OpenCost review

The open-source standard for Kubernetes cost visibility.

Verdict

OpenCost is a valuable wildcard because it provides a foundational, open-source standard for Kubernetes cost monitoring, backed by the CNCF, giving teams visibility without vendor lock-in.

What customers praise

It delivers accurate cost allocation for Kubernetes resources (pods, namespaces, labels) out of the box and integrates natively with Prometheus and Grafana, fitting perfectly into an existing cloud-native observability stack.

What customers criticise

OpenCost is a monitoring tool, not an optimization platform; it shows you where money is going in K8s but does not provide automated rightsizing or savings recommendations.

Best for

Engineering teams that need a free, open-source, and vendor-neutral way to accurately measure and allocate Kubernetes costs.

At a glance

• Integrations: Kubernetes, AWS, Azure, GCP, Prometheus, Grafana
• Regions served: Global
• Typical onboarding: 1 day
• Free tier: yes

Red flags

Public risk signals as of June 2026: none. No material public risk signals as of 2026-06-15. See the full red-flag report.

Alternatives

See alternatives to OpenCost, or compare against the next-ranked entry: .

Source: Top 11 The 11 Best Cloud Cost Management Tools, verified June 15, 2026 — no paid placement.