How does the skill help validate my market assumptions?

It provides triangulation techniques to compare results from different methodologies and identifies common red flags, such as overly aggressive capture rates or inconsistencies between top-down and bottom-up results.

What is the difference between TAM, SAM, and SOM in this skill?

TAM is the total global revenue opportunity; SAM is the portion of that market targetable with your current product and geography; and SOM is the realistic market share you can capture within 3-5 years.

Can I use this for disruptive products in new categories?

Yes, the skill includes a 'Value Theory' methodology specifically designed for disruptive innovations where established industry reports and historical market data may not yet exist.

Which market sizing methodology is best for startups?

The Bottom-Up methodology is generally preferred by investors because it is more granular and defensible, building the market size from specific customer segments and pricing data.

Market Sizing Analysis

Name: Market Sizing Analysis
Author: rmyndharis

byrmyndharis

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105

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Productivity & Workflow

Performs comprehensive market sizing calculations using TAM, SAM, and SOM frameworks for business strategy and startup valuation.

This skill provides a structured framework for conducting rigorous market sizing analysis, essential for startup fundraising, strategic planning, and business validation. It guides users through three distinct methodologies—Top-Down, Bottom-Up, and Value Theory—to calculate Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM). By leveraging industry-standard best practices and validation techniques, the skill helps teams transform raw data into credible, defensible market opportunity assessments suitable for investor presentations and go-to-market planning.

Key Features

01Step-by-step guidance for data source identification and information gathering

02105 GitHub stars

03Multi-methodology TAM/SAM/SOM framework (Top-Down, Bottom-Up, and Value Theory)

04Structured presentation formats tailored for investor pitches and strategic roadmaps

05Industry-specific calculation templates for SaaS, Marketplaces, and B2B services

06Rigorous validation and triangulation techniques to ensure data credibility

Use Cases

01Validating business viability for new product launches or geographic expansions

02Calculating market opportunity for startup fundraising rounds and investor decks

03Conducting competitive landscape analysis and realistic market share projections

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add rmyndharis/antigravity-skills market-sizing-analysis

For use in Claude.ai and ChatGPT

Download Skill