Trivy Operator alternatives for Kubernetes vulnerability scanning

Most teams that search for a Trivy Operator alternative are not unhappy with the scanner — Trivy is excellent. They have hit the limits of the CRD model: reports that expire, no view across clusters, CVSS-only ranking, security data living in etcd, and an operator that needs tuning — scan jobs, report TTLs, database mirrors — to stay healthy on a busy cluster.

Facts last checked . Prices and features change — verify with the vendor before deciding.

What Trivy Operator does well

Before the list: Trivy Operator is a good tool for the right team. Trivy Operator is the free, Apache-2.0 Kubernetes operator from Aqua Security that scans running workloads with Trivy and writes the results into the cluster as custom resources.

  • Free, open source, and maintained by the company that maintains Trivy itself.
  • Nothing leaves the cluster — results are CRDs you read with kubectl.
  • Covers more than vulnerabilities: config audit, exposed secrets, RBAC assessment and compliance reports ship in the same operator.
  • Prometheus metrics out of the box, so a Grafana dashboard is quick to stand up.

Trivy Operator pricing

Trivy Operator is free and open source. The cost is operational: someone maintains the operator, tunes report TTLs and scan scopes to keep etcd healthy, and builds whatever aggregation, history and alerting the team needs on top of the CRDs. Aqua sells its commercial platform separately, quote-only.

Trivy Operator alternatives

1. StackRadar (that's us)

StackRadar keeps a CycloneDX SBOM for every image running in your Kubernetes clusters and re-checks it against OSV.dev advisories as they land — no rescan. Findings are ranked by the Radar Score, which combines CVSS, EPSS and the CISA KEV catalogue in a published formula, and every finding carries its workload, Helm release and ArgoCD application. One dashboard covers every cluster, with one to two years of history by plan. The whole product is open source and free to self-host for one cluster; the scanner installs as one Helm chart, releases are signed, and cloud data stays in the EU. The cloud starts with a 14-day free trial; then Pro $59 and Business $199 per month at the beta price ($99 and $299 standard).

Where Trivy Operator is stronger: you run one or two clusters and mainly want to know what is vulnerable right now. See StackRadar vs Trivy Operator for the full comparison.

2. Kubescape / ARMO Platform

Kubescape is a CNCF-incubating open-source Kubernetes security scanner whose in-cluster operator includes eBPF runtime relevancy and runtime threat detection; ARMO Platform is the commercial SaaS built on it, adding a hosted dashboard, history across clusters, EPSS/KEV-based prioritisation and, more recently, cloud detection and response.

Best for: You want misconfiguration, compliance and RBAC scanning in the same tool as vulnerabilities. Pricing: Quote-only (was ~$59/node/mo; free ≤10 nodes). Compare with StackRadar · Kubescape website

3. OWASP Dependency-Track

Dependency-Track is the OWASP open-source SBOM analysis platform: you send it CycloneDX SBOMs and it continuously re-evaluates them against vulnerability feeds, with EPSS support and KEV-aware policies.

Best for: You already produce CycloneDX SBOMs in CI and want a self-hosted place to track them. Pricing: Free (Apache-2.0); self-hosted operations cost. Compare with StackRadar · OWASP Dependency-Track website

4. Aqua Security Platform

Aqua Security is the enterprise container-security platform from the maintainers of Trivy, covering image scanning, Kubernetes security posture, runtime protection and supply-chain controls, sold to enterprises through sales.

Best for: You need runtime protection, admission control and enforcement, not just visibility. Pricing: Quote-only; free Trivy tooling separately. Compare with StackRadar · Aqua Security Platform website

Should you switch?

Choose Trivy Operator if

  • You run one or two clusters and mainly want to know what is vulnerable right now.
  • You have a hard rule that no data may leave the cluster — not even a dependency list.
  • You want config, secrets and RBAC checks in the same package.
  • Your team already lives in Grafana and the Prometheus metrics are enough.

Choose StackRadar if

  • You need one answer across every cluster, not one cluster at a time.
  • You need to answer “when did this first appear?” or “what were we exposed to in March?”
  • You want findings ranked by real-world exploitability (EPSS, KEV), not CVSS alone.
  • You need a dated paper trail for an auditor or an EU regulator (CRA, NIS2).
  • You are tired of operating the scanner: tuning scan jobs, report TTLs and database mirrors to keep it and etcd healthy.

Frequently asked questions

Is Trivy Operator good enough on its own?

For a single cluster where you want a current snapshot of vulnerabilities and some config checks, yes — it is a genuinely good free answer. It stops being enough when you need history, a multi-cluster view, exploitability-based ranking or a record you can show an auditor.

Can I run Trivy Operator and StackRadar together?

Yes, and it is the honest way to evaluate. The two do not conflict: install the StackRadar agent next to Trivy Operator on one cluster, leave both for a week, and compare the findings and the resource usage. Some teams then keep Trivy Operator for config, secrets and RBAC checks inside each cluster and use StackRadar as the one place that tracks vulnerabilities across all of them over time.

Why does Trivy Operator use so much CPU and memory?

Because of how it scans. Every workload gets its own scan Job, up to 10 run concurrently by default, each job loads the vulnerability database, and the whole cycle repeats when reports expire after 24 hours. On a large cluster that is a steady background load, and an image too big for the job’s memory limit (500M by default) is OOMKilled. It can be tuned — lower the concurrency, raise the limits, switch to ClientServer mode with a shared Trivy server — but it is tuning you own.

Does StackRadar download a vulnerability database into my cluster?

No. The agent only generates SBOMs; matching against advisories happens on the StackRadar server. The agent does pull each new image digest from its registry once to build the SBOM — Syft can use 300–600 MiB on a large image, so scans are serialised by default — and it never pulls that digest again, even across restarts.

Does Trivy Operator keep vulnerability history?

No. VulnerabilityReport objects have a TTL (24 hours by default), after which they are deleted and the workload is rescanned. Anything historical has to be exported and stored by you.

Does Trivy Operator use EPSS or CISA KEV?

Trivy Operator ranks by CVSS severity. EPSS exploitation probability and the CISA Known Exploited Vulnerabilities catalogue are not part of its reports, so a never-exploited 9.8 sorts above a 5.3 that is being exploited today.

More alternatives pages