# Marketplace Fundamentals

Help users understand the core mechanics of marketplace businesses, from solving the...

- Repository: https://github.com/RefoundAI/lenny-skills (1456 stars)
- Category: Engineering
- License: MIT
- Last updated: 2026-07-16
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add RefoundAI/lenny-skills --skill marketplace-fundamentals -g -a claude-code -y`
Codex: `npx skills add RefoundAI/lenny-skills --skill marketplace-fundamentals -g -a codex -y`
Cursor: `npx skills add RefoundAI/lenny-skills --skill marketplace-fundamentals -g -a cursor -y`
Gemini CLI: `npx skills add RefoundAI/lenny-skills --skill marketplace-fundamentals -g -a gemini-cli -y`

## Description

Help users understand the core mechanics of marketplace businesses, from solving the cold start problem to maintaining quality and preventing platform leakage at scale.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Marketplace Fundamentals

Build, bootstrap, and scale a self-sustaining ecosystem of buyers and sellers.

Help the user with marketplace fundamentals using insights from 7 guests and posts across Lenny's Podcast and Newsletter.

## How to Help

1. **Diagnose the stage** - Identify if the user is in the bootstrapping, liquidity-seeking, or scaling phase of their marketplace.
2. **Pinpoint the hard side** - Help the user determine which side of the market (supply or demand) is the primary constraint and needs focus.
3. **Evaluate the value proposition** - Assess if the platform offers a 10x improvement in convenience, price, or variety compared to traditional alternatives.
4. **Select a growth strategy** - Recommend specific tactics like single-player mode, geographic constraints, or category niches to build density.

## Core Principles

### Nail the Value Exchange First
Benjamin Lauzier: "If you don't have product market fit, and if you don't have a good enough growth strategy for at least one side of your marketplace, just forget about all this marketplace stuff. Focus on this core exchange of value, go deep with one side of the marketplace and see if you can rely on some crutch, some hack for the other side for time being."

Before focusing on complex economic ratios, ensure the core transaction provides enough value to both sides to sustain a growth strategy. Identify the most difficult side of the market to acquire and concentrate early resources there.

### Build Standalone Value
Ramesh Johari: "The moral is a marketplace business never starts as a marketplace business, because what we think of as a marketplace business is something which at scale is removing the friction of the two sides finding each other. But when you start, you don't have that scale."

The rest: https://github.com/RefoundAI/lenny-skills/blob/HEAD/skills/marketplace-fundamentals/SKILL.md