AKS vs. EKS Control Plane Pricing: What the Difference Actually Means

At first glance, AKS looks like it has a clear pricing edge over EKS. AKS offers a Free tier with no control-plane charge, while EKS charges $0.10 per cluster-hour during standard Kubernetes version support, rising to $0.60 during extended support. But that comparison needs an important qualification: the AKS Free tier doesn't come with a financially backed uptime SLA, and Microsoft positions it for development, testing, and smaller non-critical workloads, not production. If you want an SLA and the scalability guarantees production actually needs, you're on the Standard tier, which is paid.

I run both AKS and EKS in production, so this isn't theoretical for me. Here's what that tiered pricing actually changes and what it doesn't.

What it changes

If you're spinning up short-lived clusters for testing, staging, or per-team isolation, the AKS Free tier gets meaningfully cheaper as your cluster count grows, since there's no control-plane charge at all for those non-production clusters. On EKS, every extra cluster carries that flat $0.10-per-hour cost regardless of how small the workload is, so teams tend to consolidate into fewer, larger clusters just to avoid the overhead. This can change how teams think about cluster boundaries, especially when separate development or testing clusters would otherwise introduce recurring management charges.

What it doesn't change

The operational differences between the two are still bigger than the pricing headline suggests. Azure Container Registry and ECR have different governance models for image lifecycle and role-based access, and migrating that tooling isn't free even if the compute is. Networking is where most of the real friction lives. Azure's VNet and Network Watcher setup versus AWS's VPC and security group model require genuinely different mental models, not a find-and-replace. If your team knows one deeply and switches to save on control plane cost alone, you'll spend that savings back in ramp-up time.

The part the pricing comparison misses

The part that doesn't show up in any pricing comparison is reliability engineering. I hold both clusters to the same SLOs and error budgets, and the tooling to actually enforce that discipline is not equivalent out of the box. Azure Monitor and Application Insights give you a more integrated starting point on AKS. On EKS, I've had to lean harder on CloudWatch plus something else, usually Splunk in my case, to get the same visibility. That's not a knock on EKS. It's just a real cost that a control plane pricing comparison won't capture, and it's the cost that actually determines whether an incident gets caught before or after it pages someone.

Where I'd land

If you're choosing between the two today, the AKS Free tier can be attractive for high cluster-count development and testing environments, where the lack of an SLA doesn't matter. For production workloads, the comparison has to include AKS Standard pricing, uptime requirements, support levels, and the operational cost of each ecosystem, not just the headline control-plane number. I wouldn't move an established EKS environment for a pricing difference alone. But I would think twice before defaulting straight to EKS on a brand new non-production cluster.