Best SIMION Alternatives in 2026
Updated
20 apps from physics simulation software ranked against SIMION on the same published basis.
- 1SIMION vs OpenSim
- 2SIMION vs ngspice
- 3SIMION vs Xcos
- 4SIMION vs SimFlow
- 5SIMION vs FeenoX
- 6SIMION vs MPTRAC
- 7SIMION vs FEST-3D
- 8SIMION vs FDTDX
- 9SIMION vs DynamicalSystems.jl
- 10SIMION vs myPhysicsLab
- 11SIMION vs Open Source Physics
- 12SIMION vs PhysSandbox
- 13SIMION vs 3JCN Physics Simulation
- 14SIMION vs PyAutoLens
- 15SIMION vs SimScale
- 16SIMION vs PhysicsPlayground
- 17SIMION vs COMSOL Multiphysics
- 18SIMION vs OpenFOAM
- 19SIMION vs Ansys Fluent
- 20SIMION vs Chombo-Discharge
SIMION alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | OpenSim | 8.0 | Free plan | Free | API, Linux, Mac, Windows |
| 2 | ngspice | 7.9 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 3 | Xcos | 7.9 | Free plan | Free | Windows, Mac, Linux |
| 4 | SimFlow | 7.9 | Free plan | €666.67/mo | Linux, Mac, Web, Windows |
| 5 | FeenoX | 7.8 | Free plan | Free | API, Linux, self-hosted, Web |
| 6 | MPTRAC | 7.7 | Free plan | Free | Linux, self-hosted, Web |
| 7 | FEST-3D | 7.7 | Free plan | Free | Linux, Mac |
| 8 | FDTDX | 7.6 | Free plan | Free | Linux, self-hosted |
| 9 | DynamicalSystems.jl | 7.6 | Free plan | Free | Linux, Mac, Windows |
| 10 | myPhysicsLab | 7.6 | Free plan | Free | Linux, Mac, self-hosted, Web, Windows |
| 11 | Open Source Physics | 7.1 | No | — | Web, Windows, Mac, Linux, iOS, Android |
| 12 | PhysSandbox | 7.1 | Free plan | Free | Web |
| 13 | 3JCN Physics Simulation | 7.1 | Free plan | Free | Web |
| 14 | PyAutoLens | 7.1 | Free plan | Free | Linux, Mac, Windows |
| 15 | SimScale | 7.0 | No | — | Web |
| 16 | PhysicsPlayground | 7.0 | Free plan | Free | Web |
| 17 | COMSOL Multiphysics | 6.9 | No | — | API, Linux, Mac, self-hosted, Web, Windows |
| 18 | OpenFOAM | 6.9 | No | — | Windows, Mac, Linux |
| 19 | Ansys Fluent | 6.8 | No | — | — |
| 20 | Chombo-Discharge | 6.8 | Free plan | Free | Linux |
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Questions about SIMION alternatives
What is the best alternative to SIMION?
OpenSim, number 1 in physics simulation software with a score of 8.0 out of 10. The others here: ngspice, Xcos, SimFlow and 16 more.
What is the best free alternative to SIMION?
OpenSim is the best-ranked alternative with a free plan. 15 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.