tam-calculator

Calculate TAM, SAM, and SOM using top-down, bottom-up, and value-theory methodologies.

47|11|Updated Nov 26, 2025
One-click install
npx skills add https://github.com/majesticlabs-dev/majestic-marketplace --skill tam-calculator
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: tam-calculator
Source: https://github.com/majesticlabs-dev/majestic-marketplace/tree/main/plugins/majestic-company/skills/fundraising/tam-calculator
Command: npx skills add https://github.com/majesticlabs-dev/majestic-marketplace --skill tam-calculator

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Delivers credible TAM, SAM, SOM sizing using top-down, bottom-up, and value-theory approaches with data sources suitable for investor meetings.

Core Features & Use Cases

  • Three Methodologies: Top-down, Bottom-up, and Value-Theory with documented sources.
  • TAM → SAM → SOM Funnel: clear progression and assumptions.
  • Investor-Ready Output: executive summary and presentation-ready reports.

Quick Start

Provide product, geography, and pricing; I’ll calculate TAM/SAM/SOM and present a concise investor-ready report.

Frequently Asked Questions about tam-calculator

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

FAQPage Schema
How do I calculate TAM, SAM, and SOM for my startup?▼

TAM (Total Addressable Market), SAM (Serviceable Addressable Market), and SOM (Serviceable Obtainable Market) are calculated using three methodologies: top-down (starting from total market size), bottom-up (building from unit economics), and value-theory (pricing-based approaches). Provide your product, geography, and pricing to generate an investor-ready analysis with transparent calculations and cited data sources.

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

Top-down sizing starts with total industry revenue and applies market share percentages downward. Bottom-up sizing builds from customer units, price per unit, and addressable segments upward. This Skill applies both methods alongside value-theory approaches and triangulates results to validate market estimates with credible sources for investor presentations.

Can I use TAM/SAM/SOM sizing for investor meetings?▼

Yes. This Skill produces investor-ready TAM/SAM/SOM analyses with executive summaries, transparent assumptions, explicit inputs, source citations, and clearly structured output formats designed for VC and startup fundraising contexts.

What data do I need to provide for market sizing?▼

Provide your product description, target geography or regions, and pricing strategy. The Skill applies top-down, bottom-up, and value-theory methodologies using credible data sources to calculate TAM, SAM, and SOM with documented assumptions and source citations.

How does this approach handle market sizing uncertainty?▼

The Skill triangulates across three independent methodologies—top-down, bottom-up, and value-theory—to validate estimates and surface disagreements. Clear documentation of inputs, assumptions, and data sources builds credibility for investor review and reveals where market estimates diverge.