Invariant vs Shadow
| Invariant | Shadow | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api, Web | Linux |
| Free plan | Yes | Yes |
| Deployment | hybrid | — |
| Protocol support | BGP, OSPF, IPSec, NAT, policy-based routing, VPN, ACL, VLAN | — |
| Scheduled tests | Yes | — |
| API access | Yes | — |
Both are listed in Best Network Testing Software. On Freedom251, Invariant scores higher on our published basis.