ECS vs EKS vs Fargate
ECS and EKS are alternatives along the "which container orchestrator" axis. Fargate is a serverless launch type that runs underneath either one — not a third parallel option. Understanding this distinction is the key to this comparison.
| Aspect | Amazon ECS | Amazon EKS |
|---|---|---|
| Orchestration | AWS-proprietary container orchestrator | Managed Kubernetes (industry standard) |
| Learning curve | Simple, low learning curve for AWS users | Requires Kubernetes knowledge, steeper curve |
| Portability | AWS-only (hard to migrate elsewhere) | High portability across clouds/on-premises (Kubernetes standard) |
| Control plane | Free | Billed hourly per cluster |
| Best fit | Teams wanting a simple, AWS-only setup | Teams with Kubernetes expertise or a multi-cloud strategy |
How to Choose
Choose EKS if you already have Kubernetes expertise or assets (e.g., Helm charts) and value multi-cloud portability. Choose ECS for a simpler, AWS-only setup with a lower learning curve. Either way, choose the Fargate launch type to avoid server management, or the EC2 launch type for cost optimization and finer instance control. Fargate is a serverless compute option that runs on top of either ECS or EKS.
Exam Points
- SAA frequently tests the two independent axes: "leverage Kubernetes knowledge" → EKS, "simple containerization" → ECS, "eliminate server management" → Fargate launch type
- DOP covers building CI/CD pipelines and task definition design for ECS/EKS
- Fargate typically costs more per unit than the EC2 launch type since it removes instance management — a recurring cost-optimization point
Related Service Guides
References
Last updated: 2026-09-06
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