Audit vs pentest: what is the difference?
The two terms are often confused, but they answer different and complementary questions.
The cybersecurity audit takes a broad, methodical view: it assesses system configuration, processes, governance and compliance with a framework (ISO 27001, ANSSI, CIS). It aims for completeness and coverage.
The penetration test takes the attacker's perspective: it actually attempts to exploit the flaws to demonstrate concrete impact (access to data, server takeover, privilege escalation). It aims for depth and proof.
When to choose one or the other?
- Audit: to establish a complete state of play, prepare a certification or prioritise your security investments.
- Pentest: to validate the real robustness of an application, infrastructure or SaaS before going live or at a client’s request.
- Ideally both: the audit frames the scope, the pentest validates the critical points.
The cybersecurity audit
The audit objectively measures your maturity level and identifies gaps against best practices. It can be technical (configurations, hardening, exposure), organisational (policies, processes, governance) or framework-focused (ISO 27001 gap analysis).
What an audit typically covers
- Inventory and classification of critical assets
- Review of configurations and hardening (systems, network, Cloud)
- Management of access, identities and privileged accounts
- External exposure and attack surface
- Security policies, procedures and governance
- Risk analysis and compliance with the target framework
The deliverables
A clear report ranking findings by risk level, readable by both technical teams and management, with an action plan prioritised by impact / effort ratio.
The penetration test (pentest)
The pentest simulates a real attack, in an authorised and controlled setting, to measure the actual resistance of your defences. Unlike a simple vulnerability scan, it demonstrates concrete exploitation and its business impact.
The approaches: black, grey, white box
- Black box: the tester has no prior information, like an external attacker.
- Grey box: the tester has limited access (a user account, for example) — the best coverage / cost ratio.
- White box: the tester has access to code, configurations and architecture, for maximum coverage.
The scopes tested
- Web applications and APIs (OWASP Top 10, business logic)
- SaaS and multi-tenant applications (data isolation between clients)
- External infrastructure (Internet exposure) and internal (lateral movement)
- Cloud environments (AWS, Azure, GCP) and containers
- Social engineering and phishing (on request)
My pentest methodology
We follow a structured approach aligned with recognised standards (OWASP, PTES, MITRE ATT&CK):
- Scoping: defining the scope, objectives, rules of engagement and testing windows
- Reconnaissance: gathering information and mapping the attack surface
- Vulnerability identification: scanning and in-depth manual analysis
- Exploitation: controlled demonstration of the real impact of flaws
- Post-exploitation: assessing the reach (data access, escalation, persistence)
- Report: prioritised findings (CVSS), evidence, and remediation recommendations
- Re-test: verifying the effective correction of critical flaws
Pentest for SMBs, startups and SaaS
SMBs and SaaS vendors are prime targets: exposed attack surface, sensitive client data, and growing contractual requirements. More and more enterprise clients require a recent pentest before signing.
We adapt the scope and effort to your context and budget, focusing on what really matters: the data and functions critical to your business. For a SaaS, data isolation between clients (multi-tenant) receives particular attention.
My support
Beyond the report, I support you in prioritising and fixing the flaws, and can re-test to confirm remediation. As an outsourced CISO, I can also embed audit and pentest in a continuous security approach rather than a one-off exercise.