Business model
Agent Skills for AI-native startup founders — a founder-playbook hub + 12 per-function skills. Adapted from Linas Beliūnas's One-Person Unicorn + Anthropic's Founder's Playbook.
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Help founders design pricing strategy, analyze unit economics, and create competitive positioning. Use when a founder asks "How should I price this?", "What's my unit economics?", "How do I position against competitors?", "Is this a good business model?", "Help me figure out my margins", "What's my LTV/CAC?", "Should I do subscription or usage-based?", or needs to articulate their business model for investors.
SKILL.md
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Business Model Design
Guide founders from business model selection through pricing, unit economics, and competitive positioning to investor-ready articulation.
Workflow
1. Diagnose Current State
Ask: "Where are you in business model development?"
| State | Signals | Next Step |
|---|---|---|
| No model yet | Has product idea, no monetization plan | → Step 2: Select Business Model Type |
| Model chosen | Knows type (SaaS, marketplace, etc.), needs pricing | → Step 3: Design Pricing |
| Has pricing | Needs to validate unit economics | → Step 4: Unit Economics Analysis |
| Entering market | Needs differentiation strategy | → Step 5: Competitive Positioning |
| Pitch prep | Needs to articulate model clearly | → Step 6: Create Deliverables |
2. Select Business Model Type
Match founder's product to the right model archetype. See references/business-model-patterns.md for the complete pattern library.
Core Model Types (YC Framework):
| Model | Description | Key Metrics | Best For |
|---|---|---|---|
| SaaS | Cloud subscription software | MRR/ARR, NRR, CAC | B2B software with recurring value |
| Transactional | Take cut of transactions | GTV, Net Revenue, Retention | Fintech, payments |
| Marketplace | Connect buyers + sellers | GMV, Take Rate, Liquidity | Platforms with network effects |
| Subscription | Recurring consumer service | MRR, Churn, LTV | Consumer products with habit |
| Enterprise | Large contracts to big companies | Bookings, ACV, Pipeline | Complex B2B, long sales cycles |
| Usage-Based | Pay per consumption | Monthly Revenue, Retention | APIs, infrastructure, cloud |
| E-commerce | Sell products online | Revenue, Gross Margin, CAC | D2C brands, physical goods |
| Advertising | Monetize free users via ads | DAU/MAU, Retention, CPM | High-scale consumer apps |
Selection Questions:
- Who pays? (End user, business, advertiser, both sides?)
- How often do they pay? (One-time, recurring, per-use?)
- What's the natural buying pattern? (Impulse, considered, enterprise?)
- Where's the value? (Product, platform, network?)
3. Design Pricing Strategy
Three foundational approaches — choose based on market position:
| Strategy | When to Use | Method |
|---|---|---|
| Value-Based | Differentiated product, clear ROI | Price based on customer value delivered |
| Cost-Plus | Commodity market, known costs | Cost + target margin (rarely optimal for SaaS) |
| Competitive | Established market, price-sensitive | Position relative to alternatives |
See references/pricing-frameworks.md for detailed implementation.
Pricing Model Selection (for SaaS/subscription):
| Model | Pros | Cons | Use When |
|---|---|---|---|
| Per-seat | Simple, predictable | Limits adoption | Value scales with users |
| Per-feature (tiered) | Natural upsell path | Complexity | Clear feature-value tiers exist |
| Usage-based | Scales with customer | Revenue volatility | Value directly tied to consumption |
| Flat-rate | Dead simple | Leaves money on table | Early stage, testing |
| Freemium | Low friction acquisition | Conversion challenge | Wide top-of-funnel, viral potential |
| Hybrid | Flexibility | Complexity | Enterprise + self-serve motions |
Value Metric Selection (HOPE Framework): Find the metric that best captures value delivery:
- High value connection — Does it correlate to customer outcomes?
- Obvious to customer — Is it familiar and predictable?
- Predictable — Can customers forecast their usage?
- Easy to implement — Can you actually measure and bill it?
Common value metrics: seats, contacts, API calls, records, storage, revenue processed, messages sent.
Pricing Sanity Checks:
- Does price reflect value delivered?
- Can customers predict their bill?
- Is there a natural expansion path?
- Does pricing align with how customers budget?
4. Unit Economics Analysis
The health check for any business model. See references/unit-economics.md for formulas and benchmarks.
