I’m a security engineer at a mid-sized SaaS company. We have tools. SAST. DAST. Dependency scanning. We run them in CI. We get reports. We fix the findings.
But I’m starting to wonder if we’re actually secure. Or just compliant.
Here’s the thing. Automated scanners are good at finding patterns. Known vulnerabilities. Misconfigurations. They’re fast. They’re cheap. They run on every commit. They give you a checklist.
But they don’t find business logic flaws. They don’t find attack chains. They don’t find the stuff that actually gets you breached
Example. We have an API endpoint that lets users export their data. SAST says it’s fine. DAST says it’s fine. No injection. No auth bypass. But what if a user can manipulate the request to export someone else’s data? What if the authorization check is missing on a specific parameter? A scanner won’t catch that. A human will
That’s the gap
I’ve been reading about external AppSec firms. I heard iosentrix emphasizes manual business logic analysis. Not just automated scans. Actual humans. Thinking like attackers. Looking at how the app is supposed to work and finding ways to break the rules
I haven’t used them. I don’t know if it’s worth the money. We already spend a lot on tools. Adding a retainer or a project fee feels like a lot
But I also don’t want to be the guy who said “we have scanners, we’re fine” right before a breach.
Has anyone hired external AppSec on top of their tools? Did it actually find things the scanners missed?