Total addressable market, serviceable market, and the share you can realistically win — with the math visible, the way an investor wants to see it.
Everyone in the world/region who has the problem you solve.
Annual price × purchases per year.
Limited by geography, language, segment, channel, regulation.
Honest share vs competition. Early-stage: 1–10% is credible.
Your TAM/SAM/SOM result plus a copy-ready market-sizing slide with sourcing guidance.
Full market analysis with sourced numbers, competition, positioning and 36-month financials — from a short brief, in about 15 minutes. Free to start.
Build my full analysis free →| Term | Question it answers | Typical use |
|---|---|---|
| TAM — Total Addressable Market | If everyone who has this problem bought, what is the annual revenue? | Shows the ceiling; proves the pond is big enough. |
| SAM — Serviceable Addressable Market | How much of TAM can your product, geography and channel actually serve? | The honest arena you compete in. |
| SOM — Serviceable Obtainable Market | How much of SAM can you win in 3–5 years given competition? | The number your revenue plan must reconcile with. |
Investors discount "the market is $45B and we only need 1%". A bottom-up build — number of target customers × what each pays per year — forces every assumption into the open and survives due-diligence questions. Use top-down only as a sanity check on the bottom-up answer.
A payroll tool for US dental practices: ~130,000 practices (TAM count) × $2,400/year = TAM $312M. Serving only practices with 5+ staff on modern practice-management software (~40%) → SAM $125M. A credible 4% share in 4 years → SOM $5M ARR — which then has to match the customer-acquisition math in the plan.