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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

The Lazy Sales Tactic That's Hurting Your Business | Ben King from Aviato Consulting

Pick My Brain with Alan Jones · 18 April 2026

The Lazy Sales Tactic That's Hurting Your Business | Ben King from Aviato Consulting
The Right and Wrong Way to Use AI Agents in Customer Service with Jason Maynard, CTO of Zendesk

In The Blink Of AI with Georgie Healy · 20 March 2026

The Right and Wrong Way to Use AI Agents in Customer Service with Jason Maynard, CTO of Zendesk
How to Turn Happy Customers Into Your Best Sales Channel

Pick My Brain with Alan Jones · 18 March 2026

How to Turn Happy Customers Into Your Best Sales Channel
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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