Cast AI vs Rubrik
Side-by-side comparison of AI visibility scores, market position, and capabilities
Kubernetes cost optimization platform raised $108M Series C in Apr 2025 and achieved unicorn status at $1B+ in Jan 2026; AI-driven automation continuously rightsizes clusters for 2,100+ customers across AWS, Google Cloud, and Azure.
About
Cast AI is a Kubernetes cloud cost optimization platform founded to help engineering teams dramatically reduce their cloud infrastructure spending without manual intervention. The company was built on the observation that most Kubernetes clusters are significantly over-provisioned — teams allocate far more compute than workloads actually consume because manual right-sizing is time-consuming and risky. Cast AI's platform uses AI-driven automation to continuously analyze workload resource consumption, identify over-provisioned nodes, and automatically rightsize and rebalance clusters in real time across AWS, Google Cloud, and Azure.\n\nCast AI's core product sits between the cloud provider and the Kubernetes cluster, acting as an autonomous cost optimization layer that adjusts compute allocation dynamically based on actual usage patterns. The platform handles spot instance management, node autoscaling, pod bin-packing, and workload scheduling optimizations — capabilities that typically require dedicated platform engineering teams to implement manually. Cast AI provides a single-pane dashboard showing real-time savings, cost trends, and optimization recommendations across multi-cloud Kubernetes environments.\n\nCast AI raised a $108M Series C in April 2025 and achieved unicorn status at a $1B+ valuation in January 2026, reflecting strong product-market fit in the cloud cost management space. The company serves 2,100+ customers and has documented billions of dollars in cumulative cloud savings across its user base. Cast AI competes with Spot by NetApp, StormForge, and cloud-native autoscaling tools, differentiating through the depth of its autonomous optimization — going beyond simple recommendations to fully automated, continuous rightsizing.
Publicly traded cloud data management and cyber resilience platform (RBRK) for enterprise backup, recovery, and ransomware protection; converged scale-out infrastructure replaces traditional backup software and media server architectures.
About
Rubrik is a cloud data management and cyber resilience platform that provides enterprise backup, disaster recovery, ransomware protection, and data governance from a converged scale-out infrastructure that replaces traditional backup software and media server architectures with a software-defined approach running on commodity hardware or cloud. The platform's policy-driven data management engine allows administrators to define service level objectives — backup frequency, retention periods, recovery point objectives, and replication targets — at the virtual machine, application, or workload level, and the Rubrik cluster automatically manages all backup operations, deduplication, encryption, and tiering to object storage or cloud according to those policies without manual job scheduling. This policy-first model eliminates the operational complexity of managing thousands of individual backup jobs and schedules that makes traditional backup administration a full-time function at large enterprises.
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