Glossary/B2B & Growth/Total Addressable Market (TAM)
B2B & Growth
Total Addressable Market (TAM)
The total revenue opportunity if a product captured 100% of its market, often paired with SAM and SOM.
By Brandon Mina·CEO, BrandPilot AI·Updated November 2026
Short answer
Total addressable market (TAM) is the total revenue opportunity available if a product captured 100% of its market. It is often paired with serviceable available market (SAM) and serviceable obtainable market (SOM), which narrow the estimate to realistic segments and share. Investors and planners use TAM to gauge a business's potential scale.