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market-size

Computes TAM/SAM/SOM market sizing with top-down and bottom-up methods and competitive landscape analysis.

3.4k|487|Updated Jul 25, 2025
Search Tags:#market sizing#competitive landscape#CAGR#tAM sam som#bottom-up analysis#Venture capital#Market Research
One-click install
npx skills add https://github.com/davepoon/buildwithclaude --skill market-size
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: market-size
Source: https://github.com/davepoon/buildwithclaude/tree/main/plugins/venture-capital-intelligence/skills/market-size
Command: npx skills add https://github.com/davepoon/buildwithclaude --skill market-size

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

Estimating whether a market is large enough to justify venture investment requires gathering scattered market data, running both top-down and bottom-up sizing calculations, and mapping competitors, which is slow and error-prone when done manually.

Core Features & Use Cases

  • Dual-Method Market Sizing: Computes TAM, SAM, and SOM using both top-down (industry reports, CAGR) and bottom-up (customer count × ARPU) methods, then derives a consensus range.
  • VC Rule Checks: Automatically flags whether the TAM exceeds the $1B venture threshold and whether market CAGR indicates a strong tailwind or headwind.
  • Competitive Landscape & Tech Stack Analysis: Maps competitors with funding and estimated ARR, and classifies their technology stacks (frontend, backend, database, infrastructure).
  • Use Case: A founder preparing a pitch deck asks "what is the TAM for AI-powered legal document review" and receives a formatted report with consensus sizing ranges, 5-year projections, VC rule checks, and a competitor table.

Quick Start

Ask Claude to run a market sizing analysis for your company, for example by saying "size the market for my B2B SaaS product targeting US dental clinics at $200 per month".

Frequently Asked Questions about market-size

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I calculate TAM SAM SOM for a startup?▼

TAM SAM SOM calculation combines a top-down method (total market size multiplied by addressable and obtainable fractions) with a bottom-up method (potential customers multiplied by annual ARPU). This skill runs both methods via a Python script and derives a consensus range from the two results.

What is the difference between top-down and bottom-up market sizing?▼

Top-down sizing starts from industry report figures and applies addressable and obtainable fractions, while bottom-up sizing multiplies customer counts by annual revenue per customer. Using both methods and comparing them produces a more defensible consensus estimate.

What TAM size do venture capitalists require?▼

This skill flags TAM above $1B as venture-scale, $500M to $1B as tight for top-tier VC, and below $500M as likely too small for institutional VC. It also checks whether market CAGR exceeds 15% as a strong tailwind indicator.

Does this market sizing tool work without web search access?▼

No, the workflow depends on web searches to gather market size estimates, CAGR figures, customer counts, and competitor data. Without web search, you would need to manually supply these values in the market_inputs.json file before running the calculator script.

Why does tam_calculator.py report missing market_inputs.json?▼

The script requires market_inputs.json in the skill's output directory containing company, market category, top-down, and bottom-up inputs. This file is created during the earlier workflow step where Claude extracts data from web search results.

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