Best OpenSim Alternatives in 2026
Updated
20 apps from physics simulation software ranked against OpenSim on the same published basis.
- 2OpenSim vs Xcos
- 3OpenSim vs SimFlow
- 4OpenSim vs FeenoX
- 5OpenSim vs FDTDX
- 6OpenSim vs DynamicalSystems.jl
- 7OpenSim vs myPhysicsLab
- 8OpenSim vs Open Source Physics
- 9OpenSim vs PhysSandbox
- 10OpenSim vs 3JCN Physics Simulation
- 11OpenSim vs SimScale
- 12OpenSim vs PhysicsPlayground
- 13OpenSim vs COMSOL Multiphysics
- 14OpenSim vs OpenFOAM
- 15OpenSim vs Ansys Fluent
- 16OpenSim vs ngspice
- 17OpenSim vs Physion
- 18OpenSim vs Step
- 19OpenSim vs ASCEND
- 20OpenSim vs MATLAB Grader
- 21OpenSim vs GNU FisicaLab
OpenSim alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 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 | FDTDX | 7.6 | Free plan | Free | Linux, self-hosted |
| 6 | DynamicalSystems.jl | 7.6 | Free plan | Free | Linux, Mac, Windows |
| 7 | myPhysicsLab | 7.6 | Free plan | Free | Linux, Mac, self-hosted, Web, Windows |
| 8 | Open Source Physics | 7.1 | No | — | Web, Windows, Mac, Linux, iOS, Android |
| 9 | PhysSandbox | 7.1 | Free plan | Free | Web |
| 10 | 3JCN Physics Simulation | 7.1 | Free plan | Free | Web |
| 11 | SimScale | 7.0 | No | — | Web |
| 12 | PhysicsPlayground | 7.0 | Free plan | Free | Web |
| 13 | COMSOL Multiphysics | 6.9 | No | — | API, Linux, Mac, self-hosted, Web, Windows |
| 14 | OpenFOAM | 6.9 | No | — | Windows, Mac, Linux |
| 15 | Ansys Fluent | 6.8 | No | — | — |
| 16 | ngspice | 6.7 | No | — | Windows, Mac, Linux |
| 17 | Physion | 6.7 | Free plan | $6/mo | Web |
| 18 | Step | 6.6 | No | — | Linux |
| 19 | ASCEND | 6.6 | No | — | Windows, Mac, Linux |
| 20 | MATLAB Grader | 6.6 | Free plan | Free | Linux, Mac, Web, Windows |
| 21 | GNU FisicaLab | 6.5 | No | — | — |
Make your app an alternative to OpenSim
See the priceThe sponsored alternative slot on this page is labelled and never changes the order above.
Questions about OpenSim alternatives
What is the best alternative to OpenSim?
Xcos, number 2 in physics simulation software with a score of 7.9 out of 10. The others here: SimFlow, FeenoX, FDTDX and 16 more.
What is the best free alternative to OpenSim?
Xcos 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 free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.