A vulnerability scan is an automated tool that lists known weaknesses across systems, while a penetration test is a manual engagement where a human actively exploits weaknesses to prove real-world impact. Scans give breadth and run continuously; pen tests give depth and validation. Most mature security programs use both.
Think of the scan as a smoke detector and the pen test as a fire drill. The scan tells you where the risk likely is, cheaply and often. The pen test confirms what an attacker could actually do with it.
Compliance language sometimes blurs the two, so read requirements carefully. PCI DSS, for example, mandates both regular scanning and an annual penetration test, and they are not interchangeable.
traztech delivers scoping the right security testing for startups and growth-stage companies, led by a published CVE researcher.
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