TAM / SAM / SOM Market Sizing Framework

Build a full TAM / SAM / SOM market sizing analysis for my startup. Use these inputs: **Company / Product:** {&{COMPANY_AND_PRODUCT}} **Core Customer Segment:** {&{CUSTOMER_SEGMENT}} (e.g., mid-market B2B SaaS companies with 50–500 employees) **Geography (initial):** {&{INITIAL_GEOGRAPHY}} **Price Point:** {&{PRICE_POINT}} (e.g., $299/month per seat) **Current GTM Motion:** {&{GTM_MOTION}} (e.g., product-led growth + inside sales) **Industry Category:** {&{INDUSTRY_CATEGORY}} --- Deliver the following, in order: **Step 1 — Tops-Down TAM** Use publicly available industry report logic (cite the methodology, e.g., 'per Gartner's 2024 IT Spend report framework'). State the global TAM. Then filter to the relevant segment and geography to reach a realistic TAM for this business. **Step 2 — Bottoms-Up TAM** Calculate: (Estimated number of target customers globally) × (ACV or annual spend per customer). Show each variable and its source/assumption. **Step 3 — Reconcile & State TAM** Compare both figures. If they diverge significantly, explain why. State the TAM you recommend using and why. **Step 4 — SAM** Filter TAM by: (a) geographies reachable in 18 months, (b) customer segments the current product serves today, (c) channels the GTM motion can reach. State SAM with a 1-paragraph rationale. **Step 5 — SOM (3-Year)** Based on current team size, GTM capacity, and funding trajectory, what is a realistic 3-year serviceable obtainable market? Tie this to a specific market share %. Flag the key constraint on capture rate. **Step 6 — Summary Table** Produce a markdown table with columns: Metric | Value | Methodology | Key Assumption | Confidence Level (High/Medium/Low) **Step 7 — Investor Narrative Paragraph** Write a 3–4 sentence paragraph summarizing the market opportunity as it would appear on a pitch deck slide.