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The Internet Compass

Startup & SaaS

TAM / SAM / SOM Calculator

Bottom-up sizing — customer count times contract value — is far more credible to investors than a top-down analyst-report figure.

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TAM (Total Addressable Market)
$2,400,000,000
SAM (Serviceable Addressable Market)
$600,000,000
SOM (Serviceable Obtainable Market)
$30,000,000

How it works

  1. 1Estimate total potential customers and average contract value
  2. 2Narrow to your serviceable and realistically obtainable share
  3. 3See TAM, SAM and SOM

Who this is for

  • Building the market-sizing slide for a pitch deck
  • Sanity-checking a top-down market size claim
  • Internal planning on addressable opportunity