OSI-licensed open source
Order management software tracks orders from placement through payment, fulfilment, shipping and returns. Open-source options give developers control over the data model and workflows, and many double as headless commerce backends or ERP modules.
This page includes commerce engines with strong order models (Medusa, Saleor, Sylius, Bagisto, Vendure) and ERP suites with order processing (ERPNext, Odoo Community, Apache OFBiz). Licences were read from the repositories, and dual-licensed projects are noted in the entry.
Tools, licences and pricing checked against vendor and repository pages on November 7, 2026.
| Tool | Best for | Pricing | Licence |
|---|---|---|---|
| Medusa | JavaScript teams building custom commerce backends | Free, open source (self-hosted); managed Medusa Cloud available (see vendor pricing) | MIT |
| Saleor | Headless commerce with GraphQL APIs | Free, open source (self-hosted); Saleor Cloud available (see vendor pricing) | BSD-3-Clause |
| Apache OFBiz | Java teams needing ERP-style order processing | Free, open source | Apache-2.0 |
| ERPNext | Small and midsize businesses wanting integrated ERP | Free, open source (self-hosted); Frappe Cloud hosting available (see vendor pricing) | GPL-3.0 |
| Odoo Community | Businesses wanting modular apps for sales and stock | Free, open source (Community); paid Enterprise and Odoo Online available (see vendor pricing) | LGPL-3.0 |
| Sylius | PHP teams building bespoke commerce | Free, open source | MIT |
| Bagisto | Laravel teams wanting ready-made commerce | Free, open source (paid extensions available) | MIT |
| Vendure | TypeScript teams building headless commerce | Free, open source (GPL-3.0 community edition; commercial licence also offered) | GPL-3.0 |
Best for: JavaScript teams building custom commerce backends · Free, open source (self-hosted); managed Medusa Cloud available (see vendor pricing)
Medusa is an open-source headless commerce platform built on Node.js with modules for orders, carts, inventory and payments. Developers extend it with workflows and custom modules.
Best for: Headless commerce with GraphQL APIs · Free, open source (self-hosted); Saleor Cloud available (see vendor pricing)
Saleor is a GraphQL-first, headless commerce platform written in Python and Django. It handles orders, products, channels and payments, with a dashboard.
Best for: Java teams needing ERP-style order processing · Free, open source
Apache OFBiz is an open-source enterprise resource planning framework that includes order, catalogue, inventory and accounting components.
Best for: Small and midsize businesses wanting integrated ERP · Free, open source (self-hosted); Frappe Cloud hosting available (see vendor pricing)
ERPNext is an open-source ERP built on the Frappe framework, covering sales orders, purchasing, inventory, accounting and manufacturing.
Best for: Businesses wanting modular apps for sales and stock · Free, open source (Community); paid Enterprise and Odoo Online available (see vendor pricing)
Odoo is a modular business suite with open-source Community edition that includes sales, inventory and invoicing apps. Enterprise edition adds proprietary modules.
Best for: PHP teams building bespoke commerce · Free, open source
Sylius is an open-source, API-first eCommerce framework built on Symfony and PHP. It provides orders, payments, shipping and customer management for custom shops.
Best for: Laravel teams wanting ready-made commerce · Free, open source (paid extensions available)
Bagisto is a Laravel-based open-source eCommerce platform with multi-channel, multi-currency and order management features.
Best for: TypeScript teams building headless commerce · Free, open source (GPL-3.0 community edition; commercial licence also offered)
Vendure is a headless commerce framework built with TypeScript and Node.js, exposing a GraphQL API, with order, promotion and fulfilment workflows.
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| If you need… | Start with |
|---|---|
| JavaScript headless commerce | Medusa, Vendure |
| GraphQL and Python | Saleor |
| ERP with orders, stock and accounting | ERPNext, Odoo Community, Apache OFBiz |
| PHP and Symfony shops | Sylius |
| Laravel shops | Bagisto |
Quick answers to common questions
An OMS manages orders across channels, tracking payment, inventory allocation, fulfilment, shipping and returns.
An OMS focuses on order flow. An ERP also covers accounting, purchasing and manufacturing. Small firms often start with an ERP module.
No. Shopify is a proprietary hosted platform. The projects here are self-hostable alternatives.
Vendure's repository offers GPL-3.0 and a separate commercial licence. Review which suits your use before building.
List it on TechLogHub and we'll review it for this guide.
