Mercur
Rzeszow, Poland
What it is
Mercur is an open-source, headless, multi-vendor marketplace platform built on Medusa v2. Its core covers vendor management, catalogs, offers, split orders, commissions, and payouts, with vendor payouts through Stripe Connect. A typed REST API serves admin, vendor, and storefront scopes. Teams can deploy Mercur in their own cloud, on-premise, or in an air-gapped environment; managed Mercur Cloud hosting is purchased separately. The MIT-licensed Open Source plan is free, self-hosted, and requires the team to handle implementation, deployment, and maintenance. Enterprise adds financial settlement, BuyBox, vendor integrations, and enterprise access controls. It also includes Shopify and Magento / Adobe Commerce connectors, a Platform Specialist, dedicated support channels, architectural guidance, and an SLA for defects and incidents in maintained code. Connecting an organization’s own ERP, PIM, OMS, or custom feeds requires separate implementation work.
For and against
For
- Open-source MIT-licensed marketplace core
- Vendor management and split orders
- Stripe Connect vendor payouts
- Typed REST API across marketplace scopes
- Self-hosted or air-gapped deployment
Against
- Implementation and maintenance remain with the team
- Managed hosting costs extra
- Custom ERP and PIM connections need separate work
- Enterprise pricing is quoted
The verdict
Mercur provides a flexible foundation for multi-vendor marketplaces with self-hosting and API access. Teams should account for implementation responsibilities and separate integration work before choosing it.
Who it suits
Mercur suits teams able to implement, deploy, and maintain a marketplace themselves. Enterprise is intended for businesses needing added modules, connectors, and platform support.
Plans and prices
Mercur Open Source
MIT-licensed marketplace core · self-hosted · team handles implementation, deployment, and maintenance
Read 30 Sep 2026 · mercurjs.com
Mercur Enterprise
Complete Enterprise suite · license quoted for your marketplace · implementation scoped separately · zero GMV fees
Read 30 Sep 2026 · mercurjs.com
On the record
- API
- Mercur provides a typed REST API across admin, vendor, and storefront scopes.mercurjs.com · read 30 Sep 2026
- Compliance
- The security page lists GDPR and a data processing agreement and says ISO 27001 controls are built by design for Open Source; Enterprise adds GDPR tooling and audit evidence for ISO 27001 controls.mercurjs.com · read 30 Sep 2026
- Core capabilities
- The open-source engine includes vendor management, catalogs, offers, split orders, commissions, and payouts.mercurjs.com · read 30 Sep 2026
- Deployment
- Mercur can run on a customer's cloud, on-premise, or in an air-gapped environment; managed hosting through Mercur Cloud is purchased separately.mercurjs.com · read 30 Sep 2026
- Enterprise modules
- Enterprise adds financial settlement, BuyBox, vendor integrations, and enterprise access controls.mercurjs.com · read 30 Sep 2026
- Enterprise support
- Enterprise includes a designated Platform Specialist, dedicated Slack and email channel, architectural guidance, and an SLA for defects and incidents in code Mercur maintains.mercurjs.com · read 30 Sep 2026
- Integrations
- Enterprise includes supported Shopify and Magento / Adobe Commerce connectors; integrations to an operator's ERP, PIM, OMS, or custom feeds are scoped separately.mercurjs.com · read 30 Sep 2026
- Intended users
- Mercur describes Open Source as suited to teams that can implement, deploy, and maintain the marketplace themselves, and Enterprise for businesses needing added capabilities and platform maintenance.mercurjs.com · read 30 Sep 2026
- Limit
- Building the marketplace and connecting an organization's own ERP, PIM, OMS, or custom feeds are separate implementation work.mercurjs.com · read 30 Sep 2026
- Open-source support
- Open Source users receive documentation and community channels, including a public issue tracker and Discord.mercurjs.com · read 30 Sep 2026
- Payments
- Open Source supports vendor payouts via Stripe Connect.mercurjs.com · read 30 Sep 2026
- Product
- Mercur is an open-source, headless multi-vendor marketplace platform built on Medusa v2.mercurjs.com · read 30 Sep 2026
- Security
- The open-source edition lists HTTP-only session authentication, per-vendor data isolation, and TLS in transit at the deployment layer.mercurjs.com · read 30 Sep 2026
