How to Build a Marketplace: Liquidity, Payments and Trust
Marketplace software is a solved problem. Marketplace liquidity is not. If you are planning a two-sided platform, most of your risk is in the sequence you launch it, not in the code.
Published · 16.04.18
Solve the cold start before you solve the product
An empty marketplace is worthless to both sides, so your first job is making a tiny marketplace feel full. Narrow the category and the geography until you can seed supply by hand, then expand only when each new area is dense enough to serve demand within minutes.
Concretely: pick one city, one category and twenty suppliers you personally recruited. Every successful marketplace you know did something equally unscalable at the start.
The money path is the hard part of the build
Split payments, payouts, refunds, chargebacks and tax reporting are where marketplace projects overrun. Use a platform like Stripe Connect rather than moving money yourself — becoming a payment institution is not the business you meant to start.
- Decide commission, subscription or lead fees before building — each one changes the product.
- Design for disputes from day one: holds, partial refunds, evidence and a support queue.
- Handle EU VAT and invoicing per side of the marketplace.
- Keep transactions on-platform by making on-platform genuinely better, not just by forbidding contact.
Trust is a feature, not a policy page
Buyers take a risk with a stranger every time. Verification, reviews, clear cancellation rules, escrowed payment and responsive support are what convert first-time visitors — and they matter more than search filters.
Build the moderation tools for your own operations team in v1. Running trust and safety through a database client does not survive your first bad actor.
Frequently asked questions
How long does it take to build a marketplace MVP?
A focused single-category marketplace with listings, matching, payments and reviews is typically a matter of weeks; multi-category, multi-country platforms take considerably longer.
What commission should a marketplace charge?
Most take 10–20% of transaction value, depending on how much of the risk, discovery and payment work the platform absorbs. Start higher than feels comfortable — cutting later is easy, raising is not.