AWS EKS vs ECS: Architecture, Cost & Use Cases (2026)
AWS EKS vs ECS: Architecture, Cost & Use Cases (2026) Answer-First: Choose AWS ECS for zero control-plane fees ($0/mo) and rapid AWS-native container deployment with minimal operational overhead. Choose AWS EKS ($73/mo per cluster) when requiring native GitOps via ArgoCD, KEDA event-driven autoscaling, Dapr sidecar injection, and cloud-agnostic Kubernetes ecosystem portability. The hidden costs of EKS VPC CNI ipam and how ECS handles routing faster. How to optimize IP allocation policies to prevent subnet exhaustion in large-scale Kubernetes environments. I’ve run both in production. At Vigo Retail, I architected a 21-service Go microservices platform on EKS handling 8,000 RPS peak and 25M+ requests/month. I’ve also managed ECS clusters for smaller AWS-native projects. This guide is what I wish existed before I made those decisions. ...