When the online store grows, the boxed platform starts making the rules
As an online store grows, specific price lists, inventory, B2B rules, ERP integrations, and performance demands multiply. Shopify charges fees and locks you into a closed ecosystem, WooCommerce slows down easily with a large catalog, and Magento is often too expensive to maintain. The problem is no longer just the design of the store, but the business logic itself.
Hidden fees
Apps, plugins, and transaction commissions gradually drain your margin.
Slow response times
Monolithic e-commerce platforms easily reach their limits with large catalogs or during campaigns.
Process limitations
Custom checkouts, loyalty programs, B2B pricing, or order approvals hit platform limits.
Architecture for B2C and B2B
Support for various price lists, customer groups, multiple currencies, regions, and custom tax rules.
Custom checkout flow
A checkout designed according to your rules, not the limits of a theme or plugin.
Easy ERP integration
Node.js architecture makes it practical to connect WMS, ERP, payment gateways, and logistics services.
E-commerce without limits
Headless architecture for online stores that have outgrown boxed solutions.An e-commerce core for growing brands and B2B sales
Medusa.js was built as an open-source alternative to closed e-commerce platforms. Its modular architecture separates business logic from presentation: Medusa manages products, carts, orders, customers, taxes, and inventory, while the frontend runs independently in Next.js. You can change the design, checkout, and integration logic without rebuilding the entire platform every few years.
Key benefits of Medusa.js architecture
How we build online stores on Medusa
Data analysis
and ERP integration
We map products, warehouses, price lists, orders, and the ERP connection.
Backend development
and custom logic
We implement rules for checkout, shipping, discounts, payments, and B2B processes.
Next.js frontend
development
A fast Next.js storefront connects directly to the Medusa API.
Stress tests
and launch
System behavior is tested against campaigns, larger catalogs, and higher order volumes.
Medusa.js vs. Shopify Plus vs. WooCommerce
Who is Medusa.js not suitable for
Medusa.js is not a solution you can click together over a weekend. It has no theme store or ready-made plugins for every problem. If you want a simple dropshipping store without developers, Shopify will be a more sensible choice. Medusa.js makes sense when you need a custom checkout, B2B/B2C sales, connections to an ERP or WMS, custom warehouses, specific price lists, and control over both your code and data.
Frequently asked questions about Medusa.js
Have more questions?
If you didn't find the answer you were looking for, feel free to drop us a line at [email protected].
[email protected]First, products, variants, prices, customers, and orders are mapped. Then a migration script transfers the data into Medusa's PostgreSQL database. The old store is switched off only when the new platform is functional, tested, and ready for live operation.
Yes. Medusa is a solid foundation for B2B sales because it allows you to work with custom price lists, customer groups, order limits, and approval processes. We handle invoicing, due dates, or ERP integrations through a custom integration layer.
Any payment gateway with a usable API can be integrated. Typical options include Stripe, Adyen, TrustPay, Checkout.com, Apple Pay, and Google Pay depending on the country, currency, and project requirements.
Medusa.js is open-source, so you don't pay a license for the core itself. Costs consist of hosting, database, monitoring, backups, development, and ongoing maintenance. For small to medium-sized online stores, operation is often cheaper than with enterprise SaaS platforms. However, the exact estimate depends on traffic, number of products, integrations, and availability requirements.