We run an e-commerce site selling specialized industrial parts with an annual volume of around 12 million TL. Our infrastructure runs on open-source software with custom developments made by our in-house developer. Last week a cybersecurity firm called us and pitched a security assessment for our website.
We asked for a quote and they gave us two separate options: the first is a vulnerability scan for 12,000 TL, and the second is a web penetration test for 55,000 TL. I couldn't really grasp the reason for this more than fourfold difference. Don't both of them find vulnerabilities anyway?
We are an SME, and our goal is to see our basic security risks without burning through unnecessary budget. What exactly is a vulnerability scan, would it be enough on its own for a business like ours, or do we definitely need to get a penetration test?