Shopify Migration & Replatforming, Without the Risk
Re-platforming is the highest-stakes project in commerce: get it wrong and you lose revenue, data, and rankings. SDG has moved some of the largest catalogs in retail onto Shopify and Shopify Plus without downtime or data loss, a Platinum Partner doing this since 2006.
Trusted by brands that define their categories
Migrations that don’t drop a beat
We plan migrations the way enterprise teams plan a system cutover: inventories, dependencies, rollback plans, and a sequence that keeps the storefront online and fast throughout. Our Barnes & Noble replatform moved millions of SKUs onto Shopify without missing a beat. That is the standard we bring to every move.
Catalog, data, and the systems behind them
A migration is more than a theme. We move products, customers, orders, and content, and we re-wire the back-office systems retail runs on, including ERP, OMS, PIM, and CRM, so nothing is lost and operations never stall. We migrate from Magento, Salesforce Commerce Cloud, BigCommerce, WooCommerce, and custom platforms.
Protect your SEO through cutover
Migrations are where organic traffic gets lost. We map redirects, preserve URL equity, and protect rankings through the switch, then keep optimizing. Explore our case studies or our Shopify Plus practice.
Everything your store needs, from one senior team
SDG is a full-service Shopify partner. The same senior engineers and designers behind enterprise replatforms also take on focused projects, ongoing support, and everything in between — for brands large and small. One accountable team, end to end.
Strategy & architecture
Roadmaps, technical architecture, and platform decisions grounded in nearly two decades on Shopify.
UX/UI design
Brand-led storefront design and interface work, engineered to convert as well as it looks.
Storefront development
Theme and fully custom front-end builds, from a single template to a complete storefront.
Headless & composable
Hydrogen, Oxygen, and custom React storefronts engineered to hit performance budgets others miss.
Replatforming & migrations
Moves onto Shopify and Shopify Plus without downtime or data loss, including the largest catalogs in retail.
Systems & data integration
ERP, OMS, PIM, CRM, and bespoke middleware — the back-office systems global retail runs on.
Performance engineering
Core Web Vitals, speed, and reliability treated as a baseline, not an afterthought.
Shopify SEO
Technical SEO, site architecture, and structured data so the right buyers find your store.
CRO & experimentation
Conversion-rate optimization and A/B testing that turn existing traffic into more revenue.
Support & retainers
Ongoing monthly support, maintenance, and enhancement — a senior team on call for your store.
Accessibility
WCAG-compliant builds and audits, so your storefront works for every customer.
Apps & custom functionality
Custom Shopify apps, checkout extensions, and bespoke features the platform doesn’t ship out of the box.
Frequently asked questions
What is Shopify replatforming?
Replatforming is moving an existing store onto Shopify or Shopify Plus from another platform, including catalog, customer and order data, content, design, and back-office integrations, ideally without downtime or lost SEO.
Which platforms do you migrate from?
Magento, Salesforce Commerce Cloud (Demandware), BigCommerce, WooCommerce, custom and legacy platforms, and Shopify-to-Shopify Plus upgrades.
Will my store go down during migration?
No. We sequence migrations to keep the storefront online and fast throughout cutover, with rollback plans at every step.
Will I lose my SEO rankings?
Not if it’s planned properly. We build redirect maps, preserve URL equity, and protect organic traffic through the switch, a step many teams get wrong.
How long does a Shopify migration take?
From a few weeks for a focused move to several months for a large enterprise catalog with deep integrations. We scope to the actual complexity.
Can you migrate a very large catalog?
Yes. We’ve migrated some of the largest catalogs in retail, including millions of SKUs, onto Shopify.