Can I use this for a completely new market category?

Yes, the skill includes a Value Theory methodology specifically designed for disruptive innovations where existing market data may not yet exist.

Why does this skill recommend a bottom-up approach?

Investors find bottom-up calculations more credible because they are built from granular customer data and pricing rather than broad, often inflated industry reports.

What is the difference between TAM, SAM, and SOM?

TAM is the total global 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.

How do I ensure my market sizing is realistic?

The skill provides triangulation techniques to compare results across multiple methodologies, helping you identify red flags like overly aggressive capture rates.

Market Sizing Analysis

Name: Market Sizing Analysis
Author: wshobson

bywshobson

•

25,583

Marketing Automation

Calculates comprehensive TAM, SAM, and SOM market sizing using top-down, bottom-up, and value theory methodologies.

About

The Market Sizing Analysis skill provides a rigorous framework for startups and businesses to quantify their market opportunity. It guides users through the Three-Tier Market Framework (TAM, SAM, SOM) and facilitates cross-validation using industry reports, customer-centric bottom-up calculations, and value-based pricing models. This skill is ideal for founders preparing pitch decks, product managers validating new features, or analysts assessing competitive landscapes within the Claude Code environment.

Key Features

Investor-Ready Validation: Identifies red flags in assumptions and provides defensible logic for fundraising.
Data Source Guidance: Recommends specific industry reports, government statistics, and academic sources for reliable inputs.
Triangulation Methodology: Cross-check results using top-down, bottom-up, and value theory approaches for maximum accuracy.
Industry-Specific Templates: Specialized logic for SaaS, Marketplaces, B2B Services, and Consumer markets.
Three-Tier Framework: Calculate Total Addressable, Serviceable Available, and Serviceable Obtainable Market.
25,583 GitHub stars

Use Cases

Creating realistic 3-5 year revenue projections based on Serviceable Obtainable Market (SOM).
Validating the commercial viability of a new product category or geographic expansion.
Developing a credible market opportunity slide for a venture capital pitch deck.

About

Key Features

Investor-Ready Validation: Identifies red flags in assumptions and provides defensible logic for fundraising.
Data Source Guidance: Recommends specific industry reports, government statistics, and academic sources for reliable inputs.
Triangulation Methodology: Cross-check results using top-down, bottom-up, and value theory approaches for maximum accuracy.
Industry-Specific Templates: Specialized logic for SaaS, Marketplaces, B2B Services, and Consumer markets.
Three-Tier Framework: Calculate Total Addressable, Serviceable Available, and Serviceable Obtainable Market.
25,583 GitHub stars

Use Cases

Creating realistic 3-5 year revenue projections based on Serviceable Obtainable Market (SOM).
Validating the commercial viability of a new product category or geographic expansion.
Developing a credible market opportunity slide for a venture capital pitch deck.