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

The published 2026 figures are consistent once you separate stores from marketplaces. E-commerce store apps run $20,000 to $50,000 simple and $50,000 to $120,000 mid-complexity; Amazon-style multi-vendor marketplaces run $200,000 to $500,000 or more¹². Here are the tiers, framed for a buyer:

1. Off-the-shelf store ($25/month to $25k)

   A single-seller shop on Shopify, WooCommerce, or BigCommerce, from about $25 a month, or a custom storefront build at $8k to $25k when you need control the platforms can't give. For most stores this tier is the whole answer, and building beyond it is a choice, not a requirement.

2. Custom store or mid-market app ($50k to $120k)

   A bespoke single-seller e-commerce app with real-time tracking, multiple payment gateways, analytics, and a tailored experience. Four to six months. The band where a growing brand with specific needs and enough revenue to justify custom development builds instead of buys.

3. Multi-vendor marketplace ($200k to $500k+)

   The Amazon shape: buyer app, seller panel, admin console, commission logic, split payouts, and search across many sellers. Nine to eighteen months at full scope. The tier to grow into once a focused, single-category version has proven the model, not to start at.

The usual caveat, these are vendors pricing their own work, applies. But Amazon carries a bigger caveat than most: for a large share of people asking this question, the right build cost is close to zero, because the thing they need already exists as a product you rent. That's where this guide starts.

The math is stark. A custom storefront build runs $8,000 to $25,000, and the transaction-fee and conversion advantages that justify it typically only pay off above roughly $500,000 in annual revenue³⁴. Below that, an off-the-shelf platform gives you more, faster, for less. Custom becomes genuinely worth it for a defined set of needs:

We'll happily tell you when buying beats building, because being honest about it is how we earn the builds that genuinely need custom work. Our custom software vs off-the-shelf guide walks the full decision. If your answer is "I need a marketplace," or "the platforms genuinely can't do what I need," then custom is warranted, and the rest of this guide is for you.

Published per-feature pricing shows where the marketplace premium lives¹:

The vocabulary that goes with a marketplace build, in plain English:

Storefront

The buyer-facing shop: catalog, product pages, search, cart, and checkout. In 2026 this is largely a solved, off-the-shelf problem, Shopify and similar platforms sell it as a subscription, so building one from scratch is usually a choice, not a necessity.

Multi-vendor marketplace

A store where many independent sellers list and sell, which is what makes Amazon Amazon. It needs three coordinated pieces, a buyer app, a seller panel, and an admin console, plus commission logic and split payouts, which is why it costs several times a single-seller store.

Split payouts

Marketplace payment plumbing that collects from the buyer, takes the platform's commission, and pays each seller their share, handling refunds and disputes along the way. Built on providers like Stripe Connect, it's one of the priciest marketplace features at roughly $10,000 to $20,000.

Fulfillment

The physical layer: storing inventory, picking, packing, shipping, and handling returns. It's invisible in the app and often the largest real cost of an e-commerce business, and it's the reason a marketplace's software budget understates the true cost of operating one.

Off-the-shelf platform

A ready-made commerce system (Shopify, WooCommerce, BigCommerce) you configure instead of build. It trades a monthly fee and some flexibility for launching in days with payments, catalog, and checkout already solved. For most single-seller stores, it wins.

SKU and catalog

A SKU is one distinct sellable item; the catalog is all of them, with prices, variants, images, and stock. Catalog scale and complexity, thousands of SKUs, many variants, multiple sellers, drive far more cost than the storefront's look, because managing inventory data is the hard part.

And the same warning that applies to every marketplace applies double here: a marketplace has a two-sided chicken-and-egg problem on top of the three-app build. No buyers come without sellers, and no sellers stay without buyers. You're paying to build three apps and then paying again, in time and marketing, to solve the liquidity problem the software can't. That's the real reason to be sure you need a marketplace before you fund one.

1. Fulfillment and logistics

   For a physical-goods business, storing inventory, picking, packing, shipping, and handling returns is frequently the single largest cost, and it lives entirely outside the app. It's the reason an e-commerce software budget badly understates the cost of running the business.

2. Platform fees or hosting

   Off-the-shelf platforms charge monthly fees plus transaction cuts, roughly $29,000 a year in fees at $1M in sales on a hosted plan. A custom build trades that for hosting ($200 to several thousand a month) and the freedom to use payments directly.

3. Marketplace operations

   A multi-vendor marketplace carries ongoing seller onboarding and support, catalog moderation, dispute resolution, and fraud prevention. These are staffed operating costs that grow with the seller base, not one-time build line items.

4. Maintenance and the doubling rule

   Software maintenance runs 15 to 20 percent of build cost per year, and a widely-cited rule of thumb says to budget your build cost and then double it for year-one operations across hosting, payments, marketing, and support. The build is the down payment.

The takeaway isn't that e-commerce is unaffordable; it's that the software is the down payment, not the price. When you plan an app like Amazon, model fulfillment, platform or hosting fees, payment processing, and marketplace operations alongside the build, or a project that fit your budget will run a business that doesn't. This is exactly the modeling most clone-cost articles skip.

The clean rule: for a single-seller shop under roughly $500,000 in revenue, an off-the-shelf platform almost always wins on speed and total cost. Above that, or for a multi-vendor marketplace, complex B2B logic, or deep back-office integration, custom development wins on three-year total cost of ownership and on the experience itself³. The marketplace is the one case where there's rarely a real off-the-shelf answer, because the platforms' multi-vendor add-ons are thin, and a serious marketplace needs custom commission structures, seller dashboards, dispute resolution, and split payments. That's the build worth commissioning; a plain store usually isn't.

The 2026 translation is a scoping discipline worth real money. Pick one category and win it. A single-category store or a single-vertical marketplace is dramatically cheaper to build, faster to launch, and easier to fill with supply and demand than a general platform⁵⁶. Books were a deliberate choice: a huge catalog, easy to ship, no expiry. Your equivalent, a category where you have an edge in supply, trust, or curation, is the whole strategy. Amazon earned the everything store over decades. You start with the bookstore.

Start with the decision that saves the most: custom software vs off-the-shelf covers when to buy and when to build. For other marketplace shapes, our breakdowns of an app like DoorDash and an app like Airbnb apply the same method, and how to scope an MVP keeps a first build lean.

And if you'd rather have a number than a range, our free 48-hour build plan turns your idea into a buy-or-build recommendation and, where a build makes sense, a written scope and a fixed quote. No sales call, no obligation. Ready to move? Start a build.