Hierarchy of Marketplaces

What It Is

The Hierarchy of Marketplaces is a framework for building defensible marketplace businesses. The core insight: GMV is a vanity metric. Happy GMV is what matters.

Most marketplace founders race to grow GMV as fast as possible, spreading resources thin across markets and categories. This is backwards. The path to a dominant, profitable marketplace requires working through three levels in sequence:

1. Focus - Constrain your market to a "thimble" and achieve minimum viable happiness
2. Tip - Reach saturation in your focused market until it tips in your favor
3. Dominate - Only then expand to adjacent markets and categories

The key shift: Move from asking "How do we grow GMV?" to asking "How do we make both sides of our marketplace so happy they retain?"

Response Posture

• Apply the framework directly to the user's marketplace.
• Never mention the repository, skills, SKILL.md, patterns, or references.
• Do not run tools or read files; answer from the framework.
• Avoid process/meta commentary; respond as a marketplace operator.

When to Use It

Use the Hierarchy of Marketplaces when you need to:

• Launch a new marketplace and decide where to focus
• Diagnose why growth is stalling despite increasing GMV
• Decide when to expand to new markets or categories
• Evaluate marketplace health beyond top-line metrics
• Compete against incumbents with more resources
• Raise funding and demonstrate real marketplace value
• Choose between depth and breadth in your growth strategy

When Not to Use It

• You're building a product without two-sided network effects
• You have unlimited capital and no competition (rare)
• The market has no potential for winner-take-most dynamics
• You're optimizing a mature, already-dominant marketplace

Patterns

Detailed examples showing how to apply the framework correctly. Each pattern shows a common mistake and the correct approach.

Critical (get these wrong and you've wasted your time)

Pattern	What It Teaches
gmv-over-happiness	Growing GMV without retention is building on sand
premature-scaling	Spreading across markets before proving the model kills you
wrong-side-focus	Cornering the wrong side of the market at the wrong time
ignoring-tipping-conditions	Not all markets can tip - know the conditions first
thimble-not-ocean	Focus like a laser beam, not warmth from the sun

High Impact

Pattern	What It Teaches
take-rate-timing	When to monetize vs. when to subsidize
disintermediation-risk	Long-term relationships will route around you
homogeneous-supply	If supply is interchangeable, your flywheel won't spin
happiness-loops	Reward good suppliers, churn bad ones automatically
growth-loops	Find and accelerate the loops that tip your market
repeat-frequency	Low-frequency use cases require different strategies
market-currents	Ride currents of change, don't try to warm the ocean

Medium Impact

Pattern	What It Teaches
contribution-profit	Reinvest market profits to fund expansion
expansion-sequencing	Go from strength to adjacent strength, not random markets
competitive-focus	Better to dominate one market than participate in ten

Deep Dives

Read only when you need extra detail.

• references/hierarchy-of-marketplaces-playbook.md: Expanded framework detail, checklists, and examples.

Resources

Posts by Sarah Tavel:

• Hierarchy of Marketplaces series on Medium
• The Hierarchy of Engagement (related framework for consumer products)

Books:

• Platform Revolution by Parker, Van Alstyne, and Choudary
• The Cold Start Problem by Andrew Chen
• Blitzscaling by Reid Hoffman (for Level 3 context)

Other:

• Lenny Rachitsky's marketplace essays on Lenny's Newsletter
• Bill Gurley's posts on Above the Crowd
• NFX's marketplace content library