Industrial strength simulation software for improving the performance of real systems. Vensim's rich feature set emphasizes model quality, connections to data, flexible distribution, and advanced algorithms. Configurations for everyone from students to professionals.


Some features & applications of Ventana simulation products:

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  • Causal Tracing™

    Vensim’s Causal Tracing enables fast and accurate analysis of model dynamics. See it in action in a video tutorial, or read more about it.

  • Allocation

  • Resources

    Browse our list of resources related to system dynamics and Vensim. Read More


We invite you to read about recent Vensim releases and other news:

  • Science Dynamics Reviews

    Our distributor in the Czech Republic has been publishing regular scientific reviews, all of them contain models and applications of Vensim. They are published in both English and Czech English edition: edition:      

  • Ventana news – Vensim 8.2 (inlcuding Apple M1 processor support) & Ventity releases

    1. Ventana Systems News 2. Vensim 8.2 including Apple M1 processor support 3. Forum daily digests 3. Ventity 4. Online courses. 5. Applications 6. In the Forum. 7. System Dynamics Conference News. 8. Resources for Vensim users. 9. Our official … Continue reading

  • Vensim 8.1 Release

    Vensim 8.1 is now available for download. See you at the System Dynamics Conference to talk about it!

Vensim Video Library

What’s new in Vensim 8.1?

Getting Started

Vensim Skills



  • Vensim 8.1 Release
    Vensim 8.1 is now available for download. See you at the System Dynamics Conference to talk about it!
  • Coronavirus & Epidemic Modeling
    Community Coronavirus Model This video explores a simple epidemic model, parameterized for a community confronting coronavirus. You can run the model using Vensim PLE or the Model Reader (or any higher version). Our getting started and running models videos provide a quick introduction to the software. The model: For PLE/Pro/DSS: community corona 7.mdl For the Reader (or any other): community ...
  • Translating Vensim models to Ventity
    This video covers Ventity’s features for importing Vensim models.0:00 – a quick overview of the import feature and how we think about it1:37 – importing a simple model of stock management18:05 – importing a more complex, subscripted competitive market model
  • Dynamic Simulation > Spreadsheets
    This video explores the improvements possible when a complex spreadsheet model is translated into Vensim.
  • Vensim 7 Synthesim + Sensitivity In Vensim 7, we’ve combined real-time Synthesim with sensitivity analysis, so you can see the distribution of outcomes from Monte Carlo runs interactively. This is great for giving users an appreciation of the risk associated with a decision, rather than just a best guess.
  • Data Science, Connected to the Bottom LineData Science, Connected to the Bottom Line Vensim can be used to put big data in context, by incorporating the learnings from big data in simulations that account for organizational structure and finances. Vensim can also do data intensive simulation, with flexible I/O, advanced algorithms for calibration, optimal filtering, confidence bounds and Monte Carlo simulation.
  • Modeling Discrete & Stochastic Events
    It’s generally a good idea to begin thinking about your models with continuous time and quantities, particularly for strategic applications where you care about the big picture. But there are times when it matters that quantities are discrete – you can’t ride half a horse. Here’s a quick look at modeling such situations, starting with ...
  • Vensim Causal Loop Diagramming
    This video shows several ways to build causal loop diagrams in Vensim. We start simple with Vensim PLE, and then illustrate some additional features, like navigation links, that are possible in DSS. The first ten minutes should have you up & running on the basics.
  • Model Analysis – World Dynamics
    This video walks through a critique of the World model that kicked off the Limits to Growth debate, starting with Forrester’s World Dynamics, followed by World3 and the Limits to Growth and many subsequent works. The purpose of this video is not to discuss the mapping of the world models to the real world, though that ...
  • Running models with Vensim PLE and the Model ReaderRunning models with Vensim PLE and the Model Reader
    A brief tutorial on running models with Vensim PLE and the Vensim Model Reader.
  • Causal Tracing in VensimCausal Tracing in Vensim
    A tutorial on Causal Tracing™ – following the chain of causality through a model for insight and debugging.
  • Lookups in VensimLookups in Vensim
    A tutorial on building and using lookups (table functions) in Vensim models.
  • Building a Simple Vensim ModelBuilding a Simple Vensim Model
    A quick tutorial on building and running a new Vensim model.
  • How to create web simulations with Vensim using Forio SimulateHow to create web simulations with Vensim using Forio Simulate
    Vensim is ideally suited for creating sophisticated system dynamics simulation models, and Ventana UK’s Sable tool provides desktop deployment, but how can modelers make the insights from models accessible via the web? Forio Simulate is a web hosting application that makes it easy for modelers to integrate Vensim models into end-user web applications. Webinar with ...