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How to build a marketplace app with AI: sellers, buyers and payouts

Build a multi-vendor marketplace app with AI: seller onboarding and verification, listings, orders, commissions, seller payouts, disputes and rules to check.

Fanann Team8 min read
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Quick answer

A marketplace app connects many sellers with buyers. It needs seller sign-up and verification, a dashboard for each seller to manage listings and orders, search and categories for buyers, payment through a gateway that supports split payments, automatic commission, scheduled seller payouts, and a disputes and refunds process. You can build it with AI; the key is starting with one category and bringing sellers in first.

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How do you build a multi-vendor marketplace app?

To build a marketplace app, describe the three sides (buyer, seller, operator), seller sign-up and verification rules, your commission, payment and payout flow, and your refund and dispute policy to an AI builder. The agent builds the buyer app, seller dashboard, operator panel and database; you review the money logic and permissions carefully before launch.

The difference from a store is fundamental. In a store you are the only seller and every order's money is yours. In a marketplace, each order has another seller, and money passes through you before part of it goes to them. That raises questions a store never asks: who ships, who answers complaints, when sellers get paid, and who covers refunds.

Marketplace ideas that fit the Gulf

  • Home-based food producers: home cooking, sweets and baked goods delivered locally.
  • Abayas and fashion from independent designers.
  • Perfume and oud from several shops.
  • Services: tutors or technicians; see the tutoring marketplace guide.
  • Classifieds; for cost, read how much an app like Haraj costs.

The three sides and their features

SideCore featuresLater
BuyerBrowse, search and filters, product and seller pages, multi-seller cart, payment, order tracking, reviews, refund requestsWishlist, follow sellers, coupons
SellerSign-up and verification, listings and stock, order handling and status, balance and statement, review repliesPromotions, advanced analytics, staff accounts
Operator (you)Seller approval, listing review, commissions, payouts, disputes, reportsPaid seller ads, subscription tiers

Permissions are critical: sellers see only their own orders and listings, never buyers who did not buy from them, and cannot change their commission. Ask for these rules on the server and database. For plain-language table design, read database design for non-developers.

Money: payments, commission and seller payouts

This is the heart of a marketplace, and mistakes are costly. The golden rule: do not collect sellers' money in your own bank account and pay them manually. Use a licensed gateway with marketplace features: split payments, seller sub-accounts and scheduled payouts. Collecting and redistributing other people's money can be a regulated activity that needs a licence.

  1. 1
    Buyer pays

    By mada, Apple Pay, card, or Tabby and Tamara, through Fanann payments.

  2. 2
    System records the split

    Each seller's share, your commission, and any delivery fee.

  3. 3
    Holding period

    The seller's share stays pending until delivery is confirmed and the refund window ends.

  4. 4
    Payout

    Weekly or on your schedule via the gateway, with a detailed statement in the seller dashboard.

  5. 5
    Reconciliation

    Refunds and deductions come off the seller's next balance, transparently.

Have the system receive payment and payout confirmations from the gateway via webhooks, not by relying on the buyer returning to a success page that may never load. For payment basics, read how to add payments to your app.

Commission per order
  • A percentage or flat fee per sale
  • Sellers pay only when they sell
  • Easier to attract sellers early
  • Your revenue tracks sales volume
Monthly seller subscription
  • A fixed fee to be listed
  • Predictable revenue for you
  • Harder before you have buyers
  • Can be combined with a lower commission later

Seller verification and the rules to check

Buyers trust a marketplace as much as they trust its sellers. Before activation, require: name and a verified phone number, a bank account (IBAN) for payouts, and a business document: a commercial registration or freelance document in Saudi Arabia, or a trade licence or e-Trader licence in Dubai, depending on the seller.

  • In Saudi Arabia, the E-Commerce Law requires clear disclosure of seller identity, contact details, prices and contract terms; read what your site must show.
  • Saudi e-store verification has moved to the Saudi Business Center's Business Platform (formerly Maroof).
  • In the UAE, Federal Decree-Law 14/2023 on trading by modern technological means covers websites, apps and social commerce.
  • VAT is 15% in Saudi Arabia and 5% in the UAE; how commissions and sales are treated needs a specialist's review.

