How to Build Your Own Marketplace: Why You Probably Do Not Need Another Amazon
Launching your own online marketplace sounds like an attractive business model.
Sellers add their products or services, customers place orders, the platform earns commissions, and the catalogue grows without the marketplace owner having to purchase and stock every product.
And sooner or later, someone says:
“Why don't we build our own Amazon?”
That is usually the wrong place to start.
Not because the marketplace model is dead. Quite the opposite.
There is still plenty of room for new platforms in Europe. But trying to compete with Amazon, eBay, Zalando, Allegro or other major marketplaces simply by offering another huge general-purpose catalogue is extremely difficult.
A better question is:
What can your marketplace do that a large horizontal marketplace does not do particularly well?
That is where interesting opportunities begin.
Europe probably does not need another “everything store”
Large marketplaces already solve one problem extremely well: scale.
Millions of products.
Established logistics.
Huge customer bases.
Advanced advertising systems.
Massive technology budgets.
A new marketplace cannot realistically beat them by simply saying:
“We also have clothes, electronics, furniture, cosmetics and tools.”
Technically, you can build such a platform.
The harder question is why anyone should use it.
If there is no convincing answer, the problem is not the software.
A more attractive design, a mobile app or another seller-dashboard feature will not create the missing business model.
A successful new marketplace needs a reason to exist.
That reason could be:
a specialised industry;
a specific region;
professional buyers;
digital products;
services;
a network of existing suppliers;
a professional community;
or a category where customers need much more than a simple product image and price.
A niche marketplace is not a smaller Amazon
This distinction is important.
A large general marketplace wins through scale.
A niche marketplace should win through depth.
Imagine a customer looking for a phone charger.
A large marketplace is usually perfectly adequate.
Now replace that charger with:
an industrial component;
a specialist automotive part;
professional greenhouse equipment;
construction products;
medical or laboratory equipment;
specialised machinery;
or a product that needs compatibility information and technical documentation.
The buying process immediately becomes more complex.
Customers may need:
detailed specifications;
compatibility filters;
technical documents;
certificates;
professional advice;
specialised categories;
supplier information;
industry-specific shipping;
or requests for quotation.
A general marketplace cannot build a perfect buying experience for every industry.
A specialised platform can.
That is one of the strongest reasons to create an independent marketplace.
1. Regional marketplaces
Europe is made up of highly diverse regional and national markets.
Local producers, independent shops, artisans, food businesses and specialist retailers often operate successfully offline while remaining fragmented online.
A regional marketplace can bring them together.
For example, a platform could focus on:
local food producers;
regional fashion brands;
independent furniture manufacturers;
local flowers and gifts;
craft products;
regional services;
or businesses from a particular city or area.
The advantage is not that the marketplace contains more products than Amazon.
It is that the marketplace understands the region.
Local delivery.
Local pickup.
Local language.
Local suppliers.
Products that may never appear on a large international platform.
A marketplace serving one region well can create much more value than a generic platform trying to serve everyone.
2. Vertical and industry marketplaces
Vertical marketplaces are particularly interesting because they can be built around the actual workflow of a specific industry.
Examples include:
automotive parts;
construction materials;
professional tools;
agricultural equipment;
furniture components;
jewellery;
beauty products;
industrial supplies;
electronics components;
or hospitality supplies.
A specialised marketplace can support filters, attributes and workflows that make sense for that particular sector.
The catalogue might be much smaller than Amazon's.
That does not matter.
If a professional buyer can find the right product faster and with better information, the platform is doing its job.
For a niche marketplace, relevance is more important than catalogue size.
3. B2B marketplaces
A marketplace does not have to be consumer-focused.
For many European businesses, a B2B marketplace may make more sense than another B2C platform.
Consider a distributor that already works with dozens of manufacturers and hundreds of business customers.
Traditionally, the distributor might collect product data from suppliers and resell everything through its own store.
A marketplace model creates another possibility.
Suppliers can manage their own products.
They can receive and process orders.
Different sellers can operate inside the same catalogue.
The platform can manage commissions, moderation and customer access.
In this scenario, the value of the marketplace is not mass consumer traffic.
It is the infrastructure connecting an existing business network.
