Best ngspice Alternatives in 2026
Updated
20 platforms from physics simulation software ranked against ngspice on the same published basis.
- 1ngspice vs SimFlow
- 2ngspice vs COMSOL Multiphysics
- 3ngspice vs FeenoX
- 4ngspice vs OpenSim
- 5ngspice vs Xcos
- 6ngspice vs myPhysicsLab
- 7ngspice vs SimScale
- 8ngspice vs FDTDX
- 9ngspice vs DynamicalSystems.jl
- 10ngspice vs Open Source Physics
- 11ngspice vs Ansys Fluent
- 12ngspice vs OpenFOAM
- 13ngspice vs 3JCN Physics Simulation
- 14ngspice vs PhysSandbox
- 15ngspice vs Step
- 16ngspice vs FEATool Multiphysics
- 17ngspice vs ASCEND
- 18ngspice vs PhysicsPlayground
- 19ngspice vs MATLAB Grader
- 20ngspice vs GNU FisicaLab
ngspice alternatives compared
| # | Platform | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | SimFlow | 9.2 | Free plan | €666.67/mo | Linux, Mac, Web, Windows |
| 2 | COMSOL Multiphysics | 8.7 | No | — | API, Linux, Mac, self-hosted, Web, Windows |
| 3 | FeenoX | 8.5 | Free plan | Free | API, Linux, self-hosted, Web |
| 4 | OpenSim | 8.4 | Free plan | Free | API, Linux, Mac, Windows |
| 5 | Xcos | 8.3 | Free plan | Free | Windows, Mac, Linux |
| 6 | myPhysicsLab | 8.1 | Free plan | Free | Linux, Mac, self-hosted, Web, Windows |
| 7 | SimScale | 8.0 | No | — | Web |
| 8 | FDTDX | 8.0 | Free plan | Free | Linux, self-hosted |
| 9 | DynamicalSystems.jl | 8.0 | Free plan | Free | Linux, Mac, Windows |
| 10 | Open Source Physics | 7.9 | No | — | Web, Windows, Mac, Linux, iOS, Android |
| 11 | Ansys Fluent | 7.7 | No | — | — |
| 12 | OpenFOAM | 7.6 | No | — | Windows, Mac, Linux |
| 13 | 3JCN Physics Simulation | 7.5 | Free plan | Free | Web |
| 14 | PhysSandbox | 7.4 | Free plan | Free | Web |
| 15 | Step | 7.3 | No | — | Linux |
| 16 | FEATool Multiphysics | 7.3 | No | — | Windows, Linux, Mac |
| 17 | ASCEND | 7.3 | No | — | Windows, Mac, Linux |
| 18 | PhysicsPlayground | 7.3 | Free plan | Free | Web |
| 19 | MATLAB Grader | 7.3 | Free plan | Free | Linux, Mac, Web, Windows |
| 20 | GNU FisicaLab | 7.2 | No | — | — |
Make your platform an alternative to ngspice
See the priceThe sponsored alternative slot on this page is labelled and never changes the order above.
Questions about ngspice alternatives
What is the best alternative to ngspice?
SimFlow, number 1 in physics simulation software with a score of 9.2 out of 10. The others here: COMSOL Multiphysics, FeenoX, OpenSim and 16 more.
What is the best free alternative to ngspice?
SimFlow is the best-ranked alternative with a free plan. 11 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on. Paid placements never change a rank.