The primary competitor to Quantrix is the spreadsheet. This is the predominant quantitative desktop thinking tool used today for modeling / forecasting / analysis. Other potential competitors include a number of specialized applications for specific modeling activities such as tax planning, estate planning, business valuation, etc. However, these tools are designed to perform a certain modeling task in a certain way. When the user’s requirements fall outside the scope of design offered by these applications, the fallback is usually a spreadsheet.
At an enterprise level, OLAP and BI tools might be considered competitors to Quantrix. However, spreadsheets are often used as a front end to these applications and in that respect, Quantrix can be a better fit (and provide a much more intuitive workspace) because of its multi-dimensional architecture.
I hope this helps to answer your question. Please let us know if you have any further questions as you proceed with your evaluation.