Market Sizing Analysis
This walks you through calculating TAM, SAM, and SOM using three methodologies: top-down from industry reports, bottom-up from customer segments, and value theory based on willingness to pay. You get formulas, step-by-step processes, and specific guidance on when to use each approach. Good for startup planning, pitch decks, or anytime you need defensible market size numbers. The bottom-up methodology is what investors actually care about, and the skill includes realistic capture rates and validation techniques to cross-check your numbers. It's comprehensive but you'll still need to do the research legwork yourself.
- skills.sh installs
- 218
- GitHub stars
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- last updated
- Jun 3, 2026
Install
$ npx -y skills add sickn33/antigravity-awesome-skills --skill market-sizing-analysis --agent claude-codeInstalls into .claude/skills of the current project.
Files
Market Sizing Analysis
Comprehensive market sizing methodologies for calculating Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) for startup opportunities.
Use this skill when
- Working on market sizing analysis tasks or workflows
- Needing guidance, best practices, or checklists for market sizing analysis
Do not use this skill when
- The task is unrelated to market sizing analysis
- You need a different domain or tool outside this scope
Instructions
- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
- Use the examples below; no separate implementation playbook is bundled.
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
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- Repository
- github.com/sickn33/antigravity-awesome-skills
- First seen
- Jun 3, 2026
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