Library/Account Research & Buyer Intelligence/Industry & Vertical Context/Build a TAM/SAM/SOM Analysis with Growth Projections
TestedAccount Research & Buyer IntelligenceQuick Win (under 10 min)

Build a TAM/SAM/SOM Analysis with Growth Projections

Produces an investor-ready market sizing model with top-down and bottom-up methods, 5-year projections, and documented.

About this prompt

Generates a complete total addressable market analysis using both top-down and bottom-up approaches, including TAM/SAM/SOM breakdowns, five-year growth projections, external benchmark sourcing, and methodology documentation. Built for founders, sales directors, and sales managers who need defensible market sizing for board decks, fundraising, or territory planning. Use it when you need a structured analysis, not a back-of-envelope estimate.Market sizing done sloppily undermines credibility with investors and misaligns territory planning for the sales team. This prompt takes your industry or product category, what the product does, who the target customer is, and the relevant geography, then produces a dual-method TAM analysis — top-down using industry reports and bottom-up using addressable account counts — along with SAM and SOM definitions, five-year growth projections, and the assumptions and external benchmarks behind each number. Fill in YOUR INDUSTRY/PRODUCT with enough specificity to get segmentation that holds up to scrutiny; a vague input produces vague output. Use this over a manual model when you need a first draft fast and want the assumption structure laid out for you to stress-test. Practical tip: have a founder or CFO review the SOM assumptions specifically — that number is where most sizing analyses lose credibility.

The prompt

Help me with the following task. First, understand the overall goal in broad terms. Then get specific and complete each requirement carefully. Task: You are a McKinsey-level market analyst. Build a TA
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Variables to replace

YOUR INDUSTRY/PRODUCT | PRODUCT | TARGET CUSTOMER | GEOGRAPHY

How to run it

  1. Copy the prompt and paste it into Claude, ChatGPT, Gemini, or Copilot — it's tuned to run in any of them.
  2. Replace the variables — swap each bracketed token for your deal's specifics. The variables list above explains every field.
  3. Make it yours — run it, keep what's strong, and tighten your inputs on the next pass. The prompt improves with your context.

What good output looks like

Make it yours

StagePre-Prospecting
SeatSales Director, Founder-Led Seller, Sales Manager
DifficultyAdvanced
Time to valueQuick Win (under 10 min)
Works withAI-Agnostic
CategoryAccount Research & Buyer Intelligence
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