CAST AI vs KubeAdapt

CAST AI is an Application Performance Automation platform for cloud-native operations and Kubernetes automation. It automates workload rightsizing, node scaling, GPU and Spot optimization, and issue remediation. Rightsizing adjusts CPU and memory requests, limits, and replicas in response to workload behavior. The platform says its engine can predict Spot interruptions up to 30 minutes ahead and migrate workloads before a slowdown. Agentic runbooks can address operational and security issues, with approval required for each change before it ships.

Teams can connect clusters in read-only mode without infrastructure changes. Listed environments include AWS, Google Cloud, Azure, Oracle Cloud, IBM Cloud, OpenShift, Rancher, VMware Tanzu, AliCloud, kOps, PostgreSQL, MySQL, and on-prem Kubernetes. Cost tools include allocation, spend forecasting, rightsizing guidance, and commitment management. CAST AI integrates with tools including Grafana, Terraform, Prometheus, Jira, and Pulumi. It is available on the web and as self-hosted software. Pricing is custom and available on request; a free trial is available.

KubeAdapt monitors Kubernetes costs across clusters, namespaces, workloads, pods and teams, and provides cost forecasting, budget alerts and rightsizing recommendations. It works with AWS, Google Cloud, Azure, OpenShift and bare-metal Kubernetes. The agent is installed with one Helm chart; the site estimates installation takes about five minutes. Rightsizing guidance gives per-container CPU and memory recommendations as YAML for GitOps workflows, with OOM-aware, bursty-CPU and replica-aware guardrails. KubeAdapt does not apply recommended changes. Its agent has read-only Kubernetes permissions, limited to list and watch, and the company says it does not collect Secrets, ConfigMaps, environment variables, container logs or network traffic. Aggregated payloads are signed in-cluster and sent using TLS 1.3 with mutual TLS. Alerts for budgets, cost spikes and new workloads can go to Slack, email or webhooks. A read-only REST API exposes cost, capacity and resource data. The free plan covers the first 100 vCPU across an account. Paid rates range from $0.60 a month to $1.99 a month per billable vCPU, depending on tier; qualifying startups have a $0.60 a month rate.