A sensible order is secrets scanning and SCA first, container and IaC scanning next, SAST after that, and CSPM once you have cloud accounts that people can change by hand. The logic is simple: start with the tools that give clear, fixable findings at low noise, and add the noisy ones when someone can own tuning.
Quarter 1: the cheap, clear wins
Secrets scanning. A leaked credential is a direct way in, the finding is binary, and the fix is to rotate. Scan history once, then scan every push. Expect a few old leaks the first time.
SCA. You get an inventory of components and a list of known vulnerable ones. It also prepares you for customer questions about what you ship. Fix a small number of high severity items, and set a rule that new ones cannot merge.
Quarter 2: the build and deploy path
Container scanning, if you ship images. Scan at build and again in the registry. Pick a base image policy at the same time, because most findings come from the base.
IaC scanning. Add it to pull requests that touch infrastructure. Begin with a short rule set that you agree with, rather than every rule available.
Quarter 3: your own code
SAST. OWASP warns of high false positive rates, so go in with a plan. Start on one repository, report only a few high confidence rule categories, and measure how many findings developers fix. Widen only when that rate is healthy.
Quarter 4: the live environment
CSPM. It matters most when many people have console access, or when several teams share accounts. Before buying or enabling it, decide who triages findings. A report no one reads is worse than none, because it creates false comfort.
Rules for moving on
- Move to the next tool when the last one has an owner and a fix workflow, not when it has zero findings.
- Track one number per tool: time from finding to fix.
- Never turn on blocking for a tool you have not run in report only mode for a few weeks.
Your situation can change the order. A mobile app team may put SCA and SAST ahead of containers. A team that is all infrastructure may put IaC first. For a smaller team, see scanner adoption for a five person startup.
Quick check
Why not start with SAST, since it reads my code?
It needs tuning and produces more false positives, so it costs more attention. Easier wins first builds trust in the process.
When should a scanner start blocking merges?
After a report only period where you have tuned rules and agreed that the findings are worth stopping for.
Sources
Last reviewed: 19 October 2026.
