Data as of Jul 25, 2026 · Based on 2,718,867 AI responses across 9,511 prompts · See how Parse measures this
Guesstimate is a spreadsheet-like tool for modeling uncertain quantities, allowing you to enter ranges or simple numbers (for example '5 to 9') to make probabilistic estimates quickly. It uses Monte Carlo sampling to generate distributions and provide robust estimates of uncertain results. The platform offers free, unlimited public models and is open source, with documentation and community resources available.
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