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Y Combinator
3. Business Models

Startup Business Models and Pricing

Startup Business Models and Pricing | Startup School (opens in a new tab)

The 9 business models of nearly every $B company

A business model is a fancy term for “how you make money”

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SaaS

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PRIMARY METRICS:

  • Monthly Recurring Revenue (MRR) or Annual Recurring Revenue (ARR)
  • Growth Rate: Measured weekly or monthly
  • Net Revenue Retention: % of recurring revenue retained from a prior period
  • CAC: Costs to acquire a new customer

TAKEAWAYS:

  • All the benefits of recurring revenue
  • Can have non-recurring revenue, but don’t include in ARR/MRR
  • Usually sold to businesses, ideally on annual contracts
  • Growth can be driven by direct sales, self-serve acquisition channels, or both

Market Place

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  • Facilitate transactions with buyers & sellers

PRIMARY METRICS:

  • Gross Merchandise Value (GMV): Total sales volume transacted
  • Net Revenue: Fees charged for transactions (often a % take rate)
  • Growth Rate
  • User Retention: % of month 1 customers that purchase in month 2, etc

TAKEAWAYS:

  • Hard to get off the ground, chicken & egg problem
  • Need to scale supply and demand in sync
  • Network effects at scale drive exponential growth
  • When they work, often become dominant winner-take-all winners

Usage Base

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  • Pay-as-you-go based on consumption

PRIMARY METRICS:

  • Monthly Revenue (not recurring!)
  • Growth Rate
  • Revenue Retention: % of revenue from last month’s customers in this month
  • Gross Margin: Revenue - Cost of Goods Sold (COGS)

TAKEAWAYS:

  • Don’t confuse usage-based revenue with recurring revenue
  • Charge per API request, # of records, data usage, etc
  • Grow as your customers grow
  • Product and pricing scale to support tiny startups to large enterprises

Advertising

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  • Sell ads to monetize free users

PRIMARY METRICS:

  • Daily Active Users (DAU): Unique users active in 24 hours
  • Monthly Active Users (MAU): Unique users active in 28 days
  • User Retention: % of active users on D1/7/30/etc
  • CPM (Cost Per Thousand) or CPC (Cost Per Click)

TAKEAWAYS:

  • Typically consumer social products with huge scale
  • The customer is the advertiser, not the end user
  • Users are the product being sold
  • Need billions of impressions each month
  • Registered Users is a vanity metric

Subscription

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  • Product or service sold on a recurring basis, usually to consumers

PRIMARY METRICS:

  • Monthly Recurring Revenue (MRR) or Annual Recurring Revenue (ARR)
  • Growth Rate: Measured weekly or monthly
  • User Retention: % of month 1 customers that purchase in month 2, etc
  • CAC

TAKEAWAYS:

  • Recurring revenue is the most valuable revenue
  • Usually sold to consumers, often paying monthly
  • Usually lower price points, from a higher volume of customers
  • Growth driven by scalable, self-serve acquisition channels

Transactional

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Facilitate Transactions & take a cut

PRIMARY METRICS:

  • Gross Transaction Value (GTV): Total payment volume transacted
  • Net Revenue: Fees charged for transactions (often a %)
  • User Retention: % of month 1 customers that purchase in month 2, etc
  • CAC

TAKEAWAYS:

  • Usually fintech and payment businesses
  • One-time transactions rather than recurring
  • Often high volume with a low fee (1-3% is common)
  • Best transactional businesses have extremely consistent revenue from high repeat usage

Hard tech/Bio/Moonshots

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  • Hard businesses with lots of technical risk and long time horizons

PRIMARY METRICS:

  • Milestones: Progress towards the long-term vision
  • Signed contracts
  • Letters of Intent (LOIs): Non-binding contracts indicating interest to purchase

TAKEAWAYS:

  • Often take years to get to a live product because of technical and/or regulatory risk
  • Impressive technical milestones or experimental data can de-risk the tech
  • Revenue is often years away, so signed LOIs are usually the best way to show customer interest

Enterprise

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  • Sell large contracts to huge companies

PRIMARY METRICS:

  • Bookings: Total signed contract value (recurring + non-recurring)
  • Revenue: Recognized when delivering on the contract
  • Annual Contract Value (ACV): Total contract value / # of years
  • Pipeline: Top of funnel → Demo → Close

TAKEAWAYS:

  • Very few customers, much larger deals ($100k+/year)
  • Growth driven by direct sales
  • Often begin with paid pilots or LOIs
  • Usually long sales cycles, with many gatekeepers
  • The buyer is not always the end user
  • Lumpy growth: measuring m/m growth rate doesn't make as much sense

E-Commerce

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  • Sell products online

PRIMARY METRICS:

  • Monthly Revenue: Total sales
  • Growth Rate: Measured weekly or monthly
  • Gross Margin/Unit Economics: Revenue - Cost of Goods Sold (COGS)
  • CAC

TAKEAWAYS:

  • Includes D2C brands and Shopify stores
  • Not marketplaces, so keep 100% of each sale
  • Higher COGS = lower margins
  • Products often commoditized
  • Need to be excellent at user acquisition and operations/unit economics

Overall Lessons

What’s not in the top 100

  • Services/Consulting Businesses:
    • Non-recurring revenue, scale with people, low margins
  • Affiliate Businesses:
    • Too far away from the transaction
  • Hardware Businesses:
    • Require lots of capital, has low margins
  • Businesses build on other platforms
    • Too much platform risk
  • Highly predictable
  • Higher LTVs (Customer Lifetime Value)
  • Lower CACs (Customer Acquisition Cost)

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Last updated on Mon Oct 20 2025