Flannel vs Calico vs Cilium: Best Kubernetes CNI Plugins 2026

Tue, 21 Apr 2026 00:00:00 +0000

Every Kubernetes cluster needs a Container Network Interface (CNI) plugin to handle pod-to-pod communication, service discovery, and network policy enforcement. Choosing the right CNI is one of the most impactful infrastructure decisions you’ll make — it affects network performance, security posture, operational complexity, and the features available to your workloads.

Cni on Pi Stack

Flannel vs Calico vs Cilium: Best Kubernetes CNI Plugins 2026