Infracost vs OpenCost

Infracost brings cloud cost estimates and FinOps guidance into infrastructure-as-code workflows, helping teams find cost issues before deployment. It supports Terraform, CloudFormation, and AWS CDK projects across AWS, Azure, and Google Cloud. Infracost Cloud tracks more than 10 million price points and presents estimates and FinOps guidance in pull requests and IDEs. Its CI/CD integration can comment on cost differences, policy violations, and tagging issues introduced by a change. Cloud also offers custom guardrails, price books, and tagging policies; Issue Explorer can identify optimization opportunities and open pull requests with fixes. Infracost AI combines provider billing, subscriptions, gateway logs, and agent telemetry to reconcile spend and build what-if scenarios for models and routing strategies. The free CI/CD plan includes 1,000 runs per month. Starter costs $250 a month and includes 10,000 runs per month and email support. Estimates from Terraform HCL alone may not resolve values only known at plan time; Terraform plan JSON is recommended for those cases.

OpenCost is a vendor-neutral open source project for measuring and allocating Kubernetes and cloud infrastructure costs. It breaks down costs in real time to Kubernetes concepts and containers for showback, chargeback, and reporting. Allocation covers CPU, GPU, memory, load balancers, and persistent volumes, and it can monitor cloud resources outside Kubernetes. The included web UI visualizes Kubernetes allocations and related cloud costs. Its API provides real-time and historical Kubernetes cost reports using on-demand list prices and cloud provider cost and usage reports. Listed cloud providers include Alibaba, AWS, GCP, Microsoft Azure, Open Telekom Cloud, Oracle Cloud Infrastructure, OVHcloud, Scaleway, and STACKIT. Metrics and visualization integrations include Prometheus, Cortex, Thanos, Victoria Metrics, Grafana, and Grafana Cloud. OpenCost requires a Kubernetes cluster and Prometheus; Helm is recommended for full functionality. Cloud costs appear when provider billing data becomes available, usually several hours to 24 hours later, and on-demand pricing is not reconciled against billed actual costs. Cloud costs are not supported for on-premises clusters. OpenCost is free under Apache 2.0.