{"slug":"market-size","name":"Market Size (TAM · SAM · SOM)","category":"mba","tags":["strategy","growth"],"tagline":"Bottom-up market sizing with a built-in plausibility check.","endpoint":"https://xearno.tools/api/v1/tools/market-size","page":"https://xearno.tools/t/market-size","description":"Builds TAM, SAM, and SOM bottom-up from customer count and revenue per account, then sanity-checks whether the implied customer acquisition is actually plausible — the check most pitch decks skip.","inputSchema":{"type":"object","properties":{"accounts":{"description":"Potential customers in market Total count of businesses/people who could conceivably buy this category.","type":"number","minimum":1,"default":200000},"arpa":{"description":"Annual revenue per customer","type":"number","minimum":0.01,"default":1200},"samPct":{"description":"Serviceable share (%) Share you can actually reach: your segment, geography, language, channel.","type":"number","minimum":0.1,"maximum":100,"default":40},"somPct":{"description":"Obtainable share of SAM (%) Realistic share you win in ~3–5 years given competition.","type":"number","minimum":0.01,"maximum":100,"default":5}},"required":[],"additionalProperties":false},"methodology":["Bottom-up: TAM = potential customers × annual revenue per customer. SAM = TAM × serviceable share. SOM = SAM × obtainable share.","The customers-per-month plausibility check divides SOM customers over a 48-month ramp — a crude but revealing test of whether the go-to-market can physically deliver the claimed share.","ARPA choice dominates this model: use what customers pay for the *category* today (or a defensible willingness-to-pay), not your aspirational price."],"usage":"POST https://xearno.tools/api/v1/tools/market-size with a JSON body matching inputSchema."}