Startup Business Analyst Market Opportunity
Produce a TAM/SAM/SOM market opportunity report with bottom-up and top-down sizing before you commit to building.
Overview
startup-business-analyst-market-opportunity is an agent skill most often used in Idea (also Validate) that generates TAM/SAM/SOM market sizing with bottom-up and top-down methods.
Install
npx skills add https://github.com/sickn33/antigravity-awesome-skills --skill startup-business-analyst-market-opportunityWhat is this skill?
- 7-step interactive flow from segments through TAM, SAM, and 3–5 year SOM
- Bottom-up and top-down TAM with cross-check narrative
- SAM narrowing with explicit filter rationale
- Formatted report output; optional deep dive via resources/implementation-playbook.md
- 7-step market sizing process
- 3–5 year SOM horizon
Adoption & trust: 456 installs on skills.sh; 40.1k GitHub stars; 1/3 security scanners passed (skills.sh audits).
What problem does it solve?
You have a startup concept but no defensible numbers on how big the market is or what share you can realistically capture.
Who is it for?
Solo founders and indie builders who need investor- or roadmap-ready market framing before prototype or MVP scope locks in.
Skip if: Pure engineering tasks, unrelated domains, or situations where you already have audited third-party market reports and only need formatting.
When should I use this skill?
Working on market opportunity analysis, TAM/SAM/SOM, or needing checklists and best practices for startup market sizing.
What do I get? / Deliverables
You leave with a formatted market opportunity report including TAM, SAM, and SOM and the assumptions behind each layer.
- Formatted market opportunity report
- Documented TAM/SAM/SOM assumptions
Recommended Skills
Journey fit
Spans multiple journey phases - primary shelf plus alternate fits below.
Market sizing belongs on the Idea shelf as the first rigorous quant pass on whether a niche is worth pursuing. research captures competitive and market data gathering that feeds validation decisions.
Where it fits
Size a vertical SaaS niche with bottom-up unit counts before picking a wedge feature.
Translate competitor landscape notes into TAM/SAM filters for your positioning story.
Use SOM estimates to cap MVP scope and first-year revenue assumptions in a one-page spec.
How it compares
Structured sizing methodology in chat—not a live data API or automated financial model spreadsheet.
Common Questions / FAQ
Who is startup-business-analyst-market-opportunity for?
Founders and product-minded solo builders who want guided TAM/SAM/SOM analysis without hiring an analyst for the first pass.
When should I use startup-business-analyst-market-opportunity?
During Idea research when evaluating a new category; during Validate scope when turning opportunity into MVP boundaries; before pitch decks or roadmap prioritization conversations.
Is startup-business-analyst-market-opportunity safe to install?
It is documentation-driven with community sourcing—verify claims and data yourself and check the Security Audits panel on this Prism page.
SKILL.md
READMESKILL.md - Startup Business Analyst Market Opportunity
# Market Opportunity Analysis Generate a comprehensive market opportunity analysis for a startup, including Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) calculations using both bottom-up and top-down methodologies. ## Use this skill when - Working on market opportunity analysis tasks or workflows - Needing guidance, best practices, or checklists for market opportunity analysis ## Do not use this skill when - The task is unrelated to market opportunity analysis - You need a different domain or tool outside this scope ## Instructions - Clarify goals, constraints, and required inputs. - Apply relevant best practices and validate outcomes. - Provide actionable steps and verification. - If detailed examples are required, open `resources/implementation-playbook.md`. ## What This Command Does This command guides through an interactive market sizing process to: 1. Define the target market and customer segments 2. Gather relevant market data 3. Calculate TAM using bottom-up methodology 4. Validate with top-down analysis 5. Narrow to SAM with appropriate filters 6. Estimate realistic SOM (3-5 year opportunity) 7. Present findings in a formatted report ## Instructions for Claude When this command is invoked, follow these steps: ### Step 1: Gather Context Ask the user for essential information: - **Product/Service Description:** What problem is being solved? - **Target Customers:** Who is the ideal customer? (industry, size, geography) - **Business Model:** How does pricing work? (subscription, transaction, etc.) - **Stage:** What stage is the company? (pre-launch, seed, Series A) - **Geography:** Initial target market (US, North America, Global) ### Step 2: Activate market-sizing-analysis Skill The market-sizing-analysis skill provides comprehensive methodologies. Reference it for: - Bottom-up calculation frameworks - Top-down validation approaches - Industry-specific templates - Data source recommendations ### Step 3: Conduct Bottom-Up Analysis **For B2B/SaaS:** 1. Define customer segments (company size, industry, use case) 2. Estimate number of companies in each segment 3. Determine average contract value (ACV) per segment 4. Calculate TAM: Σ (Segment Size × ACV) **For Consumer/Marketplace:** 1. Define target user demographics 2. Estimate total addressable users 3. Determine average revenue per user (ARPU) 4. Calculate TAM: Total Users × ARPU × Frequency **For Transactions/E-commerce:** 1. Estimate total transaction volume (GMV) 2. Determine take rate or margin 3. Calculate TAM: Total GMV × Take Rate ### Step 4: Gather Market Data Use available tools to research: - **WebSearch:** Find industry reports, market size estimates, public company data - **Cite all sources** with URLs and publication dates - **Document assumptions** clearly Recommended data sources (from skill): - Government data (Census, BLS) - Industry reports (Gartner, Forrester, Statista) - Public company filings (10-K reports) - Trade associations - Academic research ### Step 5: Top-Down Validation Validate bottom-up calculation: 1. Find total market category size from research 2. Apply geographic filters 3. Apply segment/product filters 4. Compare to bottom-up TAM (should be within 30%) If variance > 30%, investigate and explain differences. ### Step 6: Calculate SAM Apply realistic filters to narrow TAM: - **Geographic:** Regions actually serviceable - **Product Capability:** Features needed to serve - **Market Readiness:** Customers ready to adopt - **Addressable Switching:** Can reach and convert Formula: ``` SAM = TAM × Geographic % × Product Fit % × Market Readiness % ``` ### Step 7: Estimate SOM Calculate realistic obtainable market share: **Conservative App