EKS vs AKS

Amazon EKS vs Azure AKS: a deep comparison for teams choosing between AWS and Azure managed Kubernetes in 2026.

kubernetescloudawsazureeksaks

Feature Matrix	Amazon EKS AWS managed Kubernetes with Karpenter, IRSA, and the deepest AWS service integrations.	Azure AKS Microsoft's managed Kubernetes with free control plane tier, native Entra ID, and first-class Windows support.
Control Plane Cost AKS Free tier has no SLA and is for dev only. Standard and Premium tiers add Uptime SLA at additional cost. EKS always charges $0.10/hr.	$0.10/hr per cluster	Free tier (no SLA) / Standard tier (Uptime SLA, separate pricing) / Premium
IAM Integration IRSA requires OIDC setup; AKS Workload Identity integrates deeply with Entra ID for Microsoft shops.	IRSA (IAM Roles for Service Accounts via OIDC)	Workload Identity (Entra ID / Azure AD)
Node Autoscaling Karpenter's speed and flexibility gives EKS a meaningful edge in autoscaling.	Karpenter or Managed Node Groups	Cluster Autoscaler on VMSS / Virtual Nodes (ACI)
Networking (CNI) Azure CNI Overlay (2024+) resolves AKS's historic IP exhaustion problems. EKS still needs prefix delegation for large clusters.	AWS VPC CNI (IP-per-pod)	Azure CNI / Azure CNI Overlay / Kubenet
Windows Node Support If you run Windows containers, AKS has a significant operational advantage.	Supported (complex setup)	First-class (native Windows node pools)
Upgrade UX Both offer auto-upgrade, but AKS's channels are simpler to configure than EKS's blue/green upgrade patterns.	Manual or Managed Node Groups	Auto-upgrade channels (similar to GKE Release Channels)
Spot / Low-Priority Nodes Karpenter's native spot handling is more sophisticated than AKS's spot node pools.	Spot Instances + Karpenter	Azure Spot VMs in node pools
Service Mesh Integration Neither has a great built-in service mesh story. OSM was deprecated; plan to self-manage Istio or Linkerd on either.	Manual (Istio, Linkerd, App Mesh)	Istio add-on (GA), Linkerd self-managed — OSM deprecated
Developer Tooling AKS has tighter VS Code integration. EKS has broader third-party tooling support.	aws CLI, eksctl, AWS Console	az CLI, Azure Portal, VS Code AKS extension
Compliance Certifications Both are well-certified for regulated industries. AKS edges out in European regulatory coverage.	SOC2, PCI DSS, HIPAA, FedRAMP	SOC2, PCI DSS, HIPAA, FedRAMP, ISO 27001

Overview

EKS vs AKS is primarily a cloud vendor decision, but the operational differences are real. EKS is the right default for AWS-native teams: IRSA + Karpenter is the best autoscaling stack on any cloud, and the depth of AWS service integrations (ALB, RDS, Secrets Manager) is unmatched. AKS wins on cost (free control plane for dev), Windows container support, and Entra ID integration for Microsoft-heavy enterprises. In 2026, AKS has also closed most of its historic networking gaps with Azure CNI Overlay.

Where EKS Wins

EKS is the right choice for AWS-native organizations. IRSA enables fine-grained IAM access for every pod without managing credentials. Karpenter, now CNCF-owned, provisions nodes directly (no ASG intermediary), bin-packs aggressively, and handles spot interruptions with rebalancing — no other cloud matches this. EKS also wins for GPU workloads with access to p4d, p5, and Inf2 instance families, and for teams that want to avoid Azure-specific lock-in while staying on a mature, widely-used platform.

Where AKS Wins

AKS wins in three clear scenarios: Microsoft shops (Entra ID / Azure AD Workload Identity is seamless), Windows container workloads (first-class Windows node pools with no friction), and cost-conscious dev environments (free control plane tier). AKS also has a simpler auto-upgrade story than EKS, and its Azure DevOps / GitHub Actions integrations are tight. For regulated industries with European data residency requirements, AKS's compliance portfolio is slightly broader.

Migration & Switching Cost

Moving between EKS and AKS requires reworking your IAM model (IRSA vs Workload Identity), networking (VPC CNI vs Azure CNI), ingress (ALB Ingress Controller vs AGIC or Nginx), and storage (EBS vs Azure Disk). Kubernetes manifests are portable; cloud-specific integrations are not. Budget 4–8 weeks for a mid-size production cluster. Run both clusters in parallel during migration and use Velero for stateful workload snapshots.

Final Verdict

For most teams, choose based on your cloud vendor: EKS if you're AWS-native, AKS if you're in Azure. If you run Windows containers, AKS is the clear winner regardless of other factors. If autoscaling efficiency and AWS service integration matter most, EKS + Karpenter is the stronger technical choice.

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Feature Matrix

Amazon EKS

AWS managed Kubernetes with Karpenter, IRSA, and the deepest AWS service integrations.

Azure AKS

Microsoft's managed Kubernetes with free control plane tier, native Entra ID, and first-class Windows support.

Control Plane Cost

AKS Free tier has no SLA and is for dev only. Standard and Premium tiers add Uptime SLA at additional cost. EKS always charges $0.10/hr.

$0.10/hr per cluster

Free tier (no SLA) / Standard tier (Uptime SLA, separate pricing) / Premium

IAM Integration

IRSA requires OIDC setup; AKS Workload Identity integrates deeply with Entra ID for Microsoft shops.

IRSA (IAM Roles for Service Accounts via OIDC)

Workload Identity (Entra ID / Azure AD)

Node Autoscaling

Karpenter's speed and flexibility gives EKS a meaningful edge in autoscaling.

Karpenter or Managed Node Groups

Cluster Autoscaler on VMSS / Virtual Nodes (ACI)

Networking (CNI)

Azure CNI Overlay (2024+) resolves AKS's historic IP exhaustion problems. EKS still needs prefix delegation for large clusters.

AWS VPC CNI (IP-per-pod)

Azure CNI / Azure CNI Overlay / Kubenet

Windows Node Support

If you run Windows containers, AKS has a significant operational advantage.

Supported (complex setup)

First-class (native Windows node pools)

Upgrade UX

Both offer auto-upgrade, but AKS's channels are simpler to configure than EKS's blue/green upgrade patterns.

Manual or Managed Node Groups

Auto-upgrade channels (similar to GKE Release Channels)

Spot / Low-Priority Nodes

Karpenter's native spot handling is more sophisticated than AKS's spot node pools.

Spot Instances + Karpenter

Azure Spot VMs in node pools

Service Mesh Integration

Neither has a great built-in service mesh story. OSM was deprecated; plan to self-manage Istio or Linkerd on either.

Manual (Istio, Linkerd, App Mesh)

Istio add-on (GA), Linkerd self-managed — OSM deprecated

Developer Tooling

AKS has tighter VS Code integration. EKS has broader third-party tooling support.

aws CLI, eksctl, AWS Console

az CLI, Azure Portal, VS Code AKS extension

Compliance Certifications

Both are well-certified for regulated industries. AKS edges out in European regulatory coverage.

SOC2, PCI DSS, HIPAA, FedRAMP

SOC2, PCI DSS, HIPAA, FedRAMP, ISO 27001