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Head-to-head · Container Networking Software

Calico Open Source vs Azure CNI

  • 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
Azure CNI #9 in Container Networking Software 8.1/10 Free plan Free plan✓ 4 of 5 features Visit Azure CNI

Calico Open Source leads on 0 checks, Azure CNI 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 8.1 out of 10; our editors rank them #2 and #9.

Calico Open Source is the better fit for free, full-featured Kubernetes networking. Azure CNI is the better fit for azure Kubernetes Service networking.

  • Calico Open Source fits best

    Free, full-featured Kubernetes networking

  • Azure CNI fits best

    Azure Kubernetes Service networking

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 ↗ Azure CNI 8.1/10 Visit ↗
At a glance
Editor score 9.2 8.1
Ranking #2 in Container Networking Software #9 in Container Networking Software
Best for Free, full-featured Kubernetes networking Azure Kubernetes Service networking
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Cloud, Self-hosted
Platforms Linux, Windows Linux, Windows
Support Community, Docs Docs
Integrations 4 integrations 7 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Calico Open Source 5/5 · Azure CNI 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 Linux, Windows, Azure Kubernetes Service, Azure CNI Overlay, Azure CNI Pod Subnet, Azure CNI Node Subnet
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 and open source with multiple Azure networking models
  • Supports Cilium and Kubernetes NetworkPolicy enforcement
  • Offers overlay, pod-subnet, dual-stack and egress controls
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 Azure Kubernetes Service and Azure networking
  • Underlying Azure resources are billed separately
  • Some encryption features require additional networking services
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 →

Azure CNI is Microsoft's container networking interface for workloads running in Azure Kubernetes Service (AKS). It is designed for Kubernetes operators who need Azure virtual network integration, scalable pod networking, or direct…

Read the review →
  1. Calico Open SourceContainer Networking Software 9.2Free plan
  2. Azure CNIContainer Networking Software 8.1Free 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

  • Azure CNI — where it wins

    • Free and open source with multiple Azure networking models
    • Supports Cilium and Kubernetes NetworkPolicy enforcement
    • Offers overlay, pod-subnet, dual-stack and egress controls

    Where it doesn't

    • Focused on Azure Kubernetes Service and Azure networking
    • Underlying Azure resources are billed separately
    • Some encryption features require additional networking services

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