Best ngspice Alternatives in 2026
Updated
20 apps from physics simulation software ranked against ngspice on the same published basis.
- 1ngspice vs OpenSim
- 2ngspice vs Xcos
- 3ngspice vs SimFlow
- 4ngspice vs FeenoX
- 5ngspice vs FEST-3D
- 6ngspice vs FDTDX
- 7ngspice vs DynamicalSystems.jl
- 8ngspice vs myPhysicsLab
- 9ngspice vs Open Source Physics
- 10ngspice vs PhysSandbox
- 11ngspice vs 3JCN Physics Simulation
- 12ngspice vs SimScale
- 13ngspice vs PhysicsPlayground
- 14ngspice vs COMSOL Multiphysics
- 15ngspice vs OpenFOAM
- 16ngspice vs Ansys Fluent
- 17ngspice vs Chombo-Discharge
- 19ngspice vs Physion
- 20ngspice vs Step
- 21ngspice vs ASCEND
ngspice alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | OpenSim | 8.0 | Free plan | Free | API, Linux, Mac, Windows |
| 2 | Xcos | 7.9 | Free plan | Free | Windows, Mac, Linux |
| 3 | SimFlow | 7.9 | Free plan | €666.67/mo | Linux, Mac, Web, Windows |
| 4 | FeenoX | 7.8 | Free plan | Free | API, Linux, self-hosted, Web |
| 5 | FEST-3D | 7.7 | Free plan | Free | Linux, Mac |
| 6 | FDTDX | 7.6 | Free plan | Free | Linux, self-hosted |
| 7 | DynamicalSystems.jl | 7.6 | Free plan | Free | Linux, Mac, Windows |
| 8 | myPhysicsLab | 7.6 | Free plan | Free | Linux, Mac, self-hosted, Web, Windows |
| 9 | Open Source Physics | 7.1 | No | — | Web, Windows, Mac, Linux, iOS, Android |
| 10 | PhysSandbox | 7.1 | Free plan | Free | Web |
| 11 | 3JCN Physics Simulation | 7.1 | Free plan | Free | Web |
| 12 | SimScale | 7.0 | No | — | Web |
| 13 | PhysicsPlayground | 7.0 | Free plan | Free | Web |
| 14 | COMSOL Multiphysics | 6.9 | No | — | API, Linux, Mac, self-hosted, Web, Windows |
| 15 | OpenFOAM | 6.9 | No | — | Windows, Mac, Linux |
| 16 | Ansys Fluent | 6.8 | No | — | — |
| 17 | Chombo-Discharge | 6.8 | Free plan | Free | Linux |
| 19 | Physion | 6.7 | Free plan | $6/mo | Web |
| 20 | Step | 6.6 | No | — | Linux |
| 21 | ASCEND | 6.6 | No | — | Windows, Mac, Linux |
Make your app an alternative to ngspice
See the priceThe sponsored alternative slot on this page is labelled Sponsored.
Questions about ngspice alternatives
What is the best alternative to ngspice?
OpenSim, number 1 in physics simulation software with a score of 8.0 out of 10. The others here: Xcos, SimFlow, FeenoX and 16 more.
What is the best free alternative to ngspice?
OpenSim is the best-ranked alternative with a free plan. 13 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.