Mercur is an open-source, headless platform for building multi-vendor marketplaces, built on Medusa v2. Its marketplace engine includes vendor management, catalogs, offers, split orders, commissions, and payouts; vendor payouts can use Stripe Connect. A typed REST API covers admin, vendor, and storefront scopes. Teams can run Mercur in their own cloud, on-premise, or in an air-gapped environment. The MIT-licensed Open Source plan costs 0.00 USD per free, but the team handles implementation, deployment, and maintenance. Managed hosting through Mercur Cloud is purchased separately. The Open Source edition lists HTTP-only session authentication, per-vendor data isolation, and TLS in transit at the deployment layer. Enterprise adds financial settlement, BuyBox, vendor integrations, and access controls. It includes supported Shopify and Magento / Adobe Commerce connectors, while connections to an organization's own ERP, PIM, OMS, or custom feeds are scoped separately. Enterprise licensing is quoted for each marketplace, and implementation is scoped separately. Enterprise support includes a Platform Specialist, dedicated Slack and email, architectural guidance, and an SLA for defects and incidents in code Mercur maintains.
Who it is for
Mercur Open Source suits teams able to implement, deploy, and maintain a marketplace themselves. Enterprise is aimed at businesses seeking added capabilities and platform maintenance.
What is good
- MIT-licensed marketplace core costs 0.00 USD per free.
- Supports self-hosted and air-gapped deployment.
- Includes vendor management, split orders, commissions, and payouts.
- Typed REST API spans admin, vendor, and storefront scopes.
- Enterprise includes a designated Platform Specialist.
What to know first
- Open Source teams handle implementation, deployment, and maintenance.
- Managed Mercur Cloud hosting is purchased separately.
- Enterprise license price is quoted, not listed.
- Connecting an organization's own systems requires separate implementation work.
Verdict
Mercur provides a self-managed marketplace core and an Enterprise route with additional modules, integrations, and support. Teams should account for separate implementation work and, for managed hosting, a separate purchase.
Mercur plans and pricing
All plansCompared on online marketplace software
- Free plan
- Yes
- Commission rules
- Yes
- Automated payouts
- Yes
- Seller onboarding
- Yes
- Product types
- mixed
- Multi-currency
- Yes
- Shipping workflows
- Yes
