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Mercur

mercurjs.com

Free plan WebAPISelf-hosted
Visit mercurjs.com
Spec score 7.6 #22 of 34 in Online Marketplace Software

What it is

Mercur is an open-source, headless platform for building multi-vendor marketplaces on Medusa v2. Its MIT-licensed core covers vendor management, catalogs, offers, split orders, commissions, and payouts, including vendor payouts through Stripe Connect. A typed REST API spans admin, vendor, and storefront scopes. Teams can deploy Mercur in their own cloud, on-premise, or an air-gapped environment; managed Mercur Cloud hosting is separate. Open Source 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 enterprise access controls, plus Shopify and Magento / Adobe Commerce connectors. Enterprise support includes a Platform Specialist, dedicated Slack and email, architectural guidance, and an SLA for maintained-code defects and incidents. Enterprise licensing is quoted. Connecting an organization’s ERP, PIM, OMS, or custom feeds and building the marketplace require separate implementation work.

Spec sheet

Product
Mercur is an open-source, headless multi-vendor marketplace platform built on Medusa v2.Read 30 Sep 2026 · mercurjs.com
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.Read 30 Sep 2026 · mercurjs.com
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.Read 30 Sep 2026 · mercurjs.com
API
Mercur provides a typed REST API across admin, vendor, and storefront scopes.Read 30 Sep 2026 · mercurjs.com
Integrations
Enterprise includes supported Shopify and Magento / Adobe Commerce connectors; integrations to an operator's ERP, PIM, OMS, or custom feeds are scoped separately.Read 30 Sep 2026 · mercurjs.com
Security
The open-source edition lists HTTP-only session authentication, per-vendor data isolation, and TLS in transit at the deployment layer.Read 30 Sep 2026 · mercurjs.com
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.Read 30 Sep 2026 · mercurjs.com
Headquarters
Rzeszow, PolandRead 23 Sep 2026 · mercurjs.com
Core capabilities
The open-source engine includes vendor management, catalogs, offers, split orders, commissions, and payouts.Read 30 Sep 2026 · mercurjs.com
Enterprise modules
Enterprise adds financial settlement, BuyBox, vendor integrations, and enterprise access controls.Read 30 Sep 2026 · mercurjs.com
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.Read 30 Sep 2026 · mercurjs.com
Limit
Building the marketplace and connecting an organization's own ERP, PIM, OMS, or custom feeds are separate implementation work.Read 30 Sep 2026 · mercurjs.com
Open-source support
Open Source users receive documentation and community channels, including a public issue tracker and Discord.Read 30 Sep 2026 · mercurjs.com
Payments
Open Source supports vendor payouts via Stripe Connect.Read 30 Sep 2026 · mercurjs.com

Plans and prices

Mercur Open Source Free MIT-licensed marketplace core · self-hosted · team handles implementation, deployment, and maintenance Read 30 Sep 2026 · mercurjs.com
Mercur Enterprise Priced on request Complete Enterprise suite · license quoted for your marketplace · implementation scoped separately · zero GMV fees Read 30 Sep 2026 · mercurjs.com

Every Mercur plan and price →

Strong points and limits

Strong points

  • MIT-licensed core at free
  • Vendor management, catalogs, offers, and payouts
  • Typed REST API across three scopes
  • Cloud, on-premise, or air-gapped deployment
  • Enterprise connectors and dedicated support

Limits

  • Self-hosted users handle implementation and maintenance
  • Managed Mercur Cloud hosting costs separately
  • Custom ERP, PIM, and OMS connections require separate work

Who it suits

Mercur Open Source suits teams able to implement, deploy, and maintain a marketplace themselves. Enterprise is for businesses needing added modules, platform maintenance, and dedicated support.

Verdict

Mercur provides a self-hostable marketplace core with vendor, order, commission, and payout capabilities plus a typed API. Enterprise extends it with settlement, integrations, controls, and support, while implementation and organization-specific connections remain separate work.

Where Specifiction places it

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