Magento to MedusaJS: You're Not Migrating, You're Rebuilding
Every other migration in this series moves you between platforms that do broadly the same job in broadly the same way. This one doesn't, and pretending otherwise is how these projects go wrong.
Medusa is a modular, API-first commerce framework in Node and TypeScript. It gives you well-designed commerce primitives — cart, order, pricing, customer, inventory, and a workflow engine to compose them — plus an admin application. What it does not give you is a storefront, a theme system, a marketplace of thousands of extensions, or a set of merchandising screens that a non-technical team can operate on day one.
Magento hands you a store you then customize. Medusa hands you commerce building blocks you then assemble. That's not a criticism of either; it's the entire decision.
Be honest about what you're taking on
The thing that gets undersold is how much of Magento you're using without noticing. Out of the box you have layered navigation, catalog price rules, cart price rules with conditions, customer groups, tax rules by zone, multi-source inventory, CMS pages and blocks, product reviews, wishlists, a full admin with granular ACL, an import/export system, and a report suite.
On Medusa, some of that exists as modules, some exists as community packages, and some is yours to build. Before committing, take your Magento admin, walk every screen your team touches in a normal month, and mark each one: exists, plugin available, or we build it. That list is your actual project scope, and it's usually longer than the initial estimate assumed.
Do the same for extensions. A store running twenty commercial extensions is running twenty pieces of functionality with no equivalent waiting for you.
What you get in return
This isn't a one-sided trade, and the upside is real:
Genuine architectural control. Medusa's modules can be replaced or extended without forking core. If your business logic doesn't fit the standard commerce model — subscriptions, complex fulfillment, marketplace mechanics, unusual pricing — building it as a module is dramatically cleaner than fighting Magento's plugin system and dependency injection to bend behavior it wasn't designed for.
Performance as a default, not a project. Medusa's own published benchmarks claim its API is around six times faster than Magento's — treat vendor benchmarks with appropriate skepticism, but the structural point stands. A stateless Node service in front of Postgres, with the storefront deployed separately, avoids most of what makes Magento performance work a specialty in the first place.
Independent scaling and deployment. Storefront and backend deploy separately, scale separately, and fail separately. For teams already doing modern frontend work, this matches how they want to build.
Hiring pool. TypeScript and React developers are easier to find than experienced Magento developers, and considerably easier than good ones.
The team question decides this
The most common failure mode has nothing to do with the platforms.
A Magento store is typically maintained by a PHP team, an agency, or both. Medusa needs TypeScript and Node capability, frontend engineering for the storefront, and the ongoing ownership of code that a vendor previously shipped you. If your plan is "our Magento agency will learn Node," get very specific about who is actually writing the storefront and who supports it at 2am in year two.
Ask directly:
- Who owns the storefront codebase in eighteen months?
- What happens when the one person who understands the cart customization leaves?
- Who does the merchandising team ask when they need a new promotion type — and is that a config change or a sprint?
That last one catches people. On Magento, a lot of merchandising is admin configuration. On a custom build, some of it becomes engineering work, and marketing teams feel that change immediately.
The data migration is the easy part
Genuinely — and it's the part people worry about most.
Medusa documents a plugin-based approach for importing Magento data, and the shape is straightforward: read from Magento's REST API or database, write through Medusa's module services.
# Pull catalog from Magento's REST API
curl -H "Authorization: Bearer $MAGENTO_TOKEN" \
'https://your-store.example/rest/V1/products?searchCriteria[pageSize]=100&searchCriteria[currentPage]=1'
The mapping decisions that matter:
| Magento | Medusa | Watch for |
|---|---|---|
| Configurable + simple children | Product with variants | Simples sold standalone need a decision |
| EAV attributes | Product options and metadata | Not everything deserves to survive the trip |
| Customer groups | Customer groups and price lists | Group-based pricing rules must be modeled explicitly |
| Catalog and cart price rules | Promotion module rules | The most likely thing to need custom work |
| Store views | Regions, sales channels, currencies | Multi-store maps differently than you expect |
| CMS pages and blocks | Your CMS of choice | Not Medusa's job — pick a CMS deliberately |
Run the import repeatedly from early on, diff the runs, and count everything: products, variants, customers, orders, media. "It looks right" is not a migration check.
Passwords won't transfer — different hashing. Plan a reset flow, and write the email properly.
When it's the right call
Go if you have in-house TypeScript capability and want to keep it; your commerce logic is genuinely unusual and you're fighting the platform to express it; you're rebuilding the frontend anyway; or you want architectural ownership and have the team to sustain it.
Stay if your team is PHP and will remain PHP; you depend on a stack of commercial extensions; your merchandising team relies on admin configuration rather than developers; or the actual problem is that your Magento store is unpatched and slow — both of which are fixable in place, at a fraction of the cost.
And be skeptical of replatforming to escape technical debt. Debt is a maintenance practice, not a platform property. A greenfield build feels clean for about a year.
If you've gone this direction and it isn't working, the way back is a real option and worth understanding before you need it.
Emyrix builds on both Magento and MedusaJS, which means we'll tell you when a rebuild isn't the answer. If you want the feature-by-feature scope done properly before committing, get in touch.
Medusa's module APIs and migration tooling evolve quickly — check the current documentation before building against any specific interface.
