Startup & Venture Basics Intermediate

Serviceable Addressable Market (SAM)

The portion of TAM a company can realistically target given its current product and reach.

Definition

SAM is the subset of the total addressable market that a company can actually serve with its current product, geographic reach, and go-to-market strategy. While TAM is the theoretical ceiling, SAM is the realistic playing field. Investors pay close attention to SAM because it represents near-term revenue potential.

Why it matters

A company might pitch a $10B TAM, but if their SAM is only $100M, the growth story is less compelling. SAM helps you assess whether the company can realistically grow large enough to make your equity valuable.

Example

An AI recruiting tool has a TAM of $5B (all hiring globally), but only works in English and targets tech companies with 100+ employees. The SAM is $800M.

Related terms

Total Addressable Market (TAM)
The total revenue opportunity if a product captured 100% of its target market.
Annual Recurring Revenue (ARR)
The annualized value of all active subscriptions or recurring contracts.
Product-Market Fit
When a product satisfies strong market demand and customers keep coming back.
Valuation Multiple
A ratio (like revenue multiple) used to estimate a company's worth relative to a financial metric.

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This definition is an educational summary. It is not legal, tax, or investment advice. Specific terms in your equity grant or company documents may differ.