Medusa.js: The Open-Source Shopify Alternative Worth Considering

Shopify dominates online retail for good reason. It’s reliable, it’s well-supported, and it handles the complex bits like payments and tax calculations without much fuss. But it comes with costs that add up — monthly subscriptions, transaction fees, app charges, and the limitations of building within someone else’s platform.

Medusa.js offers a different path. It’s an open-source e-commerce engine that gives you Shopify-level functionality without the monthly platform fee. I’ve been exploring it for client projects and I think it deserves serious attention from anyone who’s feeling constrained by their current e-commerce platform.

What Is Medusa.js?

Medusa.js is a Node.js-based, open-source commerce platform. Think of it as the engine behind an online store — it handles products, orders, customers, payments, shipping, and all the backend logic you need — but it doesn’t dictate what your storefront looks like or how it behaves.

It’s headless by default, meaning you build your own frontend and connect it to Medusa’s API. This is similar to what I do with Shopify headless builds, but without the Shopify subscription fee.

Medusa provides an admin dashboard for managing your store, a REST and JavaScript SDK for building your frontend, and a plugin system for extending functionality.

How Medusa Compares to Shopify

Cost

This is where Medusa stands out immediately.

Shopify charges a minimum of around twenty-five pounds per month for their Basic plan, plus transaction fees if you don’t use Shopify Payments. Most businesses end up on the seventy-nine pound plan or higher once they need features like professional reports or additional staff accounts. Add app subscriptions, and many Shopify stores are paying one hundred fifty to three hundred pounds per month just in platform and app fees.

Medusa is free to download and run. Your costs are limited to hosting (which can be as low as five to ten pounds per month on a VPS) and any payment processing fees from your chosen provider. There’s no transaction fee from Medusa itself.

Over a year, a typical Shopify store might spend two thousand pounds or more on platform fees and apps. A Medusa store could run for under two hundred pounds in hosting costs.

Flexibility and Customisation

Shopify gives you themes and a Liquid templating language. Even with a headless approach, you’re still working within Shopify’s data model and API limitations. Want to add a custom field to a product that doesn’t fit Shopify’s metafield structure? You’re working around constraints.

Medusa gives you the source code. You can modify the data model, add custom entities, change business logic, and build any feature you need. Want a unique pricing model? A custom loyalty system? A subscription service? You build it directly into the platform rather than bolting on apps.

Checkout

Shopify has arguably the best checkout on the internet. Shopify Checkout is optimised, trusted, and supports Shop Pay, Apple Pay, Google Pay, and dozens of other payment methods. Conversion rates are excellent.

Medusa requires you to build or configure your own checkout. You can integrate Stripe, PayPal, and other providers through Medusa’s payment plugin system. It works well, but you don’t get the brand recognition of “Powered by Shopify” that some customers find reassuring.

This is an important consideration. Shopify’s checkout is a genuine competitive advantage that’s difficult to replicate.

Infrastructure Management

Shopify is fully managed. You don’t think about servers, databases, scaling, security patches, or uptime. It just works.

Medusa needs hosting. You’re responsible for the server, the database, backups, security, and keeping everything updated. This isn’t difficult with modern hosting providers, but it’s not zero effort either.

When Medusa Makes Sense

You’re Paying Too Much in Platform Fees

If your Shopify bill is eating into margins — especially if you’re on an Advanced or Plus plan — Medusa’s zero platform fee is compelling. For businesses doing decent volume, the savings can be significant.

You Need Deep Customisation

Some businesses have unique requirements that Shopify’s app ecosystem can’t handle cleanly. Custom pricing rules, complex product configurations, multi-vendor marketplaces, or B2B ordering workflows are all easier to implement when you control the entire codebase.

You Want to Own Your Infrastructure

There’s a philosophical and practical argument for owning your commerce infrastructure. With Shopify, you’re a tenant. If Shopify changes their pricing, their policies, or their API, you adapt or leave. With Medusa, you own every line of code and every piece of data.

You’re a Developer or Have Developer Resources

Medusa is a developer tool. It’s designed to be extended and customised through code. If you or your team are comfortable with Node.js and TypeScript, Medusa is a joy to work with. If you’re not technical, it’s not the right choice.

When Shopify Is Still the Better Choice

You Want Zero Infrastructure Hassle

If managing servers, databases, and deployments sounds like a headache, Shopify handles all of that. For many business owners, the monthly fee is worth not thinking about infrastructure.

You Need to Launch Quickly

A Shopify store can be live and selling within a day. A Medusa store requires development time to build the storefront, configure payment providers, set up hosting, and test everything. If speed to market is your priority, Shopify wins.

You Rely on the App Ecosystem

Shopify has thousands of apps for everything from email marketing to accounting integrations. While Medusa has plugins, the ecosystem is much smaller. If your business depends on specific Shopify apps, switching would mean finding or building alternatives.

Your Team Is Non-Technical

Shopify’s admin is designed for anyone to use. Medusa’s admin is good, but customising the platform or troubleshooting issues requires development skills. If there’s no developer on your team or available to you, Shopify is safer.

Setting Up Medusa: What’s Involved

For those considering the switch, here’s an honest overview of what’s involved.

The Backend

Medusa’s backend installs via npm and runs as a Node.js server with a PostgreSQL database. Initial setup is straightforward if you’re familiar with Node.js. You configure your payment providers (Stripe and PayPal are well-supported), set up your product catalogue, and configure shipping options.

The Admin Dashboard

Medusa includes an admin dashboard for managing products, orders, customers, and settings. It’s clean and functional — not as polished as Shopify’s admin, but it covers all the essentials.

The Storefront

This is where the development work lives. You need to build a frontend that communicates with Medusa’s API. Medusa provides starter templates for Next.js, but you can use any framework. I’d use SvelteKit or Astro, depending on the project requirements.

Building a complete storefront — product listings, product pages, cart, checkout, customer accounts, order tracking — takes meaningful development time. This isn’t a weekend project; it’s a proper build.

Hosting

You’ll need somewhere to run the Node.js backend and PostgreSQL database. A small VPS from a provider like Hetzner can handle this for under ten pounds per month. The frontend can be deployed to any static host or edge platform.

A Hybrid Approach

Something I’ve been exploring is a hybrid approach — using Medusa for specific use cases while keeping Shopify for others.

For example, a client might use Shopify for their main consumer store (benefiting from Shopify’s checkout and brand trust) while using Medusa for a B2B wholesale portal where custom pricing, bulk ordering, and account-specific catalogues are needed. The two systems can share inventory data and order management through careful integration.

This gives you the best of both worlds: Shopify’s proven consumer experience alongside Medusa’s customisation for specialised requirements.

The Future of Medusa

Medusa has been growing steadily. Medusa 2.0 brought significant improvements to the architecture, including a more modular design and better developer tools. The project is backed by venture funding and has an active community.

The open-source e-commerce space is maturing, and Medusa is leading that charge. Even if you’re happy with Shopify today, it’s worth keeping Medusa on your radar as a viable alternative.

Should You Switch?

The honest answer is: probably not, if Shopify is working for you. Migration has costs — development time, potential downtime, learning curves, and the risk of breaking what already works.

But if you’re starting a new project, evaluating your platform costs, or need capabilities that Shopify can’t provide, Medusa deserves a serious look. The savings and flexibility can be transformative for the right business.

If you’re curious about whether Medusa could work for your e-commerce needs, let’s talk. I can help you evaluate the costs, assess the technical requirements, and figure out whether the switch would genuinely benefit your business.