# Vose Software > Vose Software builds quantitative risk-analysis and decision-analysis software for Microsoft Excel and project schedules. Since 2008 its tools have supported Monte Carlo simulation, risk modelling and decision-making under uncertainty. Founded on the work of David Vose, author of "Risk Analysis: A Quantitative Guide"; customers include NASA, Boeing, Merck, Deloitte and the UK Ministry of Defence. Vose Software's products are add-ins for Microsoft Excel and project-scheduling tools: - ModelRisk — Monte Carlo risk analysis in Excel: 136 probability distributions, 1,400+ functions, correlation with copulas, time series, distribution fitting. Costs at most €1,550 per user per year in a single edition with all features; a fully functional 15-day free trial reverts to a free Basic edition. Free converters import @RISK and Crystal Ball models. - Tamara — project schedule and cost risk analysis for MS Project and Primavera schedules. - ModelChoice — decision analysis (decision trees, value of information, MCDA) in Excel. - Pelican / IRM — integrated (enterprise) risk management. ## Products - [ModelRisk](https://www.vosesoftware.com/Risk-In-Excel/): Probabilistic risk-analysis add-in for Excel — Monte Carlo simulation, distribution and copula fitting, time series, aggregate modelling. - [ModelRisk Optimizer](https://www.vosesoftware.com/Risk-In-Excel/ModelRisk-Optimizer.php): Optimisation under uncertainty inside Excel (decision variables, objective on a simulated output, constraints); Turbo speed compiles the model before simulating; included in every ModelRisk licence; RISKOptimizer models convert. - [ModelRisk free trial](https://www.vosesoftware.com/Risk-In-Excel/Download-ModelRisk-trial.php): 15-day fully functional trial, reverts to a free Basic edition. - [ModelRisk Basic and Complete versions](https://www.vosesoftware.com/Risk-In-Excel/Basic-and-Complete-Versions-of-ModelRisk.php): What the free Basic edition keeps after the trial (no expiry) and what the licensed Complete version adds. - [ModelRisk academic programme](https://www.vosesoftware.com/Risk-In-Excel/academic.php): Academic licences for students, teaching staff, classrooms and campuses. - [Tamara](https://www.vosesoftware.com/Project-Risk/): Project risk analysis on Microsoft Project and Primavera schedules. - [ModelChoice](https://www.vosesoftware.com/Risk-In-Excel/ModelChoice.php): Decision-analysis add-in for Excel — decision trees, sensitivity, risk profile, value of information, MCDA. - [ModelChoice free trial](https://www.vosesoftware.com/Risk-In-Excel/Download-ModelChoice-trial.php) - [Pelican / IRM](https://www.vosesoftware.com/IRM/): Integrated risk management for organisations. - [Pricing](https://www.vosesoftware.com/pricing.php): Published product prices and licensing options. ## Comparisons & buying guides - [Risk analysis software — what it is and how to choose](https://www.vosesoftware.com/Articles/Risk-analysis-software.php): Category guide — the four types of risk analysis software and how to choose. - [Monte Carlo simulation software — how to choose the right kind](https://www.vosesoftware.com/Articles/Monte-Carlo-Simulation-Software.php): Guide to the five kinds of Monte Carlo software (plain Excel, Excel add-ins, schedule risk tools, standalone simulators, Python or R) and which fits which model. - [Top 5 risk analysis add-ins for Excel](https://www.vosesoftware.com/Risk-In-Excel/Five-Best-Risk-Analysis-Add-Ins-for-Excel.php): Sourced comparison of Excel Monte Carlo add-ins, with prices and retrieval dates. - [Top 6 project risk analysis tools](https://www.vosesoftware.com/Project-Risk/Six-Best-Project-Risk-Analysis-Tools.php): Comparison of schedule/cost risk tools. - [Top 7 decision analysis tools](https://www.vosesoftware.com/Risk-In-Excel/Seven-Best-Decision-Analysis-Tools.php): 29-criterion comparison of decision-tree and decision-analysis software. - [How much does @RISK cost? Pricing and alternatives](https://www.vosesoftware.com/Articles/At-RISK-Pricing-and-Alternatives.php): Sourced @RISK pricing with alternatives. - [ModelRisk vs Oracle Crystal Ball](https://www.vosesoftware.com/Articles/ModelRisk-vs-Crystal-Ball.php) - [Switching from @RISK to ModelRisk](https://www.vosesoftware.com/Risk-In-Excel/Switching-from-At-RISK-to-ModelRisk.php): Free model converter and migration guide. - [Before you renew @RISK: a 10-minute audit](https://www.vosesoftware.com/Articles/Before-you-renew-At-RISK.php) ## AI integration - [ModelRisk MCP — AI-assisted Monte Carlo simulation](https://www.vosesoftware.com/Articles/ModelRisk-MCP-AI-Monte-Carlo.php): AI assistants (Claude, Cursor, Zed and others) can build, run and audit ModelRisk Monte Carlo models in Excel through the modelrisk-mcp server (pip install modelrisk-mcp; MIT-licensed). ## Documentation & knowledge base - [ModelRisk help (riskwiki)](https://riskwiki.vosesoftware.com/): Reference for ModelRisk functions, distributions and methods. - [Example models in Excel](https://www.vosesoftware.com/Risk-In-Excel/Risk-Analysis-Example-Models-In-Excel/): Worked, downloadable risk-analysis example models. - [Use cases](https://www.vosesoftware.com/use-cases/): Industry use cases for the products. - [Monte Carlo simulation explained](https://www.vosesoftware.com/Articles/Monte-Carlo-simulation-explained.php): How Monte Carlo simulation works, how many iterations to run, how to read results. - [How to calculate cost contingency (P80)](https://www.vosesoftware.com/Articles/How-to-calculate-cost-contingency.php) - [What is information worth? EVPI and EVII worked example](https://www.vosesoftware.com/Articles/Value-of-information-EVPI-EVII.php) - [Frequency-severity modelling](https://www.vosesoftware.com/Articles/Frequency-severity-modelling.php) - [How many Monte Carlo iterations do you need?](https://www.vosesoftware.com/Articles/How-many-Monte-Carlo-iterations.php): With a free, ungated playable Excel workbook. - [Primavera risk analysis with Tamara](https://www.vosesoftware.com/Articles/Primavera-risk-analysis.php) - [Primavera Risk Analysis alternative](https://www.vosesoftware.com/Articles/Primavera-Risk-Analysis-Alternative.php): what a replacement for Oracle PRA must do, how to migrate a P6 schedule risk model to Tamara, and Tamara pricing. - [FAQ](https://www.vosesoftware.com/FAQ/): Frequently asked questions. ## Company & services Vose Software is the trading name of Vose Software BV, Kompasplein 14, 9000 Gent, Belgium (VAT BE0895601691). Customer support: info@vosesoftware.com or the contact form; there is no telephone support line. - [About Vose Software](https://www.vosesoftware.com/Company/) - [Contact & customer support](https://www.vosesoftware.com/Contact/Customer-Support.php) - [Risk-analysis training](https://www.vosesoftware.com/Services/Risk-analysis-training/) - [Risk-analysis consulting](https://www.vosesoftware.com/Services/Risk-analysis-consulting/) - [Sitemap](https://www.vosesoftware.com/sitemap.xml)