Market Sizing Analysis
FreeCalculate market opportunities using proven methodologies.
Free · Opens the source repo
What Market Sizing Analysis does
The Market Sizing Analysis skill provides a structured approach to determining the Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) for various business opportunities. This skill is particularly useful for entrepreneurs and business analysts who need to assess market potential and create data-driven strategies for startups. By employing three distinct methodologies—top-down, bottom-up, and value theory—users can gain a comprehensive understanding of market dynamics and revenue potential.
The top-down analysis leverages existing industry reports to provide a high-level view of the market landscape, making it ideal for established markets. In contrast, the bottom-up approach builds insights from specific customer segments, offering a granular perspective that is especially valuable for new or niche markets. Lastly, the value theory methodology focuses on estimating potential revenue based on customer willingness to pay, which is crucial for innovative products that may not fit into existing market categories.
This skill is designed for users who are involved in market research, business planning, or startup fundraising. It equips them with the tools necessary to validate market opportunities and develop investor-ready analyses. The detailed documentation and examples included in the skill help users navigate through complex market sizing tasks, ensuring they can apply the methodologies effectively in their own contexts.
By using this skill, users can create informed projections that support strategic decision-making and enhance their business plans, ultimately aiding in successful fundraising efforts and market entry strategies.
When to use it
Use this skill when you need to size markets, validate business opportunities, or prepare for investor pitches.
When not to use it
This skill may not be suitable for users looking for quick, simplistic market assessments without detailed analysis.
What you can build with it
Startup Business Plan
Use this skill to calculate market sizes and prepare a comprehensive business plan for your startup, ensuring you have a solid foundation for your strategy.
Investor Pitch Preparation
Leverage the methodologies to create a compelling market analysis that can be presented to potential investors, demonstrating the viability of your business opportunity.
Market Research for New Products
Apply the skill when researching new product categories to validate market potential and customer willingness to pay, guiding your product development strategy.
How to install Market Sizing Analysis
View source1. Install with the skills CLI
npx skills add wshobson/agents/market-sizing-analysis --agent claude-code2. Or install it manually
Download the skill folder and drop it into ~/.claude/skills/ for all projects, or .claude/skills/ to scope it to one repo. Restart Claude Code so it picks up the new skill.
Anthropic's agentic coding CLI, and the reference implementation of Agent Skills. Drop a skill folder into ~/.claude/skills and Claude Code loads it automatically whenever a task matches the skill's description. Claude Code docs
Inside SKILL.md
Written by wshobsonMarket Sizing Analysis
Comprehensive market sizing methodologies for calculating Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) for startup opportunities.
Overview
Market sizing provides the foundation for startup strategy, fundraising, and business planning. Calculate market opportunity using three complementary methodologies: top-down (industry reports), bottom-up (customer segment calculations), and value theory (willingness to pay).
Core Concepts
The Three-Tier Market Framework
TAM (Total Addressable Market)
- Total revenue opportunity if achieving 100% market share
- Defines the universe of potential customers
- Used for long-term vision and market validation
- Example: All email marketing software revenue globally
SAM (Serviceable Available Market)
- Portion of TAM targetable with current product/service
- Accounts for geographic, segment, or capability constraints
- Represents realistic addressable opportunity
- Example: AI-powered email marketing for e-commerce in North America
SOM (Serviceable Obtainable Market)
- Realistic market share achievable in 3-5 years
- Accounts for competition, resources, and market dynamics
- Used for financial projections and fundraising
- Example: 2-5% of SAM based on competitive landscape
When to Use Each Methodology
Top-Down Analysis
- Use when established market research exists
- Best for mature, well-defined markets
- Validates market existence and growth
- Starts with industry reports and narrows down
Bottom-Up Analysis
- Use when targeting specific customer segments
- Best for new or niche markets
- Most credible for investors
- Builds from customer data and pricing
Value Theory
- Use when creating new market categories
- Best for disruptive innovations
- Estimates based on value creation
- Calculates willingness to pay for problem solution
Detailed patterns and worked examples
Detailed pattern documentation lives in references/details.md. Read that file when the navigation tier above is insufficient.
Frequently asked questions about Market Sizing Analysis
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