Calico Enterprise vs OVN-Kubernetes

Calico Enterprise is a self-managed platform for network security and observability in Kubernetes clusters. It provides pod-to-pod networking within single clusters and across multiple clusters, with data-plane options including eBPF, nftables, iptables, Windows, and VPP. Cluster mesh connects clusters for pod communication and service discovery, while supporting policy enforcement and traffic visibility. Security controls include network- and application-layer policies, DNS policies, egress controls, and workload microsegmentation. It also provides workload-level IDS/IPS, a workload-focused WAF, and DDoS detection and prevention. For observability, Calico combines flow logs with Kubernetes context and offers network topology views, dashboards, alerts, and workload packet capture. Tigera lists support for PCI DSS, HIPAA, GDPR, SOC 2, NIST, CCPA, and custom compliance frameworks, along with continuous monitoring and audit-ready reports. Policy deployment can integrate with CI/CD tools such as ArgoCD and Jenkins. The product supports hybrid deployment and centralized control, with BGP, IP-in-IP, VXLAN, WireGuard, TCP, UDP, SCTP, ICMP, ICMPv6, and HTTP listed as supported protocols.

OVN-Kubernetes is a free, open-source networking solution and CNI-conformant plugin for Kubernetes, built on OVN and Open vSwitch. It handles pod IP allocation and interfaces, GENEVE overlays, Kubernetes Services, EndpointSlices, network policies, and IPv4/IPv6 dual-stack clusters. OVN ACLs enforce NetworkPolicy, AdminNetworkPolicy, and EgressFirewall rules; EgressIP, EgressService, and EgressQoS govern outbound traffic. Pods can join multiple networks, and the project also supports multicast, traffic shaping, BGP route advertisements, and SmartNIC or DPU offload. For KubeVirt, it provides persistent IPs during live migration; Hybrid Overlay enables mixed Windows and Linux networking. Deployment documentation covers Kind, Helm, DPU acceleration, kubeadm, and source builds. Requirements depend on OVN, nft, Multus, CNI, and Kubernetes versions; the master branch lists Kubernetes 1.33 or newer. Secondary User Defined Networks currently lack north-south traffic and core Kubernetes Services support. AdminNetworkPolicy APIs remain alpha and may change before stable v1.