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← Glossary
Growth & Go-to-Market

TAM / SAM / SOM

Also: Total Addressable Market

Nested market sizes — total addressable (TAM), serviceable (SAM) and the share you can realistically win (SOM).

Why it matters

Investors discount a giant top-down TAM; a credible bottom-up SOM you can actually reach is far more persuasive.

Hear it from people who've done it

Get the real-world version of "TAM / SAM / SOM" drawn from hundreds of conversations with founders and investors.

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Go deeper

Episodes on Sales & GTM

What Makes a Founder Worth Backing at Pre-Seed? With Ilana Elbaz | GTM at Deel

First Cheque with Cheryl Mack & Maxine Minter · 19 July 2026

What Makes a Founder Worth Backing at Pre-Seed? With Ilana Elbaz | GTM at Deel
How Do You Sell Software to an Industry That Won't Change? Mitchell Baker on Claimstack

Pick My Brain with Alan Jones · 14 July 2026

How Do You Sell Software to an Industry That Won't Change? Mitchell Baker on Claimstack
Nathan Hill: Managing a Team of Agents Now — What's That Worth?

Building Tech Teams with James MacDonald · 13 July 2026

Nathan Hill: Managing a Team of Agents Now — What's That Worth?
All Sales & GTM episodes →
Related terms

Ideal customer profile

A precise description of the customer you serve best — the one who buys fastest, stays longest and pays most.

Go-to-market

How you reach customers and turn them into revenue — the channels, motion and pricing that get the product sold.

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