Adoption & Ecosystem
Who uses it
The organizations below are listed with a success story in the project's ADOPTERS file (source 8). VMware vSphere Kubernetes Service (VKS) uses Antrea as its default CNI (source 6).
| Organisation | Use case | Source |
|---|---|---|
| Glasnostic | Uses Antrea's Open vSwitch support to tune how services interact in Kubernetes clusters | ADOPTERS.md |
| Transwarp | Uses Antrea ClusterNetworkPolicy and NetworkPolicy to protect a multi-tenant big-data platform, Egress to keep the source IP, and OVS for pod-to-pod across flannel and Antrea clusters | ADOPTERS.md |
| TeraSky | Uses Antrea Cluster Network Policies, Network Policies, and Egress in internal clusters and customer environments | ADOPTERS.md |
| VMware vSphere Kubernetes Service (VKS) | Ships Antrea as the default CNI | The New Stack |
Adoption signals
Measured on the repository on 2026-06-26 via gh api repos/antrea-io/antrea and the contributors API (source 1):
- Stars: 1,794
- Forks: 477
- Open issues: 201
- Unique contributors: 142
- Latest release: v2.6.2, 2026-06-13 (source 10)
The project carries an OpenSSF Best Practices badge (project 4173), shown in the repository README (source 1).
Ecosystem
- Flow Aggregator (
cmd/flow-aggregator) collects IPFIX flow records from agents and exports them to external collectors such as Grafana. antctl(cmd/antctl) is the operational CLI for inspecting agent and controller state.- Theia, a separate project, builds network flow visualization on top of the Flow Aggregator output.
- Open vSwitch, a Linux Foundation project, is the data plane Antrea programs.
- Antrea Multi-cluster (
multicluster/) extends policy and service reach across clusters.
Alternatives
Antrea's distinguishing trait is the OVS data plane: mature observability (IPFIX, NetFlow, sFlow, SPAN) and first-class Windows support, since the Windows code paths exist alongside Linux ones (*_windows.go files across packages). The eBPF-based options center on Linux.
| Alternative | Differs by |
|---|---|
| Cilium | eBPF data plane (no OVS); CNCF Graduated; pick it when eBPF and L7 identity-aware policy are hard requirements |
| Calico | BGP or eBPF data plane from Tigera; pick it for BGP-native routing and a large managed-Kubernetes footprint |
| flannel | Simple overlay with no built-in NetworkPolicy; pick it when you only need basic pod connectivity |
| kube-router | BGP routing plus services and policy in one daemon; lighter, fewer advanced policy features |
| Weave Net | Mesh overlay; simpler model, far less active than Antrea today |