AWS Proton Is End-of-Support: 5 Migration Paths for Platform Teams (and How to Pick One)

AWS Proton reached end of support on October 7, 2026, ending its control plane, console, API, template registry, and self-service abstractions while leaving already provisioned CloudFormation stacks, Terraform state, workloads, IAM roles, and other resources in customers’ AWS accounts operational. The proposed migration approach begins by exporting template bundles and inventorying environments, service templates, instances, components, and provisioning modes, then moving underlying infrastructure definitions into Git and importing existing resources rather than recreating them. It identifies five main destinations: direct infrastructure-as-code and CI workflows, AWS-native combinations such as CodePipeline and Service Catalog, self-built developer portals using Backstage or Port with Crossplane or Terraform, managed internal developer platforms including Qovery, Humanitec, and Northflank, and Kubernetes GitOps tools such as Argo CD or Flux. The recommended choice depends primarily on available platform-engineering capacity, with managed platforms presented as more suitable for small teams and custom platforms as more viable for larger teams. A three-stage, roughly 10-week plan for a 30-service estate recommends freezing new Proton template versions, re-owning and validating infrastructure code, and replacing the developer self-service layer last, while running old and new paths in parallel to reduce production risk.

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