Early stage. No dedicated security person. You still need to pick a runtime security tool (like CSPM, CNAPP, or container scanning).
Here's how we did it without drowning in complexity:
**Focus on these three practical filters:**
* **Integration & Automation:** Does it plug directly into our existing CI/CD (GitHub Actions, GitLab) and cloud provider (AWS, GCP)? We ruled out anything requiring manual scans or a separate dashboard to check. Must block builds/deployments automatically on critical findings.
* **Noise-to-Signal Ratio:** Tried free tiers of big names. The alerts were overwhelming. Prioritize tools that clearly map findings to a specific, actionable remediation step (e.g., "This S3 bucket is public: here's the Terraform line to change").
* **True Cost at Scale:** Look beyond the first 50 workloads. Many price per node/host. We calculated cost for our projected 6-month and 1-year growth. Open-source tools (like Trivy for scanning) handled the basics, but we needed managed coverage for cloud context.
**Our evaluation scorecard was simple:**
* (30%) Automated Enforcement in Pipeline
* (25%) Clear, Actionable Remediation Guidance
* (20%) Pricing Model at 2x Our Current Scale
* (15%) Quality of Default Policies (OWASP, CIS)
* (10%) Time to First Useful Report (< 1 hour)
We skipped the massive RFP. We ran a 2-week PoC with two finalists, feeding them the same real workload. The winner gave us a failing pipeline build on day one with a clear fix. That was the proof.
I'm a platform engineer at a 300-person fintech, running 120+ services on EKS (AWS). We shifted left on security a year ago, so I own the runtime tooling selection and enforcement.
**Pricing model and hidden costs**: Most CNAPP vendors price per node/hour. You'll see $8-15/node/month. The hidden cost is the managed k8s control plane; many charge for those "nodes" too, doubling your bill. Open-source Falco is free but needs 2-3 hours/week for rule tuning and alert routing.
**Deployment and integration effort**: Commercial tools (Wiz, Lacework) deploy a collector DaemonSet in under an hour. The real effort is integrating their API into your CI to block builds. Budget a day to set the policies and test fail scenarios. Open-source stacks (Trivy + Grype + Falco) need a Helm chart per tool and a unified dashboard, which is a 3-5 day integration project.
**Alert quality and fatigue**: We ran a POC with a major vendor and got 12,000 alerts in week one, 95% for outdated base images. The tools that worked for us could correlate a runtime process (e.g., crypto mining) with the specific pod, image, and CI run that deployed it. Look for tools that bundle findings into a single "exploit chain" event.
**Where it breaks**: Any agent-based tool breaks if your node autoscales rapidly; you'll get 5-10 minute coverage gaps. Sidecar models (like Datadog's security agent) avoid this but add 100-150MB RAM per pod. Network-based tools miss encrypted traffic unless you provide TLS keys, which is a non-starter for us.
My pick is Wiz for your early-stage context, specifically for its single, read-only cloud connector and automatic workload discovery. It gives you immediate cloud context (like that public S3 bucket) without installing node agents. If your compliance requirements are minimal and you have the engineering cycles, the Trivy+Falco combo is free and effective, but you'll own the alert pipeline. To decide cleanly, tell us your average container lifespan and if you have a dedicated Slack channel for security alerts.