What problem does it solve? Estimating market opportunity for a startup or new venture is difficult without a structured methodology, and investors reject sizing claims that lack credible data sources and triangulation. This Skill provides a complete framework for calculating TAM, SAM, and SOM with defensible assumptions. ## Core Features & Use Cases - Three Sizing Methodologies: Apply top-down analysis from industry reports, bottom-up calculations from customer segments, and value theory based on willingness to pay. - Triangulation and Validation: Cross-check results across methodologies, validate against public company revenues, and detect red flags like oversized TAM or aggressive SOM. - Investor-Ready Presentation: Structure market sizing for pitch decks and business plans with documented sources, assumptions, and growth projections. - Use Case: A founder building an AI email marketing tool for e-commerce can follow the included SaaS example to compute a $539M North America TAM, narrow it to a $169M SAM, and present a defensible $8.5M Year 5 SOM to investors. ## Quick Start Ask the AI to calculate TAM, SAM, and SOM for your product idea using the bottom-up methodology, specifying your target customer segment, geography, and pricing.