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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.

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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

The AI Nomad: How Nathan Clark Switches Tools Without Losing the Work

Operator AI with Zachary King · 9 October 2026

The AI Nomad: How Nathan Clark Switches Tools Without Losing the Work
Why You Should Think Global From Day One: Ilana Elbaz on Deel

Pick My Brain with Alan Jones · 19 August 2026

Why You Should Think Global From Day One: Ilana Elbaz on Deel
How Do You Grow a Marketplace When Both Sides Are Slow? Ishan Dan on RegenX

Pick My Brain with Alan Jones · 12 August 2026

How Do You Grow a Marketplace When Both Sides Are Slow? Ishan Dan on RegenX
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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