The Chicken and The Egg — by Dan Lynn
By Dan Lynn
Every two-sided business starts with a paradox. Uber is the classic example: drivers wouldn't sign up because there were no riders, and riders wouldn't use it because there were no drivers. Each side needed the other to exist first. Chicken, meet egg.
It looks impossible — but it's a solved problem, at least on paper. The solution is counterintuitive: don't try to build both sides at once. Pick one side and build it first. For marketplaces, that's almost always the supply side — the harder side to win. Uber poured its energy and money into drivers, even guaranteeing their pay, because they knew riders would follow the moment cars were on the road.
The second key is to start small and dense. Andrew Chen, who helped scale Uber, calls it building an "atomic network" — the smallest network that can stand on its own. Uber didn't launch nationally; it went city by city. Facebook started at a single college. Win one tight network completely before you scale.
It also helps to make one side valuable on its own — "come for the tool, stay for the network." OpenTable handed restaurants useful booking software before there was any diner network at all. Give one side a reason to show up even before the other exists.
Now, here's what I can add from living it — because I spent a year studying two-sided networks, and then I started building one. The books make the recipe sound cleaner than it cooks. What no case study prepared me for is this: even a yes is not activation. People genuinely want to join your supply side. They say yes — and they mean it. And then real life happens, and every single activation still takes a walkthrough, a follow-up, one more conversation. The Airbnb founders famously went door to door, personally photographing their hosts' apartments. I used to read that as a colorful detail. Now I understand it was the whole job. At the start, you don't scale supply — you hand-carry it, one person at a time.
A two-sided network feels like magic from the outside. It isn't. You ignore the paradox, pick the hard side, and make it thrive in one small corner — then you do it again, and again, until it tips. Just know the truth going in: the strategy is simple. The work is anything but.
Questions this Key Learning answers
How do I solve the chicken-and-egg problem in a marketplace?
The author recommends resisting the urge to build both sides simultaneously. Start with the harder side, usually supply, and give participants a reason to join before demand exists. Build a small, dense network that can work on its own, then repeat the process in another market only after the first is thriving.
Why do people sign up but never become active?
A sincere yes is not the same as activation. As the author learned, real life, uncertainty, and setup friction can stop willing participants from taking the next step. Our analysis frames walkthroughs, reminders, follow-ups, and personal setup as part of building the product—not administrative cleanup. The meaningful measures are first use and repeat participation.
When is a two-sided marketplace ready to expand?
The author’s lesson is to win one tight network completely before scaling. Our analysis makes that threshold more specific: expand after a small market has dependable supply and consistently produces successful matches. By then, the manual work has created not only a functioning network, but also practical knowledge about how to build the next one.