Workflow Automation

PathSim

Block-based system modeling and simulation framework with browser visual editor.

Status
Generally available
Last checked
Checked · Oct 10, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

PathSim is a block-based system modeling and simulation framework that includes a browser-based visual editor, making it easy to create complex simulations without extensive coding knowledge.

PathSim stands out by offering a browser-based visual editor alongside its block-based system modeling framework, making it accessible to users without extensive programming experience while still providing powerful simulation capabilities.

When it fits — and when it doesn’t

A good fit for

  • Educators looking to create interactive learning materials for system modeling and simulation.

  • Industrial engineers needing a flexible tool for process simulation without deep coding knowledge.

Look elsewhere if

  • Projects requiring real-time data processing or high-frequency updates, as PathSim is primarily designed for batch-based simulations.

  • Teams that require cloud-hosted solutions with automatic scaling capabilities.

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited language support beyond JavaScript

    Primary development is in JavaScript, with no official support for other languages like Python or C++

  2. 02

    Performance issues with large-scale simulations

    Complex systems can cause significant lag and resource usage in the browser-based editor

  3. 03

    Small community and limited third-party integrations

    Few contributors on GitHub, limited plugins or extensions available for PathSim

What it does well

  • Block-based system modeling

  • Browser-based visual editor

  • Simulation framework for complex systems

  • Open-source and MIT licensed

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

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Set up PathSim

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →
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