Best Open Source Physics Alternatives in 2026
Updated
20 apps from physics simulation software ranked against Open Source Physics on the same published basis.
- 1Open Source Physics vs OpenSim
- 2Open Source Physics vs Xcos
- 3Open Source Physics vs SimFlow
- 4Open Source Physics vs FeenoX
- 5Open Source Physics vs FDTDX
- 6Open Source Physics vs DynamicalSystems.jl
- 7Open Source Physics vs myPhysicsLab
- 9Open Source Physics vs PhysSandbox
- 10Open Source Physics vs 3JCN Physics Simulation
- 11Open Source Physics vs SimScale
- 12Open Source Physics vs PhysicsPlayground
- 13Open Source Physics vs COMSOL Multiphysics
- 14Open Source Physics vs OpenFOAM
- 15Open Source Physics vs Ansys Fluent
- 16Open Source Physics vs ngspice
- 17Open Source Physics vs Physion
- 18Open Source Physics vs Step
- 19Open Source Physics vs ASCEND
- 20Open Source Physics vs MATLAB Grader
- 21Open Source Physics vs GNU FisicaLab
Open Source Physics 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 | 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 |
| 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 Open Source Physics
See the priceThe sponsored alternative slot on this page is labelled and never changes the order above.
Questions about Open Source Physics alternatives
What is the best alternative to Open Source Physics?
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 Open Source Physics?
OpenSim is the best-ranked alternative with a free plan. 12 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.