What is Mercur used for?

Mercur is an open-source headless platform for building multi-vendor marketplaces with vendor onboarding, commissions, payouts, a storefront, and an admin console, built on Medusa. It is a good fit for launching a multi-vendor marketplace and replacing a revenue-sharing marketplace SaaS.

Is Mercur open source?

Yes. Mercur is open source under the MIT licence. Its source code is on GitHub at mercurjs/mercur and is written mainly in TypeScript.

Yes. Mercur is open source, so the software itself is free to use.

Can I self-host Mercur?

Yes. Mercur can be self-hosted on your own server or infrastructure.

What is Mercur an alternative to?

Mercur is an open-source alternative to Etsy, eBay, Faire and Shopee. Other open-source alternatives to Etsy include GrandNode 2, Shuup and Bagisto.

Is Mercur actively maintained?

Yes. The most recent commit to Mercur was on 2 October 2026, and the latest release is v2.3.5, published on 17 September 2026. The project has 1.8k stars on GitHub.

Mercur: open-source alternative to Etsy, eBay, Faire

About Mercur

Mercur is an open-source, headless platform for building multi-vendor marketplaces and is presented as an alternative to Mirakl. It adds vendor onboarding, multi-vendor catalogs, offers, commissions, and automated payouts on top of a commerce core. The topics point to Medusa as that core. It is written in TypeScript and released under the MIT license.

The platform supports B2C, B2B, and hybrid marketplaces and includes a storefront, a vendor panel, an admin console, and integrations. The README stresses ownership: you self-host on your own infrastructure with full source access, and there is no percentage of gross merchandise value, no per-transaction fee, and no vendor lock-in.

Documentation, a live demo, and a Discord community are available. Mercur suits teams launching a marketplace who want to avoid both a revenue-sharing SaaS platform and a from-scratch build, and who have the engineering capacity to operate and customize the system.

Key features

Vendor onboarding and management
Multi-vendor catalogs and offers
Commission rules and automated payouts
Storefront, vendor panel, and admin console
B2C, B2B, and hybrid marketplace support
Built on Medusa commerce core

Good fit for

→Launching a multi-vendor marketplace
→Replacing a revenue-sharing marketplace SaaS

Built with: TypeScript
Tags: marketplace; multi-vendor; ecommerce; medusa; headless-commerce; typescript; payouts; self-hosted

Mercur: questions and answers

What is Mercur used for?: Mercur is an open-source headless platform for building multi-vendor marketplaces with vendor onboarding, commissions, payouts, a storefront, and an admin console, built on Medusa. It is a good fit for launching a multi-vendor marketplace and replacing a revenue-sharing marketplace SaaS.
Is Mercur open source?: Yes. Mercur is open source under the MIT licence. Its source code is on GitHub at mercurjs/mercur and is written mainly in TypeScript.
Is Mercur free?: Yes. Mercur is open source, so the software itself is free to use.
Can I self-host Mercur?: Yes. Mercur can be self-hosted on your own server or infrastructure.
What is Mercur an alternative to?: Mercur is an open-source alternative to Etsy, eBay, Faire and Shopee. Other open-source alternatives to Etsy include GrandNode 2, Shuup and Bagisto.
Is Mercur actively maintained?: Yes. The most recent commit to Mercur was on 2 October 2026, and the latest release is v2.3.5, published on 17 September 2026. The project has 1.8k stars on GitHub.