Every marketplace is a platform, but not every platform is a marketplace. A platform is software that other people build on or transact through. A marketplace is one specific type of platform: it matches buyers with sellers and facilitates the transaction between them. That nesting is exactly why the two terms get tangled.
The confusion costs real money when you are deciding what to build. Choosing “platform” or “marketplace” determines who owns the inventory, who sets the price, how cash moves, and how you make money. Get the model wrong and you end up running operations the model was never designed to support.
This guide draws the line cleanly. You will see how a platform differs from a marketplace, where the ecommerce version of the question lands (a Shopify-style platform versus an Amazon-style marketplace), and how to decide which one fits the business you are actually trying to grow.
What is a platform?
A platform is software that lets other parties build on it, sell through it, or transact across it, rather than the platform owner doing everything itself. It supplies the shared infrastructure (accounts, payments, rules, distribution) and lets third parties create the value on top. Operating systems, app stores, payment networks, and marketplaces are all platforms.
The defining trait is that a platform creates value by connecting or enabling others, not by producing the end product alone. Apple’s iOS is a platform because developers build apps on it. Stripe is a platform because businesses move money through it. Shopify is a platform because merchants run their own stores on it.
Because “platform” is so broad, it covers very different business models. Some platforms charge subscription fees for access to the software. Some take a cut of transactions. Some monetize data or advertising. What unites them is the structure: one party provides the rails, many parties create the activity that flows over them. A two-sided network is a particular shape of platform where two distinct user groups create value for each other.
What is a marketplace?
A marketplace is a platform that matches buyers and sellers and facilitates the transaction between them, usually taking a commission on each sale. It does not own the inventory or perform the service itself. Instead it provides discovery, trust, and payment infrastructure so independent sellers can reach buyers they could not reach alone.
Amazon’s third-party marketplace, Etsy, Airbnb, Uber, and eBay are all marketplaces. The platform never owns most of what is sold on it. Hosts own the homes, drivers own the cars, artisans own the goods. The marketplace owns the matching layer and earns money by taking a percentage of the value that flows through it.
Because a marketplace sits on both sides of a transaction, it has to solve problems a single-sided business never faces: balancing supply and demand, building trust between strangers, and reaching enough density that both sides find what they need. That is the core of running a two-sided marketplace, and it is why marketplaces are harder to launch than they look.
Why a marketplace is a type of platform
A marketplace is a platform with a specific job: it connects two parties and enables a transaction between them. Every marketplace is therefore a platform, which is why the words get used interchangeably. But the reverse is not true. A platform that lets one company run its own store, or one developer publish an app, is not a marketplace because it does not match independent buyers and sellers.
The cleanest test is this: does the software match two independent sides who transact with each other, with the operator taking a cut of that transaction? If yes, it is a marketplace. If the software simply gives one party tools to run their own operation, it is a platform but not a marketplace. Hold onto that test, because it is exactly what separates Shopify from Amazon.
Marketplace vs platform: the ecommerce version
In ecommerce, the distinction becomes concrete. An ecommerce platform like Shopify powers one merchant’s own store, where that merchant owns the inventory, sets the prices, and keeps the revenue minus software and payment fees. A marketplace like Amazon or Etsy hosts many independent third-party sellers in one destination and takes a commission on each sale.
With an ecommerce platform, the merchant is the seller and the audience. You are responsible for driving your own traffic to your own domain. According to Shopify’s published pricing, you pay a monthly subscription plus payment processing, and the customer relationship is yours. The platform gives you the storefront, checkout, and admin; the demand is on you.
With a marketplace, the operator owns the destination and the shared audience, and sellers plug into existing demand in exchange for a commission. You get traffic you did not have to build, but you compete in a shared catalog, follow the marketplace’s rules, and usually have a thinner relationship with the buyer. The trade is reach for control.
Who owns inventory, sets price, and how money flows
On an ecommerce platform, the merchant owns the inventory, sets the price, and receives the payment directly. On a marketplace, the third-party seller still owns the inventory and typically sets the price, but the marketplace collects the buyer’s payment, deducts its commission, and pays out the remainder to the seller. The money flows through the operator on a marketplace and around it on a platform.
That money-flow difference is the operational heart of the distinction. A marketplace that collects payment and pays sellers later is splitting one payment into multiple destinations, which is why marketplaces lean on tools built for that job, such as Stripe Connect. An ecommerce platform usually routes the full payment to the single merchant, minus fees.
Here is the side-by-side comparison:
| Dimension | Ecommerce platform (e.g. Shopify) | Marketplace (e.g. Amazon, Etsy) |
|---|---|---|
| What it is | Software to run your own store | Destination that hosts many third-party sellers |
| Sellers | One merchant (you) | Many independent sellers |
| Who owns inventory | The merchant | The third-party seller |
| Who sets the price | The merchant | The seller (within the marketplace’s rules) |
| Who drives demand | The merchant | The marketplace’s shared audience |
| How money flows | Payment goes directly to the merchant | Operator collects, deducts commission, pays out the seller |
| How it makes money | Subscription + payment fees | Commission (take rate) on each transaction, sometimes listing or subscription fees |
| Customer relationship | Owned by the merchant | Largely owned by the marketplace |
| Main challenge | Driving your own traffic | Balancing supply and demand on both sides |
How does each model make money?
