Glossary · Market sizing
TAM (total addressable market)
If everyone who could possibly buy your product did, how big could revenue be? It is a ceiling thought experiment, not a sales forecast.
Related: SAM (serviceable addressable market) · SOM (serviceable obtainable market) · Pitch deck
A bit more nuance▾
- Top-down TAM from industry reports is easy and often wrong for you.
- Bottom-up TAM uses real price × plausible customer count.
Go deeper▾
Discussion questions▾
- Who is honestly **not** in your TAM and why?
- What would shrink your TAM to something still exciting?
Educational reference only — not legal, tax, or investment advice. Terms vary by country and deal; ask a qualified professional when it matters.