Back to Skills
Competitive

Market Sizing Calculator

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

Now includes the former Market Sizing Analyzer.

/market-sizing

Time Saved

6-10 hrs → 1 hr

Compared to doing it manually

Slash Command

/market-sizing

Type this in Claude to run the skill

The Problem

TAM/SAM/SOM numbers are often pulled from thin air or copied from analyst reports without validation. Investors and execs see through weak market sizing instantly.

What You Get

  • ✓Dual methodology (top-down + bottom-up)
  • ✓Triangulated estimates with confidence levels
  • ✓Assumption log with sources
  • ✓Sensitivity analysis
  • ✓Risk factors documented
  • ✓Investor-ready format

How to use this skill

  1. 1Start your free trial — every skill is included
  2. 2Set up your company context with /welcome
  3. 3Type /market-sizing in Claude to run the skill

Best For

Business casesInvestor pitchesNew market entryProduct expansion

Related Skills

Win/Loss Analyzer

/win-loss-analysis

Analyze win/loss patterns to understand why you are winning and losing deals.

Competitive Profile Builder

/competitive-profile-builder

Create comprehensive competitor analysis using Gibson Biddle's DHM framework with strategic positioning insights.

Frequently Asked Questions

TAM (Total Addressable Market) = everyone who could use your product. SAM (Serviceable Addressable Market) = the portion you can reach. SOM (Serviceable Obtainable Market) = the portion you can realistically capture.

Two approaches: top-down (start with industry data, narrow down) or bottom-up (count potential customers × price). Bottom-up is usually more accurate. Triangulate with both methods.

Start free trial