System dynamics software

There are a small number of companies that produce system dynamics simulation software.

Each of these products are structurally similar - they are based on the essential resource and feedback nature of system dynamics itself.  However, in practice each one of the tools has widely different characteristics, capabilities and target audiences. And widely different prices and costs in use. 

Here are the main contenders:

iThink and STELLA - from isee systems inc

Powersim - from Powersim Software AG

Vensim - from Ventana Systems Inc

MyStrategy - from Strategy Dynamics Ltd

Cognitus has used all these products at various times.  Each has its own strengths and weaknesses. In choosing a toolset it is very important to consider how it is to be used. 

In future, Cognitus will publish comparative reviews of system dynamics software - and we welcome informed comment at any time.