SAM (Serviceable Addressable Market)
The portion of TAM that your product can actually serve based on geography, segment, and capabilities.
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Definition
Serviceable Addressable Market (SAM) is the subset of TAM that your product can realistically serve given its current capabilities, geographic reach, and target customer segment. It is a more practical measure of opportunity than TAM.
SAM accounts for real-world constraints: language, regulation, distribution channels, product features, and competitive positioning. A CRM tool built for real estate agents has a much smaller SAM than the total CRM market, but it may be better positioned to capture a larger share of that smaller market.
The relationship between TAM, SAM, and SOM helps founders and investors align on realistic expectations. A company targeting a $500M SAM with plans to expand into adjacent markets over time tells a compelling story if the initial market is large enough to build a meaningful business.
Why It Matters for Founders
SAM is more useful than TAM for actual business planning because it reflects what you can realistically address today. It helps set realistic revenue targets, guides go-to-market strategy, and prevents the common mistake of spreading resources too thin across a market that is too broad.
Investors appreciate founders who can articulate their SAM clearly — it shows market understanding and strategic clarity. A founder who says "our TAM is $50B" without qualifying the SAM is less credible than one who says "our TAM is $50B, our SAM is $3B (English-speaking SMBs), and we plan to capture 5% in 5 years."
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Formula
SAM = TAM filtered by your product capabilities, geography, and target segmentReal-World Example
If the global project management TAM is $10B, but you only serve English-speaking SMBs in North America, your SAM might be $1.2B.
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Frequently Asked Questions
What is SAM?+
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