Serviceable Obtainable Market (SOM)
Serviceable Obtainable Market (SOM) is the share of your serviceable market that you can realistically capture in the near term given competition, capacity, and go-to-market resources.
In depth
SOM takes SAM one step further by accounting for the friction of actually winning customers: competitors already holding share, your sales capacity, brand awareness, and how fast your channels can scale. It is usually expressed as a percentage of SAM grounded in current win rates and pipeline velocity, which makes it the most operationally honest of the three market-sizing figures. Teams use SOM to set revenue targets, headcount plans, and quota that reflect what is achievable this year rather than in theory.
The biggest pitfall is confusing SOM with SAM and budgeting as if the whole serviceable market were within reach, which produces missed targets and burned cash. In a quiz-funnel context, SOM is where lead qualification earns its keep: by scoring and routing only the prospects you can realistically close, your funnel concentrates limited sales attention on the obtainable segment instead of spreading it thin across everyone who fits on paper.
Example in practice
Frequently asked questions
How is SOM calculated from SAM?
SOM is typically expressed as a realistic percentage of SAM based on your current win rate, sales capacity, and competitive position. It answers what you can actually capture this period, not over the product's lifetime.
Why is SOM more useful than TAM for planning?
SOM reflects execution constraints like competition and capacity, so it sets achievable targets and quotas. TAM and SAM are useful for context, but SOM is what you should budget and staff against.
How does SOM influence lead routing in a funnel?
Because SOM is the winnable segment, your quiz scoring should give the highest weight to prospects who match it. This concentrates limited sales time on deals that can realistically close in the current period.