ngspice vs OPEM
| ngspice | OPEM | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Linux, macOS, self-hosted, Windows | — |
| Free plan | Yes | Yes |
| Delivery mode | — | desktop |
| Offline access | — | Yes |
Both are listed in Best Physics Simulation Software. On Freedom251, ngspice scores higher on our published basis.