How much does it cost to build an app like Amazon?

E-commerce is many systems, not one app

• Storefront — catalog, search, product pages, cart, checkout
• Payments — cards, wallets, refunds, order status
• Seller tools (for a marketplace) — listings, inventory, payouts
• Admin — orders, customers, promotions, reports
• Optional: reviews, recommendations, shipping/logistics integration

The real cost drivers

A single-brand store (your products, your checkout) typically lands around $8,000 – $25,000. A multi-seller marketplace — where third parties list, sell and get paid — is a much bigger build starting well above that, because seller onboarding, payouts and moderation are whole systems of their own.

Start focused, then broaden

You rarely need Amazon's full feature set to launch. Start with a clean store or a single-category marketplace, prove that people buy, then add sellers, recommendations and logistics from real demand. It's cheaper to grow into features than to build them all up front.