Google Cloud Cost Management vs OpenCost

Google Cloud Cost Management helps organizations monitor, control, and optimize costs for Google Cloud. Its console reports and dashboards show current cost trends and forecasts. Teams can organize costs by organization, folder, project, or label, and use granular permissions to control who can spend, administer billing, or view costs. Budget thresholds can send alerts to stakeholders by email or Pub/Sub; programmatic notifications can also trigger actions to throttle resources and cap costs. Quotas help control spend rates, while recommendations address cost and usage and can be applied to realize savings. Billing usage, cost, and pricing data can be exported automatically to BigQuery. Billing APIs provide access to manage billing accounts, and the App Optimize API supplies resource cost and utilization metrics for dashboards and agents. The tools are available through web and API at no additional charge to Google Cloud customers. Customers still pay for the Google Cloud services they use, which may include BigQuery, Pub/Sub, Cloud Functions, and Cloud Storage. Google Cloud also provides free billing and payments support.

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.