Market & Business
SAM
Serviceable Addressable Market — the portion of the TAM (Total Addressable Market) that a company can realistically target and serve given its current product, geography, and business model.
SAM (Serviceable Addressable Market) is the subset of the Total Addressable Market (TAM) that a company can realistically reach and serve. While TAM represents the theoretical maximum market opportunity, SAM represents the realistic target market — constrained by geographic reach, product capabilities, distribution channels, and business model.
For example, a SaaS company selling project management software might have: - TAM: $50B (entire project management software market globally) - SAM: $8B (English-speaking, mid-market companies with 50–500 employees using cloud tools) - SOM: $400M (10-year realistic market capture at current growth rates)
SAM is derived from TAM by applying realistic constraints. It's a more honest metric than TAM because it reflects what the company can actually pursue.
SAM analysis typically considers: target geographies, customer size (SMB vs. mid-market vs. enterprise), specific use cases the product supports, and distribution channel reach.
In Practice
A fintech startup builds expense management software for U.S. startups and SMBs with fewer than 500 employees. The TAM for global expense management is $10B. But the company only supports USD, focuses on tech companies, and lacks enterprise features — giving them a SAM of roughly $1.5B (U.S. tech SMBs with 10–500 employees).
Why It Matters
SAM matters because it's the realistic basis for revenue projections and market share goals. VCs use SAM to evaluate whether a company's current strategy leads to a fundable outcome — typically, SAM should be at least $1B for a Series A investment to justify venture returns. A large TAM with a tiny SAM means the company's current model doesn't actually access the large market it's claiming.
VC Beast Take
TAM/SAM/SOM analyses in pitch decks are almost always bottom-up theater. The numbers exist to pass the 'is this big enough?' test, not to provide genuine market insight. Good investors skip the TAM slide and ask about the actual customer cohort — who's buying, at what price, with what retention. A $100M SAM with 90% NRR is worth more than a $10B TAM with 60% GRR.