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Head-to-head · Container Networking Software

Calico Open Source vs Antrea

  • 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
Antrea #3 in Container Networking Software 9.0/10 Open source ✓ 0 of 5 features Visit Antrea

Calico Open Source leads on 0 checks, Antrea 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 planonly Calico Open Source
  • Most featuresCalico Open Source · 5 of 5

Calico Open Source scores higher on our rubric for container networking software: 9.2 against 9.0 out of 10; our editors rank them #2 and #3.

Calico Open Source is the better fit for free, full-featured Kubernetes networking. Antrea is the better fit for advanced policy and multi-cluster networking.

  • Calico Open Source fits best

    Free, full-featured Kubernetes networking

  • Antrea fits best

    Advanced policy and multi-cluster 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 ↗ Antrea 9.0/10 Visit ↗
At a glance
Editor score 9.2 9.0
Ranking #2 in Container Networking Software #3 in Container Networking Software
Best for Free, full-featured Kubernetes networking Advanced policy and multi-cluster networking
Pricing model Free Free
Starting price Free plan Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Self-hosted Cloud, Self-hosted
Platforms Linux, Windows Linux, Windows
Support Community, Docs Community, Docs
Integrations 4 integrations 10 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Calico Open Source 5/5 · Antrea 0/5
CNI plugin ✓ (best) Not checked yet
Network policies ✓ (best) Not checked yet
Egress control ✓ (best) Not checked yet
Multi-cluster networking ✓ (best) Not checked yet
Encryption in transit ✓ (best) Not checked yet
Specs
Supported platforms Kubernetes, Linux, Windows, OpenStack, virtual machines, bare metal Not checked yet
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
  • Advanced policy tiers, priorities, and cluster policies
  • Multi-cluster networking with encryption and service support
  • Traceflow, packet inspection, and flow visibility
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
  • Requires Kubernetes and Open vSwitch-based pod networking
  • Self-hosted deployment places operations with the adopting team
  • Its feature depth may exceed simpler cluster networking needs
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 →

Antrea is an open-source Kubernetes networking solution for teams managing clusters across public or private clouds and bare-metal infrastructure. It implements the Container Network Interface and Kubernetes NetworkPolicy, using Open…

Read the review →
  1. Calico Open SourceContainer Networking Software 9.2Free plan
  2. AntreaContainer Networking Software 9.0Open source

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

  • Antrea — where it wins

    • Advanced policy tiers, priorities, and cluster policies
    • Multi-cluster networking with encryption and service support
    • Traceflow, packet inspection, and flow visibility

    Where it doesn't

    • Requires Kubernetes and Open vSwitch-based pod networking
    • Self-hosted deployment places operations with the adopting team
    • Its feature depth may exceed simpler cluster networking needs
  • Calico Open Source9.2/10 · Free plan

    A free, broad Kubernetes networking stack with policy, encryption, and multi-cluster support.

    Visit CalicoFull verdict →
  • Antrea9.0/10 · Open source

    A strong open-source choice for advanced Kubernetes networking, policy, and visibility.

    Visit AntreaFull verdict →

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