud configuration and identity review combined with active exploitation of exposed resources, over-permissive roles and metadata abuse.

📱 Mobile & thick clients

Android/iOS and desktop application testing: insecure storage, traffic interception, hardcoded secrets and backend API weaknesses.

🎯 Social engineering

Optional phishing and pretexting campaigns to test the human layer and your detection/response — measured, ethical and fully scoped.

How a Webristle pentest works

Scoping & rules of engagement

We agree targets, depth (black/grey/white-box), timing and safety boundaries in writing before anything starts.

Testing & exploitation

Manual testing backed by tooling: we find, verify and safely exploit vulnerabilities, capturing evidence at every step.

Report & roadmap

A clear report with an executive summary, technical detail, proof-of-concept and a risk-prioritised remediation roadmap.

Remediation & retest

We support your fixes and re-test to confirm each issue is genuinely closed — and issue an attestation you can share.

What you get

An executive summary for management and a detailed technical report for your engineers.
Every finding rated by real business risk (CVSS + context), with reproducible proof-of-concept.
A prioritised, step-by-step remediation roadmap — what to fix first and why.
A free retest of remediated findings and a clean-up attestation letter.
Evidence suitable for NIS2, ISO 27001, SOC 2 and client security questionnaires.

Penetration testing — FAQ

How is a penetration test different from a vulnerability assessment?+

A vulnerability assessment finds and lists weaknesses (breadth); a penetration test actively exploits them to prove real-world impact (depth). Most organisations start with a vulnerability assessment and use penetration testing on critical systems. We cover both — see our comparison guide for details.

How long does a penetration test take?+

A focused web-app or external network test typically runs 5–10 working days including reporting. Larger or multi-target engagements are scoped individually. You receive the report within a few days of testing completion.

Will the test disrupt our production systems?+

No. We agree rules of engagement up front, test destructive actions only with explicit permission, and can work against staging or in low-traffic windows. Safety and availability are part of the scope.

Do you just run automated tools?+

No. Tools help with coverage, but every finding is manually verified and the real value — chaining flaws, business-logic abuse, privilege escalation — comes from hands-on testing by our certified testers.

Does a penetration test help with NIS2 or ISO 27001?+

Yes. Penetration testing is expected evidence for NIS2 Article 21 security testing, ISO 27001 and SOC 2. Our report is structured to serve as audit evidence.

Do you retest after we fix the issues?+

Yes. Retesting of remediated findings is included, and we issue an attestation confirming the fixes so you can share it with clients or auditors.

Find your weaknesses before attackers do.

Get a scoped penetration test from certified testers, with a clear roadmap and free retest. Free consultation, response within 48h.