Core Metrics:
| Metric | Formula | Healthy Benchmark |
|---|---|---|
| CAC | Total S&M Spend ÷ New Customers | Varies by model |
| LTV | (ARPU × Gross Margin) ÷ Churn Rate | 3× CAC minimum |
| LTV:CAC Ratio | LTV ÷ CAC | 3:1 to 5:1 optimal |
| CAC Payback | CAC ÷ Monthly Gross Profit | <12 months for SaaS |
| Gross Margin | (Revenue - COGS) ÷ Revenue | >70% for SaaS |
Diagnostic Questions:
- What does it cost to acquire a customer? (CAC)
- How much will that customer pay over their lifetime? (LTV)
- How long until you recoup acquisition cost? (Payback)
- Are you making money on each transaction? (Gross Margin)
Red Flags:
- LTV:CAC < 1:1 — Unsustainable, losing money on every customer
- LTV:CAC 1:1 to 2:1 — Dangerous, need optimization
- CAC Payback > 18 months — Cash flow risk, slow growth
- Gross Margin < 50% — Not a software business, harder to scale
By Business Model Type:
| Model | Key Economics | Target |
|---|---|---|
| B2B SaaS | LTV:CAC 3:1+, Payback <12mo | NRR >100% |
| B2C SaaS | LTV:CAC 3:1+, Payback <6mo | Viral coefficient >1 |
| Marketplace | Unit margin positive, GMV growth | Take rate 10-20% |
| E-commerce | Contribution margin >30%, CAC < first order | Repeat rate >40% |
5. Competitive Positioning
How to stand out in a crowded market. See references/positioning-frameworks.md for detailed frameworks.
April Dunford's Positioning Flow:
Competitive Alternatives → Unique Capabilities → Value → Target Customer → Market Category
Step-by-step:
-
List Competitive Alternatives
- What would customers do if you didn't exist?
- Include: direct competitors, indirect solutions, doing nothing, manual processes
-
Identify Unique Capabilities
- What do you have that alternatives don't?
- Features, technology, service, price, experience
-
Map to Value
- So what? What does each capability enable?
- Connect features → benefits → outcomes
-
Define Best-Fit Customers
- Who cares most about your unique value?
- What characteristics make someone care?
-
Choose Market Category
- What context makes your value obvious?
- Options: existing category, subcategory, new category
Positioning Statement Template:
For [target customer] who [need/job], [product] is a [category] that [key benefit]. Unlike [competitors], we [key differentiator].
Porter's Strategic Options:
- Cost Leadership — Win on price (lowest cost structure)
- Differentiation — Win on value (unique capabilities worth premium)
- Focus — Win in a niche (cost or differentiation, narrow market)
Positioning Strategies:
| Strategy | When to Use | Risk |
|---|---|---|
| Head-to-Head | You can genuinely beat the leader | Resource-intensive |
| Big Fish, Small Pond | Niche underserved by leaders | Market may be too small |
| Create New Category | Truly novel, no good comparison | Education cost is high |
6. Create Deliverables
Output 1: Business Model One-Pager
## [Company Name] Business Model
**Model Type:** [SaaS/Marketplace/etc.]
**Value Proposition:**
[One sentence: For whom, what problem, unique solution]
**Customer Segments:**
- Primary: [Description, size, characteristics]
- Secondary: [If applicable]
**Revenue Model:**
- Type: [Subscription/Usage/Transaction/etc.]
- Pricing: [Structure and price points]
- Value metric: [What you charge for]
**Key Metrics:**
| Metric | Current | Target |
|--------|---------|--------|
| MRR/ARR | $ | $ |
| Customers | # | # |
| LTV | $ | $ |
| CAC | $ | $ |
| LTV:CAC | X:1 | X:1 |
**Unit Economics:**
- Gross Margin: X%
- CAC Payback: X months
- Expansion potential: [How customers grow with you]
**Go-to-Market:**
- Primary channel: [How you acquire]
- Sales motion: [Self-serve/Sales-assisted/Enterprise]
Output 2: Pricing Recommendation
Document should include:
- Recommended pricing model with rationale
- Specific price points with justification
- Tier structure (if applicable)
- Comparison to alternatives
- Expected conversion/upgrade rates
Output 3: Unit Economics Spreadsheet
Create spreadsheet with:
- CAC calculation (itemized S&M spend)
- LTV calculation (ARPU, churn, margin)
- LTV:CAC ratio
- CAC payback period
- Sensitivity analysis (what if churn changes?)
- 12-month projection
See references/unit-economics.md for template structure.
Output 4: Positioning Statement
Format:
For [target customer with specific characteristics] who [struggle with specific problem], [Product Name] is a [market category] that [delivers specific benefit/outcome]. Unlike [primary alternative], our product [key differentiator that matters to target customer].
Plus supporting elements:
- Competitive alternatives map
- Unique capabilities list
- Value proof points
- Best-fit customer profile
Reference Files
references/business-model-patterns.md— 55+ business model patterns with examplesreferences/pricing-frameworks.md— Value-based, competitive, and hybrid pricing in detailreferences/unit-economics.md— LTV, CAC, formulas, benchmarks, and spreadsheet templatereferences/positioning-frameworks.md— April Dunford method, Porter's strategies, positioning templates
Adapted from Linas Beliūnas's The One-Person Unicorn founder skill set.