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Head-to-head · Container Networking Software

Calico Open Source vs OVN-Kubernetes

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Calico Open Source #2 in Container Networking Software 9.2/10 Free plan Free plan✓ 5 of 5 features Visit Calico
OVN-Kubernetes #4 in Container Networking Software 8.8/10 Free plan Free plan✓ 4 of 5 features Visit OVN-Kubernetes

Calico Open Source leads on 0 checks, OVN-Kubernetes on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreCalico Open Source · 9.2/10
  • Free planboth
  • Most featuresCalico Open Source · 5 of 5

Calico Open Source scores higher on our rubric for container networking software: 9.2 against 8.8 out of 10; our editors rank them #2 and #4.

Calico Open Source is the better fit for free, full-featured Kubernetes networking. OVN-Kubernetes is the better fit for feature-rich Linux and Windows clusters.

  • Calico Open Source fits best

    Free, full-featured Kubernetes networking

  • OVN-Kubernetes fits best

    Feature-rich Linux and Windows clusters

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Calico Open Source 9.2/10 Visit ↗ OVN-Kubernetes 8.8/10 Visit ↗
At a glance
Editor score 9.2 8.8
Ranking #2 in Container Networking Software #4 in Container Networking Software
Best for Free, full-featured Kubernetes networking Feature-rich Linux and Windows clusters
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Self-hosted
Platforms Linux, Windows Linux, Windows
Support Community, Docs Docs, Community
Built for Small business, Mid-market, Enterprise Mid-market, Enterprise
Features Calico Open Source 5/5 · OVN-Kubernetes 4/5
CNI plugin ✓ ✓
Network policies ✓ ✓
Egress control ✓ ✓
Multi-cluster networking ✓ (best) Not checked yet
Encryption in transit ✓ ✓
Specs
Supported platforms Kubernetes, Linux, Windows, OpenStack, virtual machines, bare metal Kubernetes, Linux, Windows, bare metal, VMware vSphere, IBM Power, IBM Z, and Red Hat OpenStack Platform
Our review
Pros
  • Free and open source with CNI networking and policy enforcement
  • Supports eBPF, nftables, iptables, Windows, and VPP data planes
  • Adds WireGuard, cluster mesh, and Whisker traffic observability
  • Free, open-source CNI with Kubernetes-conformant networking
  • Policy, egress, multihoming, dual-stack, and IPsec support
  • Supports hybrid Linux and Windows Kubernetes clusters
Cons
  • Its breadth may exceed the needs of simpler Kubernetes deployments
  • Requires self-hosted operation across supported infrastructure
  • Advanced capabilities can add architectural and operational complexity
  • Focused on Kubernetes cluster networking rather than general-purpose networking
  • OVN and Open vSwitch form a specialized networking foundation
  • The broad feature set may exceed simple cluster requirements
Our verdict

Calico Open Source is an open-source container networking and security platform maintained by Tigera. It is designed for teams running Kubernetes or other CNI-compatible orchestrators that need networking, policy enforcement, encryption,…

Read the review →

OVN-Kubernetes is an open-source Kubernetes Container Network Interface plugin for cluster administrators managing pod and service traffic. Built on Open Virtual Network and Open vSwitch, it provides overlay networking, policy enforcement,…

Read the review →
  1. Calico Open SourceContainer Networking Software 9.2Free plan
  2. OVN-KubernetesContainer Networking Software 8.8Free plan

Strengths and trade-offs

  • Calico Open Source — where it wins

    • Free and open source with CNI networking and policy enforcement
    • Supports eBPF, nftables, iptables, Windows, and VPP data planes
    • Adds WireGuard, cluster mesh, and Whisker traffic observability

    Where it doesn't

    • Its breadth may exceed the needs of simpler Kubernetes deployments
    • Requires self-hosted operation across supported infrastructure
    • Advanced capabilities can add architectural and operational complexity

  • OVN-Kubernetes — where it wins

    • Free, open-source CNI with Kubernetes-conformant networking
    • Policy, egress, multihoming, dual-stack, and IPsec support
    • Supports hybrid Linux and Windows Kubernetes clusters

    Where it doesn't

    • Focused on Kubernetes cluster networking rather than general-purpose networking
    • OVN and Open vSwitch form a specialized networking foundation
    • The broad feature set may exceed simple cluster requirements

More comparisons

All container networking software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update