A B2B platform might provide:
one catalogue for multiple suppliers;
professional product data;
supplier accounts;
company-specific pricing;
seller management;
centralised orders;
and integrations with ERP, CRM or logistics systems.
This can be much more realistic than trying to create a mass-market consumer marketplace from scratch.
4. Service marketplaces
Not every marketplace needs physical products.
The seller can be a professional or a service company.
A specialised service marketplace might connect customers with:
installers;
designers;
consultants;
repair companies;
training providers;
freelance professionals;
equipment rental businesses;
or specialists from a particular industry.
The mechanics remain familiar.
Providers create profiles.
Customers discover services.
The platform manages requests or orders.
Customers can leave reviews.
Providers can communicate with customers.
The marketplace may charge a commission, subscription or lead fee.
Again, specialisation usually matters.
A marketplace for “every service imaginable” immediately competes with very large platforms.
A marketplace designed around one profession or one industry can build much stronger workflows.
5. Digital product marketplaces
Digital goods create another attractive marketplace model.
A platform may allow creators or companies to sell:
templates;
software;
plugins;
educational materials;
graphics;
documents;
ebooks;
digital assets;
professional resources;
or downloadable files.
There is no physical warehousing or last-mile delivery.
Instead, the platform needs to solve other problems:
seller management;
digital fulfilment;
licensing;
product access;
content moderation;
payments;
tax handling;
and customer accounts.
For some businesses, a digital marketplace may be significantly easier to scale internationally than a marketplace for physical products.
The marketplace itself is not the first thing you should build
When companies start discussing a marketplace project, the conversation often moves immediately toward technology.
Which framework?
Which server?
Which design?
Which mobile app?
Which payment gateway?
These questions matter.
But they come later.
Before development, the business model should answer much more fundamental questions.
Who can become a seller?
How are sellers verified?
What can they sell?
Does the platform approve products?
Who owns the relationship with the buyer?
How is the marketplace commission calculated?
Who handles customer support?
When does the seller become entitled to funds?
How are cancellations and refunds processed?
Who is responsible for shipping?
Can a seller employ multiple staff members?
How are reviews handled?
What happens when a prohibited or unsafe product is listed?
Only when these questions are clear does it become possible to design the right platform.
A marketplace is not primarily a website. It is a system of relationships between the platform, sellers and buyers.
The website is the interface to that system.
Design one complete order before designing the whole marketplace
A useful way to test a marketplace concept is to stop thinking about thousands of sellers.
Start with one.
A seller applies to join.
The marketplace verifies the seller.
The seller creates a storefront.
Products or services are added.
The marketplace may review them.
A customer places an order.
The seller receives the relevant order information.
The marketplace calculates its commission.
The seller's earnings appear in their account.
The order is fulfilled.
The buyer can communicate with the seller or leave a review.
That single workflow reveals far more about the real platform requirements than a list of fifty planned features.
Once this process works correctly for one seller and one customer, it can be scaled.
Where do the first sellers come from?
This is one of the hardest marketplace problems.
Customers do not want an empty marketplace.
Sellers do not want to join a platform without customers.
That creates the classic two-sided marketplace problem.
This is another reason why niche platforms can be more practical.
They may already have one side of the market.
A distributor already knows its suppliers.
An industry association already has members.
A regional organisation already works with local businesses.
A professional community already has specialists.
A retailer may already have traffic and customer relationships.
In these cases, the marketplace is not starting from zero.
It becomes digital infrastructure for an ecosystem that already exists.
That dramatically changes the economics of the project.
Do you actually need a marketplace?
Sometimes the correct answer is no.
If a company only sells its own inventory, it probably needs a strong ecommerce store, not a marketplace.
If suppliers simply provide product feeds but never manage their own orders or accounts, a full marketplace architecture may be unnecessary.
If there is no clear idea of who the first sellers will be or why customers will use the platform, investing heavily in marketplace development is premature.
A marketplace starts to make sense when independent sellers genuinely need to:
manage their own products;
receive orders;
have their own seller accounts;
operate separate storefronts;
track earnings;
communicate with customers;
or manage their own part of the sales process.
That is where marketplace functionality becomes useful rather than decorative.
How does a marketplace make money?
The most familiar model is a commission on each completed transaction.