An ecommerce platform makes money by charging merchants for access to the software, typically a recurring subscription plus a cut of payment processing. A marketplace makes money by taking a commission, its take rate, on each transaction it facilitates, sometimes alongside listing fees, subscriptions, or promoted placements. The platform charges for tools; the marketplace charges for transactions.
This is more than an accounting detail. A subscription platform earns predictable revenue whether or not the merchant sells much, so its growth depends on adding and retaining merchants. A marketplace earns only when transactions happen, so its revenue scales directly with gross merchandise value and the take rate applied to it. That makes liquidity (matching enough supply with enough demand) the marketplace’s single most important metric.
Take rates vary widely by category. Etsy publicly charges a transaction fee on each sale plus listing and payment-processing fees, while higher-touch managed marketplaces capture a larger share because they do more of the work. There is no universal number, so set your take rate against the value you actually add, not against what feels normal. If your take rate is too low, you cannot fund the operations the model requires.
Which model should you build?
Build an ecommerce platform model if you are selling your own products or want to give individual merchants tools to run their own stores. Build a marketplace if your value comes from matching many independent sellers with buyers and you can credibly aggregate demand for both sides. The deciding question is whether you create value by selling, or by connecting.
Choose the single-store or platform path when you own or control the supply and the hard part is reaching customers. You keep full control of pricing, branding, and the customer relationship, and you avoid the chicken-and-egg problem entirely because there is only one side to fill. The cost is that all demand generation is on you.
Choose the marketplace path when no single seller could aggregate enough demand alone and buyers benefit from selection. You inherit a harder launch, because you must reach both sides at once and reach enough liquidity for the matching to feel reliable. But once both sides are dense, the matching layer becomes a durable advantage that is hard to copy. If you go this route, study the chicken-and-egg problem before you launch, and pick your marketplace software with the payment-splitting and onboarding needs of two sides in mind. A multi-vendor marketplace platform gives you the third-party-seller infrastructure off the shelf.
If you are still mapping the broader category, the platform versus marketplace breakdown covers the wider set of platform types beyond ecommerce.
Once your marketplace is live, the work shifts from definitions to operations: tracking GMV, watching the balance of supply and demand, and running experiments to grow liquidity. That is exactly what Twosided is built for. It connects to Stripe Connect and Sharetribe in about five minutes and answers plain-English questions about your marketplace’s health. Get started with Twosided for free and see your numbers without building dashboards.
FAQs
Is a marketplace the same as a platform?
No. A marketplace is one type of platform, not a synonym for it. A platform is any software others build on or transact through, including operating systems, app stores, and payment networks. A marketplace is the specific kind of platform that matches buyers and sellers and facilitates their transactions, usually taking a commission. Every marketplace is a platform, but most platforms are not marketplaces.
What is the difference between an ecommerce platform and a marketplace?
An ecommerce platform like Shopify gives one merchant the software to run their own store, where that merchant owns the inventory, sets prices, drives traffic, and keeps the revenue minus fees. A marketplace like Amazon or Etsy hosts many independent third-party sellers in one destination, supplies the shared audience, and takes a commission on each sale. The platform sells tools; the marketplace sells access to demand.
Is Amazon a platform or a marketplace?
Amazon is both, which is part of why the terms confuse people. Amazon operates as a retailer selling its own inventory, and it runs a marketplace where millions of independent third-party sellers list products and pay Amazon a commission on each sale. The third-party marketplace portion fits the marketplace definition precisely: many independent sellers, a shared audience, and a take rate on transactions.
Who owns the inventory in a marketplace?
In a marketplace, the independent third-party sellers own the inventory, not the marketplace operator. The operator owns the matching layer, the audience, and the payment infrastructure. Sellers list their own goods or services, usually set their own prices within the marketplace’s rules, and fulfill orders, while the marketplace collects payment, deducts its commission, and pays out the remainder to each seller.
How do marketplaces make money?
Marketplaces make money primarily through a take rate, a commission charged on each transaction they facilitate. Many also add listing fees, seller subscriptions, payment-processing fees, or promoted placements. Because revenue depends on transactions actually happening, a marketplace’s earnings scale with its gross merchandise value and the take rate applied to it, which makes liquidity and matching efficiency the core levers of growth.
Should I build a marketplace or a single-store platform?
Build a single-store or ecommerce platform model if you control your own supply and the hard part is reaching customers, since you keep full control of pricing and the customer relationship. Build a marketplace if your value comes from matching many independent sellers with buyers and no single seller could aggregate that demand alone. The deciding question is whether you create value by selling or by connecting.