FDTDX vs SimFlow
FDTDX
fdtdx.readthedocs.io
SimFlow
sim-flow.comSide by side
| Figure | FDTDX | SimFlow |
|---|---|---|
| Price from | Free | €666.67/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 3 |
| Spec score · Physics Simulation Software | 8.6 (#12) | 9.3 (#1) |
| Authoring tools | Yes | Yes |
| Data export | Yes | Yes |
| Delivery mode | desktop | desktop |
| Free plan | Yes | Yes |
| Integrations | The API includes functions for importing GDS polygons and working with GDS layer stacks and ports. | SimFlow integrates with ParaView, OpenFOAM, Docker, and Windows Subsystem for Linux. |
| 3D visuals | Yes | Yes |
Plans
In their own words
SimFlow
SimFlow is desktop software for computational fluid dynamics, covering the workflow from mesh generation through post-processing. Simulations stay on the user's hardware, and the software runs on Windows, Linux, and macOS, including Apple Silicon. Jobs can run on a local cluster, remote server, or cloud, with HPC-grade parallel computing and no per-core or hourly charges. The full simulation engine is included in every plan. CAD imports include STL, STEP, IGES, OBJ, and BRep; results can be exported in VTK, Fluent, Tecplot, and Ensight formats. SimFlow integrates with ParaView, OpenFOAM, Docker, and Windows Subsystem for Linux. The free plan has no signup, credit-card requirement, or time limit, but is limited to 200,000 mesh nodes and one CPU. Professional costs €8,000 per year; Enterprise costs €10,000 per year. Commercial plans include a 30-day trial. Perpetual licenses are also available, with one year of maintenance and optional yearly renewals.