market-sizing

Estimate TAM, SAM, and SOM with top-down and bottom-up methods.

Updated Apr 1, 2026
One-click install
npx skills add https://github.com/hpsgd/turtlestack --skill market-sizing-hpsgd
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: market-sizing
Source: https://github.com/hpsgd/turtlestack/tree/main/plugins/research/analyst/skills/market-sizing
Command: npx skills add https://github.com/hpsgd/turtlestack --skill market-sizing-hpsgd

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Market sizing is often a guess; this Skill provides a structured, transparent methodology to estimate TAM, SAM, and SOM with traceable inputs for business planning and investment decisions.

Core Features & Use Cases

  • Top-down estimates anchored by credible analyst data
  • Bottom-up calculations from addressable customers and pricing
  • Explicit documentation of assumptions, sources, and growth projections
  • Use Case: Build a defensible market size for a business plan or investor pitch.

Quick Start

Define the market by specifying the buyer, purchase unit, geography, and time horizon, then generate top-down and bottom-up estimates with explicit methodology.

Frequently Asked Questions about market-sizing

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

FAQPage Schema
How do I calculate TAM, SAM, and SOM for an investor pitch?

Estimate market size by combining top-down analyst data with bottom-up calculations from addressable customers and pricing. This approach requires defining the buyer, geography, and time horizon to produce defensible TAM, SAM, and SOM figures.

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

Top-down market sizing anchors estimates in credible analyst data, while bottom-up sizing calculates from addressable customers and pricing. This Skill uses both methods to generate traceable TAM, SAM, and SOM figures.

What inputs do I need to estimate market size using top-down and bottom-up methods?

Estimating market size requires an explicit market definition specifying the buyer, purchase unit, geography, and time horizon, plus documented data sources to support your top-down and bottom-up calculations and growth-rate projections.

Can I use this market sizing methodology for business planning and investment decisions?

Yes, this structured market sizing methodology is applicable to business plans, pitches, and investment decisions, providing defensible TAM, SAM, and SOM figures with traceable inputs and documented assumptions.

Why do my market size estimates lack credibility with investors?

Market size estimates lack credibility when treated as guesses. You can build defensible figures by documenting explicit assumptions, using credible analyst data for top-down estimates, and grounding bottom-up calculations in addressable customer pricing.