Calico Open Source vs Flannel
| Calico Open Source | Flannel | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | Free | Free |
| Open source | No | No |
| Platforms | Linux, self-hosted, Windows | Linux, self-hosted, Windows |
| Free plan | Yes | Yes |
| CNI plugin | Yes | Yes |
| Network policies | Yes | Yes |
| Egress control | Yes | — |
| Multi-cluster networking | Yes | — |
| Encryption in transit | Yes | Yes |
| Supported platforms | Kubernetes, Linux, Windows, OpenStack, virtual machines, bare metal | Kubernetes, Docker, Linux, Windows |
Both are listed in Best Container Networking Software. On Inferse, Flannel scores higher on our published basis.