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🦀 ClawHub

Market Sizing — TAM/SAM/SOM Calculator

by @1kalin

Calculate defensible TAM, SAM, and SOM market sizes using top-down and bottom-up methods with source citations for pitches and business cases.

Versionv1.0.0
Downloads1,003
Installs1
#clawhub
TERMINAL
clawhub install afrexai-market-sizing

📖 About This Skill

Market Sizing — TAM/SAM/SOM Calculator

Build defensible market sizing for any product, pitch deck, or business case. Top-down and bottom-up methodologies combined.

What You Get

  • TAM (Total Addressable Market) — entire market if you had 100% share
  • SAM (Serviceable Addressable Market) — segment you can actually reach
  • SOM (Serviceable Obtainable Market) — realistic capture in 12-36 months
  • Bottom-up validation — unit economics × reachable customers
  • Source citations — government data, industry reports, public filings

    • How to Use

    Tell me your product/service and target customer. I'll build the full sizing.

    Example prompts:

  • "Size the market for AI-powered contract review for mid-market law firms in the US"
  • "TAM/SAM/SOM for a SaaS helpdesk targeting e-commerce brands doing $1M-$50M revenue"
  • "Market size for automated bookkeeping for UK SMBs"

    • Methodology

    Top-Down

    1. Start with total industry revenue (cite source) 2. Filter by geography, segment, company size 3. Apply technology adoption rates 4. Result = SAM

    Bottom-Up

    1. Count reachable customers (databases, directories, LinkedIn) 2. Multiply by realistic ACV (annual contract value) 3. Apply conversion rates at each funnel stage 4. Result = SOM

    Triangulation

    Compare top-down and bottom-up. If they're within 2-3x of each other, the sizing holds. If wildly different, investigate assumptions.

    Output Format

    ## Market Sizing: [Product/Service]
    TAM — $X.XB
    
[Total market calculation with sources]
    SAM — $XXM
    
[Filtered by geography + segment + tech adoption]
    SOM (12-month) — $X.XM
    
[Bottom-up: customers × ACV × conversion]
    Key Assumptions
    

  • [Assumption 1 + source]
    • 

  • [Assumption 2 + source]
    • Risks to Sizing
    

  • [What could make this smaller]
    • 

  • [What could make this bigger]
    •

    When to Use This

  • Pitch decks and investor presentations
  • Go-to-market strategy planning
  • New product feasibility analysis
  • Board presentations and business cases
  • Competitive positioning

    • Pro Tip

    Most founders oversize their TAM and undersize their SOM. Investors see through inflated numbers instantly. A tight, well-sourced $50M SAM beats a hand-wavy $10B TAM every time.

    Need the full business context pack for your industry? Browse AfrexAI Context Packs — pre-built agent configs for Fintech, Healthcare, Legal, SaaS, and 6 more verticals ($47 each).

    Calculate what AI automation could save your business: AI Revenue Leak Calculator