| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 1 |
| Spec score · Physics Simulation Software | 8.6 (#12) | 8.2 (#24) |
| Delivery mode | desktop | desktop |
| Free plan | Yes | Yes |
| Guides | Documentation includes interactive Jupyter quickstarts, physics tutorials, component examples, and an API reference. | The site provides tutorials and user guides, including a 2026 practical guide to production, separator tuning, and identification, plus a video tutorial. |
| Integrations | The API includes functions for importing GDS polygons and working with GDS layer stacks and ports. | The home page lists LISE for Excel (64-bit) as a built-in tool, and the download page lists LISE RayReader, which plots LISE++ Monte Carlo data using Matplotlib in Python. |
| Optimization | It provides built-in gradient-based optimization for complex 3D structures. | The program can optimize spectrometer parameters before or during an experiment and includes wedge and Wien filter selections. |
| Purpose | FDTDX is an open-source Python package for simulating and designing three-dimensional photonic nanostructures with the Finite-Difference Time-Domain method. | LISE++ calculates transmission and yields of fragments produced and collected in a spectrometer and simulates experiments from reaction parameters through registration of spectrometer-selected products. |
| 3D visuals | Yes | Yes |