What is Serviceable Addressable Market (SAM)?

Serviceable Addressable Market (SAM) is the portion of the Total Addressable Market that your specific product can realistically serve. It strips out the customers you can't reach — the wrong country, the wrong size, the wrong language, the wrong segment.

If TAM is everyone who could theoretically use a product like yours, SAM is everyone who fits what you actually sell, how you sell it, and where. It's a more honest number and the one that should anchor your planning.

How to find your SAM

Start with TAM and apply filters that reflect reality. If your software is English-only and sold to companies with 50+ employees in North America, your SAM excludes everyone who doesn't match those constraints.

Each filter should map to a real limit of your business today — not a guess about the future. As you expand into new regions or segments, your SAM grows with you.

• Filter by geography you can legally and practically sell into.
• Filter by customer size, industry, or use case your product actually fits.
• Filter by channel — who you can realistically reach with your go-to-market.

Why SAM matters for validation

SAM is the number that tells you how much room you have to grow before you must change the product or expand to new markets. It keeps planning grounded: a business can be very successful within a modest SAM, and a huge TAM means little if your serviceable slice is tiny.