What is Medusa.js and why does Seeed use it?

Medusa.js is an open-source headless commerce engine with a module-based architecture. Seeed uses Medusa because clients own the code, there are no platform fees, and Seeed built the only published Medusa + Square integration.

How long does a headless commerce build take?

A standard Medusa + Payload + Next.js build runs 10–16 weeks depending on catalog size, custom logic, and migration complexity.

What does a headless commerce project cost?

Projects start at $75,000 for a standard implementation and scale with complexity.

Can Seeed migrate us from Shopify Plus to Medusa?

Yes. Seeed has a migration framework covering product data, customer records, order history, and SEO URL preservation.

Will our team be able to manage the site without engineers?

Yes. Payload CMS is designed for non-technical teams. Marketing pages, product enrichment, promotions, and media are all managed through Payload's admin UI without code changes.

Headless commerce on Medusa Payload and Next.js

Open-Source Headless Commerce on Medusa

Medusa.js v2 + Payload CMS + Next.js 15. Zero platform fees. Square-native payments. Client-owned stack — forever.

Get a Headless Commerce Quote Compare to Shopify Plus

THE STACK

Four Layers. Zero Vendor Lock-In.

Medusa.js v2 — Commerce engine. Multi-region, multi-currency, promotions, custom workflows. $0 licensing.

Payload CMS — Content layer. Marketing pages, media, structured data. No Contentful subscription.

Next.js 15 + Square — SSR storefront and ISR catalog. Square payments via the medusa-square-plugin.

When Headless Commerce Makes Sense

Speed Matters

Sub-1-second product page loads. Server-side rendering for Google. Edge-cached catalog pages. Shopify and WooCommerce themes can't match this.

Complex Business Logic

Multi-vendor marketplaces, event ticketing with seat maps, subscription billing, ERP-connected catalogs that change in real time.

Infrastructure Ownership

GDPR, PCI scope control, custom data residency, or an acquisition where the buyer needs full IP. You own the infrastructure.

Cost at Scale

You're spending more than $24,000/year on Shopify Plus or Commercetools and want to eliminate platform fees without rebuilding from scratch.

Migration Paths

Magento's total cost of ownership (hosting + licensing + developer time) typically exceeds $150,000/year for mid-market retailers. Seeed eliminates the licensing layer with Medusa migration tooling that preserves product data, customer records, order history, and SEO URLs.

From Magento 2

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Migration Paths

From Magento 2

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$2,000–$3,300/month in platform fees. No code ownership. Limited Square integration. Seeed migrates Shopify Plus stores to Medusa + Next.js with full data parity, redirect maps for SEO preservation, and bidirectional sync to Square.

From Shopify Plus

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BigCommerce caps API throughput, restricts checkout customization, and locks merchants into proprietary apps. Seeed lifts BigCommerce stores to Medusa with custom checkout flows, Square payment integration, and full data ownership.

From BigCommerce

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WooCommerce stops scaling around 50,000 SKUs and 10K daily orders. Seeed migrates WooCommerce stores to Medusa for the catalog and order infrastructure that scales — keeping WordPress for content if needed, or replacing with Payload CMS.

From WooCommerce

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New brand, new stack, no legacy. Seeed delivers production-ready Medusa + Payload + Next.js + Square in 10–16 weeks. The same architecture that powers Seeed's own SaaS products (Cashless, Just Reservations, WTZON).