The marketplace keeps a percentage.
The remaining amount is attributed to the seller.
But there are many other models.
A marketplace can use:
transaction commissions;
seller subscriptions;
listing fees;
promoted listings;
premium seller features;
payment fees;
logistics fees;
lead-generation fees;
or a combination of these.
The important point is that monetisation should be designed before launch.
It directly affects the marketplace's payment flows, accounting logic and seller balance architecture.
Build from scratch or use an existing marketplace platform?
Once the business model is clear, the next decision is technical.
There are several approaches.
Custom development
Building from scratch offers maximum freedom.
It can make sense when the marketplace has highly unusual workflows that cannot reasonably be adapted to an existing platform.
The downside is that you are also rebuilding all the basics:
seller accounts;
catalogue management;
orders;
commissions;
moderation;
seller permissions;
payments;
communications;
and administration.
That increases both cost and time to market.
A ready marketplace foundation
Another approach is to start with an existing ecommerce and marketplace foundation and adapt it around the business model.
Instead of spending the first development phase recreating seller registration, order management and catalogue infrastructure, the project can focus on what makes the marketplace unique.
That might include:
industry-specific product data;
design;
payment integrations;
shipping;
ERP integration;
business-specific seller workflows;
or specialised customer features.
Marketplace rental
For a new concept, renting the platform can be useful as an MVP approach.
The initial objective is not necessarily to build the final ten-year platform.
It is to prove that sellers want to join and buyers want to use it.
If the model works, the marketplace can then be expanded and customised further.
European marketplaces also need compliance by design
For an EU marketplace, compliance cannot simply be added at the end of the project.
The Digital Services Act introduced specific obligations for online marketplaces, including seller traceability. Marketplaces must obtain certain identifying information from traders before allowing them to sell and must make it possible for consumers to identify the seller responsible for an offer.
For marketplaces selling consumer products, the General Product Safety Regulation is also important. Marketplace interfaces need to support required product and manufacturer information, and platforms have obligations around dangerous products and recalls.
Cross-border commerce adds VAT considerations as well. The EU's One Stop Shop system allows businesses to handle certain cross-border B2C VAT obligations through a single Member State, while VAT rates and specific requirements still vary across countries.
That means a European marketplace should be designed from the beginning around questions such as:
seller identity and verification;
mandatory seller information;
product compliance data;
consumer rights;
VAT;
invoicing;
product recalls;
cross-border sales;
and the responsibilities of the platform itself.
The exact legal requirements depend on the marketplace model, country, product category and role of the platform, so specialist legal and tax advice is still necessary.
But technically, the platform should be capable of supporting these processes.
What kind of marketplace has a realistic opportunity?
The strongest marketplace ideas today are often not the biggest ones.
They are the most focused.
A viable project might be:
a regional marketplace;
an industry-specific marketplace;
a B2B supplier platform;
a marketplace for digital products;
a specialised services platform;
a marketplace built around an existing professional community;
or an established ecommerce business expanding from first-party sales into third-party sellers.
None of these projects needs to become Amazon.
They need to solve a particular problem better than Amazon does.
That is a much more realistic goal.
Build your marketplace with Ewonta
Ewonta provides a marketplace foundation based on PrestaShop for businesses that do not want to develop every basic marketplace component from scratch.
The platform can support key marketplace processes such as:
seller accounts and storefronts;
seller products and services;
seller and product moderation;
orders;
commissions;
seller financial operations and balances;
customer-to-seller communication;
seller ratings and reviews;
seller employees and permissions;
and different marketplace business models.
This foundation can be adapted for niche marketplaces, regional platforms, B2B projects, digital products and service marketplaces.
The marketplace architecture is based on PrestaShop, so the project remains extensible through modules, integrations and custom development rather than being locked into a simple closed website builder.
Ewonta also supports a gradual launch approach.
A project can start with a hosted or rental model to validate the concept, then expand as the seller base, catalogue and business requirements grow.
The technology, however, should not be the first decision.
Start with four questions:
Who will sell?
What will they sell?
Who will buy?
Why is your marketplace a better place for these two sides to meet?
If you have strong answers to those questions, building the marketplace becomes the next step — not the starting point.
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