Security

Security audit or penetration test: what is the difference, which to choose?

2 min readUpdated

Both terms come up constantly and are often confused. Yet they answer different questions: an audit asks « where are my weaknesses? », a penetration test asks « can an attacker really use them? ».

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One sentence each

  • A security audit examines your whole system and organisation to list weaknesses, broadly.
  • A penetration test (pentest) simulates a real attack on a defined perimeter to prove which flaws are exploitable, in depth.

Comparison

Security auditPenetration test
Question askedWhere are my weaknesses?Can I really be attacked?
ApproachReview, inventory, configuration, proceduresControlled attack simulation
ScopeBroad: technical and organisationalTargeted: a precise perimeter
ResultPrioritised risk list and action planProven flaws with proof of exploitation
Impact on servicesLowControlled but more sensitive
When?First review, complianceVerify real-world effectiveness of defenses

Which to choose depending on your situation?

  • You have never assessed anything

    Start with an audit: it lays the foundation and reveals simple high-impact fixes.

  • You have fixed things and want to verify

    A pentest will confirm your defenses withstand a real intrusion attempt.

  • You are launching a new site or application

    A pentest targeted at the application before launch avoids nasty surprises.

  • A client or insurer requires it

    Clarify what is requested: audit, pentest or both, and with what scope.

Discover our detailed services: IT security audit and penetration testing.

Frequently asked questions

Does a pentest replace an audit?

No: they are complementary. A pentest only covers a precise perimeter and does not replace the audit's global review.

What budget should I plan?

It depends on scope and depth. After a first call we provide a quote with a precise scope and deliverables.

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