Turn your spreadsheet
into a probability machine.
Upload any Excel model, tag your uncertain inputs as statistical distributions, and instantly see the full range of possible outcomes — not just a single best guess.
How it works
Three steps from model to insight
No new tools to learn. Your existing Excel model does the work — you just add the uncertainty.
Upload your model
Drop in any .xlsx file. Your formulas, structure, and logic stay exactly as-is — nothing to rebuild or migrate.
Tag your assumptions
Click any input cell and assign it a statistical distribution — Normal, Uniform, Triangular, and more. Set outputs the same way.
Run the simulation
We run thousands of scenarios through your model and show the full probability distribution of every output you care about.
Features
Probability built into your model
Everything you need to go from "our best estimate" to "here's the range and here's what's most likely."
Works with any .xlsx
Upload any existing Excel model — financial models, project plans, operational budgets. Your formulas run as-is, powered by a full spreadsheet engine.
Rich distribution library
Tag inputs as Normal, Uniform, Triangular, Log-Normal, and more. Each distribution comes with a plain-English description of when to use it.
Output histograms
See the full distribution of results for every output cell. Identify the most likely outcome, the upside, and the downside — all at once.
Thousands of scenarios
Run up to 10,000 Monte Carlo replications per simulation. Results arrive in seconds, not minutes.
Save your configurations
Name and save your assumption and output configurations. Reload them in seconds when you update your spreadsheet model.
View-only spreadsheet
The spreadsheet viewer is read-only — click any cell to tag it as an assumption or output, but your original file stays unchanged.
Use cases
Replace point estimates with probability
Anywhere you're using a single number in a spreadsheet, you can use a distribution instead.
Financial forecasting
Model revenue drivers as distributions instead of single numbers. See P10, P50, and P90 outcomes for profit — before you commit to a budget.
Project timelines
Replace task duration estimates with ranges. See the probability of on-time delivery before you promise a deadline to a client or executive.
Demand planning
Model sales volume as a distribution. See how demand uncertainty flows through to inventory, cost, and working capital.
Capital project appraisal
Run sensitivity analysis on cost estimates and revenue assumptions simultaneously. See which inputs drive the most variance in your ROI.
Risk assessment
Quantify the range of outcomes when multiple inputs are uncertain at once. Replace gut-feel risk registers with real probability estimates.
Pricing models
See how uncertainty in cost inputs or conversion rates affects your margins — and make pricing decisions with confidence intervals, not guesses.
Ready to see the full range of outcomes?
Upload your first spreadsheet in seconds — Pro plan required.
Get started free