What makes a marketplace hard
A marketplace isn't one product — it's two, plus the market between them. You're building for buyers and for sellers simultaneously, and neither shows up without the other.
On top of that sits the money: taking payment from one side, holding it, and paying out the other, with fees, refunds, and disputes in between. That payment layer carries real regulatory and financial weight.
- Two sides to satisfy at once — supply and demand, each with different needs
- The cold-start problem: no buyers without sellers, no sellers without buyers
- Matching and discovery: search, ranking, and filtering that connect the right parties
- Trust and safety: reviews, verification, dispute handling, fraud prevention
- Split payments and payouts, with fees, escrow-style holds, refunds, and taxes
- Compliance around handling and moving other people's money
Payments, payouts, and trust
The money flow is where marketplace engineering gets serious. You generally don't want to be the one legally holding funds — platforms like Stripe Connect let you split payments and pay out sellers while handling the compliance-heavy parts.
Trust features aren't optional either: without reviews, verification, and a way to resolve disputes, neither side feels safe transacting.
- Use a payments platform built for marketplaces (such as Stripe Connect) to handle payouts and KYC
- Split payments cleanly and auditably: your platform fee, the rest to the seller
- Hold-and-release logic so buyers pay before delivery and sellers get paid after
- Reviews and ratings that build trust and inform matching
- Identity verification for sellers and fraud detection on both sides
- A dispute and refund process that's fair and clearly defined
Solving cold-start and how we build it
The hardest early problem is liquidity — having enough on both sides that transactions actually happen. There's no single trick, but there are proven tactics, and the product should be built to concentrate activity rather than spread it thin. We build the platform and help you design for that first burst of liquidity.
- Concentrate on a narrow niche or geography first to reach liquidity faster
- Consider seeding one side (often supply) before opening the other
- Build search and matching that make the available inventory feel abundant
- Instrument the funnel on both sides so you see where each drops off
- Build payments, payouts, trust, and matching as one coherent, auditable system
More on saas products
Frequently asked questions
Do we have to handle the money ourselves?
You generally shouldn't, and usually don't have to. Marketplace payment platforms let you split payments and pay out sellers while they handle the licensing, KYC, and much of the compliance that comes with moving other people's funds. Building that yourself is a legal and engineering burden most marketplaces don't need to take on.
How do we solve the chicken-and-egg problem?
There's no universal answer, but the reliable patterns are: start narrow — one city, one niche — so a small amount of activity feels like a real market, and often seed one side first, commonly supply, so early demand finds something. The product should concentrate liquidity, not scatter it. We can work through the strategy for your specific market together.
How much does a marketplace cost to build?
The main drivers are the payments and payout complexity, how sophisticated matching and search need to be, and the trust-and-safety features required. A marketplace is more involved than a standard app because it's effectively two products plus a payment system. We scope it against your model in a free consultation.