Disputes, reviews and trust

Your first dispute is a real test. Write the policy before launch and have the system enforce it step by step:

  1. The buyer opens a refund request within a set window, with reason and photos.
  2. The seller responds within a set time: accept, offer a fix, or decline with a reason.
  3. If they disagree or the seller is silent, the operator decides.
  4. The refund runs through the gateway and comes off the seller's pending balance.
  5. Every step is logged with a timestamp and actor.

Only verified buyers can review, and watch sellers with low ratings or repeat disputes. For bank disputes, read refunds and chargebacks in the Gulf.

Metrics to track from day one

  • Active sellers (sold in the last 30 days), not just registered ones.
  • Share of orders completed without a dispute.
  • Average preparation time per seller.
  • Share of buyers who purchase again.

A ready prompt to build it in Fanann

Home producers marketplace prompt

Build a marketplace called 'Min Al Bait', Arabic first with English, connecting home-based producers in Riyadh with buyers. Three roles: buyer, seller, operator. Sellers sign up by phone with OTP, upload a freelance document or commercial registration and an IBAN, and appear only after operator approval. Sellers add products with photos, prices, stock and preparation time, handle orders and update status, and see pending and available balances and a statement. Seller pages show name, document and rating as the E-Commerce Law requires. Buyers browse by category and neighborhood, add items from several sellers to one cart, and pay once by mada, Apple Pay, Tabby or Tamara; the system splits the order into per-seller sub-orders. Operator commission is a percentage editable per category. Seller funds stay pending until delivery is confirmed plus 3 days, then pay out weekly through the gateway. Payment confirmations via webhook. Refunds: buyer opens a request within 48 hours with photos, the seller replies within 24 hours, otherwise the operator decides. Reviews from verified buyers only. Operator panel: seller approval, listing review, disputes, payouts, reports on active sellers and completed orders. Enforce permissions on the server. Show the plan before building.

Try it in Fanann

How to launch: sellers first

Every new marketplace faces the same problem: buyers will not come without sellers, and sellers will not come without buyers. The practical fix is to start with sellers in one category and one city, help them list and photograph products yourself, then bring buyers through the sellers' own Snapchat, Instagram and WhatsApp audiences.

  • Test the full money flow with a real card and a small amount: pay, split, refund, payout.
  • Log in as a seller and confirm you cannot see another seller's orders.
  • Try a three-seller cart and a partial refund from one of them.
  • Prepare terms, privacy and refund policy pages.
  • Twenty active sellers beat two hundred inactive ones.

Key takeaways

  • A marketplace has three sides: buyer, seller and you as operator, each with different screens and permissions.
  • Do not hold sellers' money yourself; use a gateway that supports split payments and seller payouts.
  • Verify sellers before activation and show their identity to buyers, as e-commerce rules require.
  • Write the refund and dispute policy before launch; the first dispute sets trust on both sides.
  • Start with one category in one city, and bring sellers in before buyers.

Frequently asked questions

How do I pay out sellers in a marketplace?
Through a licensed gateway that supports split payments and seller payouts. The system records each seller's share and your commission, holds it until delivery and the refund window, then pays out on schedule with a statement.
Can I build a multi-vendor marketplace without coding?
Yes. Describe the sides, verification, commission, payouts and disputes, and the agent builds the buyer app, seller dashboard and operator panel. Review the money logic and permissions carefully and test with small amounts.
What is the difference between an online store and a marketplace?
A store has one seller: you. A marketplace has many sellers, money passes through you and is split, and you need seller verification, payouts and a dispute process.
Do I need a licence to run a marketplace?
You need a licence for your business, must follow e-commerce and consumer protection rules, and handling other people's money may need special arrangements. Check with the Ministry of Commerce and SAMA in Saudi Arabia, or DET and the Central Bank in the UAE.
How do marketplaces charge sellers?
A percentage or flat fee per order deducted automatically at the split, a monthly seller subscription, or a mix. Per-order commission is easier for attracting sellers early.

Ask your AI assistant about this

Copy this prompt into the AI assistant you use, then add the details of your own case.

I am reading this guide: “How to build a marketplace app with AI: sellers, buyers and payouts” https://fanann.com/en/blog/build-marketplace-app/ My question: how to build a marketplace app Use that page as a source and explain the answer step by step for my situation, tell me what to check before I start, and cite the page link.

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