PathSim vs eryx
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
PathSim compared with eryx
| Detail | P
PathSim | 
eryx |
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| What it does | Python framework for building and simulating dynamical systems using block diagrams
| WebAssembly sandbox for running untrusted Python safely
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Open source
| Open source
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| Pricing | Not given
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| Key features | - 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
| - Full CPython 3.14 with standard library
- Async callbacks from sandboxed code
- No filesystem or network unless allowed
- Fast startup in 1–5 milliseconds
- Embed from Python, JavaScript or Rust
- MCP server support
- gRPC server deployment
- Hosted execution over HTTP and WebSocket
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| What makes it different | - Readable, scriptable alternative to traditional simulation tools with solver depth
- Full ecosystem including FastSim Rust engine and standalone C code generation
- Minimal runtime dependencies: only numpy, scipy, and matplotlib
- Domain-specific toolboxes for chemical, battery, vehicle, flight, and RF engineering
- MIT license with open source development
| - Full CPython 3.14 running in WebAssembly
- Async callbacks between sandbox and host
- Extremely fast sandbox startup
- Works as MCP server for AI agents
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 38 ▼ −1 (down) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 6 | 0 |
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| Citation Flow (Majestic) | 14 | 6 |
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| Referring domains (Majestic) | 18 | 2 |
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4 details filled in for both companies.
More alternatives to PathSim More alternatives to eryx