Add a marketplace – and own every part of it

Own the code and the data, run it on your infrastructure, and keep what you build – a curated third-party marketplace with zero GMV fees.

Open sourceYour infrastructureZero GMV fees

Same problem, opposite ends

Marketplacer and Mercur both put third-party vendors on your store – from opposite ends. Marketplacer is a closed SaaS you rent. Mercur is an open platform you own. Here is what owning it gives you.

Zero GMV fees

The license is your only platform cost. Your success isn't taxed.

Own the source

Open source, full source for licensees – an engine you can read, audit, and extend.

Your infrastructure

Any cloud, on-premise, or air-gapped. Data residency is your decision.

Built on the most popular framework

Standard JavaScript and TypeScript – any web developer can work on it, no certified specialists to hire.

Additive, not disruptive

Add a third-party layer without replatforming, or stand up a full marketplace from scratch.

No vendor lock-in

Keep the version you paid for and everything built on it – forever.

Marketplacer vs Mercur, by architecture

The differences that decide this are structural, not feature-by-feature.

	Marketplacer	Mercur
Core technology	Closed, vendor-only	Open source (MIT), public
Enterprise code	Black box	Full source access for licensees
Integrations	Separate products & platforms	Built into one platform
Customization	Limited, on the vendor's roadmap	Official extension points, your own layer
Deployment	Vendor cloud only	Any cloud or on-premise
Cost model	Grows with your GMV	Zero GMV fees
Exit	Rebuild	You keep what you paid for
Developer pool	Vendor specialists	Any web developer

Your success isn't taxed

Marketplacer charges an implementation fee, a subscription, a percentage of transactions, and usage fees. With Mercur you pay to build and run the platform – not a cut of every sale.

Grows with your GMV / MarketplacerFlat platform cost / Mercur

Tax

LaunchYour turnoverScale

At scale, you pay more every year for the same platform.

When Marketplacer is the right call

Marketplacer's real strength is its network – a curated network of thousands of vendors a retailer can tap from day one. Software doesn't beat that, and we won't pretend otherwise.

Choose Marketplacer

You don't have your own vendors and you want a ready, curated network from day one – and neither a cost that grows with your GMV nor running on their cloud stands in your way.

Choose Mercur

You bring your own vendorsYou want to own the code and the dataYou need on-premise or data residencyYou want a predictable cost that doesn't grow with your success

Three ways to go deeper

Read the comparison, then follow the thread that matters to you.

Add a marketplace to your store

How the 3P layer works alongside what you run.

Learn more

Core and Enterprise

The full engine, and what serious admins run.

Learn more

Security

Read the code and the controls yourself.

Learn more

Bring your vendors, own the platform

Read the comparison, run the stack yourself, then talk to us about the marketplace layer you keep – added to what you already run, with no cut of every sale.