Definitions // SAM
What is SAM?
SAM — Serviceable Addressable Market — is the slice of TAM you can actually sell into with your current product, geography, and channels. It is where ambition meets constraints.
Why SAM matters more than TAM
Investors skim TAM. They interrogate SAM. A $50B TAM with a $20M SAM is a lifestyle business wearing venture clothing. A tight SAM with a clear expansion path to a larger TAM is a story they can underwrite.
SAM sits between TAM and SOM. Full stack: TAM, SAM & SOM explained.
Typical SAM filters
- Geography and language (where you can sell and support).
- Customer segment (SMB vs mid-market vs enterprise).
- Product fit (features, compliance, integrations you ship today).
- Channel (self-serve, PLG, outbound, marketplace).
- Willingness to pay for this category.
How to keep SAM honest
Write the filters as a sentence: "English-speaking Series A–C SaaS companies with 20–200 engineers that already buy DevTools." Then count or estimate that population and multiply by a realistic ACV. If you cannot write the sentence, the SAM is not ready for a deck.
FAQ
- What does SAM stand for?
- SAM stands for Serviceable Addressable Market — the part of TAM that matches your product capabilities, target customer, language/geo, and sales channels.
- How is SAM different from TAM?
- TAM is the whole category. SAM applies real filters: who you can sell to now, where you operate, and what your product actually does. A global DevTools TAM might become a US/EU mid-market SAM.
- How do I estimate SAM?
- Start from TAM, then multiply by the share of customers in your geos, segments, and use cases — or build bottom-up from countable accounts × price. Document every filter.
Size your idea free
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