Overview
A marketplace doesn't own the inventory it sells; it matches two sides — buyers and sellers, riders and drivers, guests and hosts — and earns a fee on the transactions it enables. Because it doesn't hold the goods, it can scale far faster than a business that must buy, store and ship everything itself.
Marketplaces are governed by network effects and liquidity: more sellers attract more buyers, which attract more sellers. The hard part is the beginning — the 'chicken-and-egg' problem of needing both sides before either wants to show up.
How it works
Build a platform that matches two distinct groups who each want access to the other.
Solve the cold-start problem — seed one side densely enough to attract the other.
Take a percentage of each transaction; as liquidity grows, both sides get more value and the loop reinforces.
Where you see it
Platforms & exchanges
Two-sided platforms that match supply and demand and take a fee.
App stores
Match developers and users; the platform takes a cut of sales.
When it works
- Both sides genuinely need each other and struggle to connect alone.
- Network effects make the platform more valuable as it grows.
- The take-rate is sustainable and the platform adds real matching value.
When it fails
- You can't solve the cold-start problem and one side never shows up.
- Users 'disintermediate' — they meet on the platform then transact off it to dodge the fee.
- Multi-homing — users belong to several rival marketplaces at once, so no one wins.
Frequently asked questions
What's the chicken-and-egg problem?
Buyers won't come without sellers and sellers won't come without buyers. New marketplaces must seed one side (often subsidising it) to attract the other.
How do marketplaces make money?
Usually a take-rate — a percentage of each transaction they enable — plus sometimes listing fees, subscriptions, or advertising.