Fact sheet · Developer Tools
PathSim
Python framework for building and simulating dynamical systems using block diagrams
Build, simulate, and analyze continuous-time, discrete-time, and hybrid systems using intuitive block diagrams with 30+ solvers and event handling.
Overview
PathSim is a Python framework for modeling continuous-time, discrete-time, and hybrid dynamical systems as block diagrams. It offers engineers and researchers a readable, scriptable alternative to traditional simulation tools, with more than thirty explicit, implicit, and adaptive integrators, zero-crossing events and scheduled triggers, hot-swappable blocks, and hierarchical subsystems. The only runtime dependencies are numpy, scipy, and matplotlib.
The PathSim ecosystem includes PathView, a visual block-diagram editor in the browser; FastSim, a Rust engine with the same API that generates standalone C for embedded deployment; and dedicated toolboxes for chemical, battery, vehicle, flight, and RF engineering. PathSim and its domain toolboxes are released under the MIT license.
Feature facts
- 30+ solvers including implicit, explicit, and adaptive integrators
- Zero-crossing detection and scheduled events for hybrid systems
- Hot-swappable blocks and solvers during active simulation
- Hierarchical subsystems for modular component design
- MIMO support with multiple input and output ports
- Browser-based visual editor with PathView
- Domain toolboxes for chemical, battery, vehicle, flight, and RF engineering
- Custom blocks through subclassing the base Block class
- Supports continuous-time, discrete-time, and hybrid systems
- FMI integration to wrap Co-Simulation and Model-Exchange FMUs
Pricing
Pricing model: Open source
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PathSim specifications
| Section | Developer Tools |
|---|---|
| Website | pathsim.org |
| Votes2 | 0 |
PathSim metrics
| Metric | Value |
|---|---|
| Domain Rating | 38 −1 (down) since last check |
| Trust Flow | 6 no change since last check |
| Citation Flow | 14 no change since last check |
| Referring domains | 18 no change since last check |
| External backlinks | 66 no change since last check |
Fact: Ahrefs Domain Rating checked 12 Nov 2026, fact changed 6 Nov 2026. Fact: top topic Business/Consumer Goods and Services (6). Fact: Majestic checked 4 Nov 2026, fact changed 4 Nov 2026. Link facts from Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
PathSim domain fact sheet
Open the fact sheet
| Domain age | 1 year |
|---|---|
| Registered | |
| Expires | |
| Registrar | Squarespace Domains LLC |
| DNSSEC | Not signed |
PathSim launch receipt sheet
What we have measured for PathSim since it went live on SaaS Directory Info on 4 November 2026.
- 38 Domain Rating (Ahrefs) −1 (down) since launch
at launch: 39 (4 Nov 2026); latest: 11 Nov 2026 - 6 Trust Flow (Majestic)
first measured 4 Nov 2026 - 18 Referring domains (Majestic)
first measured 4 Nov 2026
Day 7 since launch. Next receipt: day 30, 4 Dec 2026. The figures report a change; they do not say what caused it, and many things can. No figure here is a guess.
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Frequently looked up
- Q1What are the main runtime dependencies for PathSim?
- The only runtime dependencies are numpy, scipy, and matplotlib.
- Q2How can PathSim models be installed?
- PathSim can be installed via pip with 'pip install pathsim' or via conda with 'conda install -c conda-forge pathsim'.
- Q3What is FastSim and how does it relate to PathSim?
- FastSim is a Rust reimplementation of PathSim with an identical Python API and standalone C code generation for embedded deployment.
- Q4What is PathView?
- PathView is a visual block diagram editor that allows users to build and simulate PathSim models directly in the browser.
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See also
| Product | Origin | DR1 | Votes2 |
|---|---|---|---|
| liquid-technologiesXML code generator for C# and Visual Basic .Net that creates strongly typed object models from XML schemas | United Kingdom | 70 | 0 votes. Log in to vote for liquid-technologies in the file |
 APIGitGit-native platform for building, publishing, sharing, and securing APIs | United States | 36 | 0 votes. Log in to vote for APIGit in the file |
 eryxWebAssembly sandbox for running untrusted Python safely | not stated | 0 | 0 votes. Log in to vote for eryx in the file |
 TestFlows MachineRun your programs deterministically. Record, replay, and branch your runs. | not stated | 2 | 0 votes. Log in to vote for TestFlows Machine in the file |