# Market Sizing

> Calculate TAM/SAM/SOM using both top-down and bottom-up approaches with clear assumption tracking. Use when: market size, tam sam som, market opportunity, addressable market.

- **Type:** Skill
- **Install:** `agentstack add skill-varunk130-claude-code-skills-market-sizing`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [varunk130](https://agentstack.voostack.com/s/varunk130)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [varunk130](https://github.com/varunk130)
- **Source:** https://github.com/varunk130/claude-code-skills/tree/main/skills/strategic-management/market-sizing

## Install

```sh
agentstack add skill-varunk130-claude-code-skills-market-sizing
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Market Sizing Calculator

Calculate TAM/SAM/SOM using both top-down and bottom-up approaches with clear assumption tracking.

## When to Use This Skill
- New product business cases
- Expansion into new markets or segments
- Investor/board presentations

## What You'll Need
- Clear definition of your market boundaries
- Industry data or reports (for top-down)
- Unit economics inputs (for bottom-up)

## Process

### Step 1: Check Your Context
Read context files for company, product, personas, and competitor data.

### Step 2: Define Market Boundaries
Define geography, customer segment, and use case boundaries.

### Step 3: Top-Down Analysis
Start with total market and narrow down using industry reports and public filings.

### Step 4: Bottom-Up Analysis
Build up from unit economics: potential customers x deal size x frequency.

### Step 5: Triangulate
Compare approaches. Aligned = high confidence. Divergent = investigate.

### Step 6: Document Assumptions
Every number gets a source or explicit assumption marker.

## Framework Reference

**TAM-SAM-SOM** with dual methodology:
- Top-down: Market reports - narrow to segment
- Bottom-up: Unit economics - multiply out
- Triangulation increases confidence

## Tips for Best Results
1. Keep context files updated
2. Be conservative - optimistic estimates lose credibility
3. Show your work - transparent assumptions > black box
4. Multiple approaches - if they diverge, you're missing something

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [varunk130](https://github.com/varunk130)
- **Source:** [varunk130/claude-code-skills](https://github.com/varunk130/claude-code-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-varunk130-claude-code-skills-market-sizing
- Seller: https://agentstack.voostack.com/s/varunk130
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.