The key points
- Payment must be held and released on a condition, then refunded if it fails.
- Verify identity before people can transact, without losing genuine users.
- Give your own team a console to see and intervene in any transaction.
- Decide which side of the market is harder to attract.
Why is a marketplace harder than a normal web app?
Two strangers must trust each other enough to exchange money. Payment cannot go to the seller the moment someone clicks buy, because the buyer has received nothing yet. Money has to be held, released on a condition and refunded when the condition fails. Most marketplace builds come apart on this, not on the screens.
How do you keep the market trustworthy?
Identity is the second half. If anyone can list, the market fills with people who should not be there, and the first bad experience can cost you both sides. Verification must happen before someone transacts, yet be light enough that genuine users do not abandon it. Those pull against each other, and the balance is a judgement call rather than a setting. Ask how a supplier handles it when you choose a development company.
What does your own team need?
Somewhere to stand. Orders stall, payments fail halfway and people disagree about what was delivered. An operations console that can see a transaction, read its history and intervene is the difference between a support problem and a refund. Buyers of marketplace builds rarely ask for it and almost always need it, so put it in the budget for the build from the start rather than adding it late.
- Separate onboarding for each side
- Escrow and payout scheduling
- Ratings, reviews and reputation
- Commission rules and multiple payment gateways with fallback
How a marketplace build is sequenced
Discovery
Define both sides of the market, the moment a job counts as delivered and the rules for disputes. One to two weeks.
Design
Design onboarding, listings, ordering and the operations console around those rules. About two weeks.
Build
Develop payments with escrow (for example separate charges and transfers in Stripe Connect), verification, tracking, reviews and payouts. Six to twelve weeks.
Launch
Deploy, test the payment and dispute paths with real accounts, and release in stages. About one week.
Plan your marketplace
- Which side of your market is harder to attract?
- At what exact moment has a job been delivered, and who decides?
- What verification will suppliers complete without dropping out?
- Who handles a dispute, and what powers do they need?
- How will money move, and when is it released?
Sources
Rules and guidance this answer relies on. Policies change, so check the current version before acting on it.