How do I plan a Shopify Plus migration?

Plan in phases. The work is sequence-sensitive — getting the order right is more important than the speed of any one step.

How do I preserve SEO during a replatform?

Audit current rankings, keep URL structures where possible, build a full 301 map (including paginated and faceted URLs), validate in staging, and submit a fresh sitemap on launch.

How do I move customers and orders safely?

Extract and transform in a staging environment, validate counts and sample records, then run a final delta sync immediately before DNS cutover so no orders are lost between freeze and launch.

How do I move recurring subscriptions?

Plan the subscription migration with your subscription app vendor early. Most require an export-import flow plus a billing schedule reconciliation on the Shopify Plus side.

How long does a Shopify Plus migration take?

Most enterprise migrations run 12–20 weeks end-to-end. Catalog depth, integration count, and the complexity of your subscription or B2B model are the biggest variables.

Can you migrate from any platform?

Yes — Magento 1, Magento 2 / Adobe Commerce, WooCommerce, BigCommerce, Salesforce Commerce Cloud, and custom legacy systems. The playbook is the same; only the extraction layer changes per source.

Do we lose customer or order history?

No. Customers, addresses, orders, subscriptions, and store credit are all transformed and loaded into Shopify Plus. Parallel testing confirms data parity before cutover.

What about our existing integrations?

Each integration is reviewed individually. Many are replaced by Shopify-native equivalents; the rest are rebuilt as Functions, webhooks, or a thin middleware layer.

Do you support post-launch?

Yes. Every migration ships with hypercare, and most clients move into an ongoing engineering retainer afterward.

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Service · Migration

Shopify Plus Migration Services

Move from Magento, WooCommerce, BigCommerce, or custom legacy systems to Shopify Plus — without losing orders, SEO, or sleep.

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Two legacy commerce platforms converging into a single Shopify Plus core

What it is

About this Shopify Plus service

A Shopify Plus migration is the controlled move of a live ecommerce business from a legacy platform — typically Magento, WooCommerce, BigCommerce, Salesforce Commerce Cloud, or a custom stack — to Shopify Plus. Done well, it lowers total cost of ownership, restores engineering velocity, and unlocks Plus features like Checkout Extensibility, B2B, Markets, and Shopify Functions.

Mejix has run enterprise migrations across 12+ countries, including 50,000-SKU catalogs with PIM, custom payment gateways, and ERP integrations in scope. We treat migrations as a sequence of de-risked phases rather than a single launch day. Customers, orders, addresses, subscriptions, and store credit move with full parity; SEO equity is protected with a complete 301 redirect map validated in staging.

If you already know your source platform, jump straight to the dedicated playbooks — they have the licensing, performance, and TCO detail specific to each migration path.

What's included

Concrete deliverables

Every engagement ships a defined scope. No vague promises — these are the artifacts and outcomes you can expect.

Data extraction & transformation

Products, variants, collections, customers, orders, subscriptions, store credit — extracted, validated, and loaded into Shopify Plus.

Theme & UX rebuild

A modern Shopify Plus theme aligned to your brand, or a clean port of your existing UX with conversion improvements along the way.

SEO preservation

URL audit, full 301 redirect map, structured data parity, and sitemap submission so organic traffic holds or grows post-launch.

Integration rebuild

ERP, PIM, OMS, payments, tax, and ESP integrations rebuilt as Shopify-native flows or maintained via custom middleware.

Parallel run & QA

Both stores live side by side for 1–3 weeks. Order flow, data parity, load tests, and redirect QA before any customer sees the new store.

International readiness

Multi-currency, Markets, tax, and localized content scoped during the migration rather than as an after-launch retrofit.

How it works

A predictable delivery process

The same sequence we run on every engagement, refined across enterprise Shopify Plus projects.

01

Discovery & audit

Map every data entity, integration, and custom feature. Decide what transfers, what gets rebuilt, what gets retired.
02

Architecture & data mapping

Design the Shopify Plus information architecture: collections, product types, metafields, integration contracts, and migration scripts.
03

Build, integrate & parallel run

Theme build, Checkout Extensibility, integrations, and Shopify Flow automations — verified against the live store under load.
04

Launch & hypercare

DNS cutover, final sync, monitoring dashboards, and on-call support tracking conversion, speed, and integration health.

Why Mejix

A certified Plus Tier partner

We don't sell what we haven't shipped. Every credential below is verifiable on the Shopify Partner Directory.

Plus Tier Shopify Partner

Verified Plus Tier credentials — the highest level in the Shopify Partner ecosystem.

Real enterprise migrations

50,000-SKU catalogs, PIM integrations, custom payment gateways — not landing pages.

Zero-downtime cutovers

Parallel-run methodology means customers see a working store before, during, and after the switch.

How To

How to: Shopify Plus Migration Services

Practical answers to the most common 'how do I…' questions teams ask before starting.

Frequently Asked Questions

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Related services & resources

Useful next stops — sibling services on this site and verified pages on mejix.com.