Kubernetes CNI Security Guide 2026: Calico vs Cilium for Production Zero-Trust
Best Network Policy Tools for Kubernetes 2026 — Calico vs Cilium vs Weave Net: Complete Comparison Guide Published February 17, 2026 by Yaya Hanayagi Kubernetes networking security has evolved significantly, and choosing the right network policy tool in 2026 is crucial for cluster security, performance, and operational efficiency. This comprehensive guide analyzes the top network policy solutions available today, comparing their architectures, features, pricing, and real-world performance. Table of Contents Introduction to Kubernetes Network Policies The Network Policy Landscape in 2026 Detailed Tool Analysis Performance Benchmarks Comparison Tables Decision Framework Security Considerations Integration Patterns FAQ Section Conclusion Introduction to Kubernetes Network Policies Network policies in Kubernetes define rules that control traffic flow between pods, namespaces, and external endpoints. By default, Kubernetes allows all pod-to-pod communication—a design that prioritizes connectivity over security. Network policies enable zero-trust networking by explicitly defining allowed communication paths. ...