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BigCommerce → Shopify Plus Replatform
Replatform from BigCommerce to Shopify Plus — capture the Shop Pay conversion uplift, move from Open Checkout to Checkout Extensibility (and let Shopify own PCI scope), and re-map BC custom fields to Shopify metafields and metaobjects. Stencil → Liquid, Catalyst → Hydrogen, B2B Edition → B2B on Shopify. 200+ migrations completed.
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Reviewed by the 1Digital® Migration TeamLast updated:
TL;DR
1Digital® migrates merchants off BigCommerce onto Shopify Plus — Online Store 2.0, Hydrogen + Oxygen, and B2B on Shopify. Custom fields → metafields + metaobjects, Product Modifiers → variants + Functions, Open Checkout customizations → Checkout UI Extensions + Functions, B2B Edition → B2B on Shopify Companies + Catalogs, Multi-Storefront → Markets. SEO equity preserved with page-level 301s, schema graph rebuild, llms.txt continuity.
Related: All platform migrations · Shopify → BigCommerce · Shopify Plus Agency · Shopify Plus Developer · BigCommerce Experts · Data Migration
Why Replatform
Shop Pay's one-tap accelerator + network-effect login (millions of buyers already enrolled) lifts checkout completion 10–30% vs a stock BigCommerce Open Checkout deployment. For DTC brands with a high share of return mobile shoppers, Shop Pay alone often justifies the move.
BigCommerce Open Checkout gives you total source control — but it's your responsibility to maintain, patch, and PCI-revalidate the fork on every upstream change. Shopify's Checkout Extensibility (UI Extensions + Functions) lets you customize the same surfaces while Shopify owns PCI scope and security.
Shopify's app marketplace has ~4x the listing count of BigCommerce's. For loyalty (Smile, Yotpo, LoyaltyLion), reviews (Judge.me, Loox, Okendo), subscriptions (Recharge, Bold, Awtomic), and post-purchase (Rebuy, AfterShip), Shopify has more competition and more depth of integration at each price tier.
Custom discount, shipping, payment, cart, and delivery logic that runs on Shopify's infrastructure with millisecond latency — replaces BigCommerce Scripts API limitations and lets you keep complex pricing or promotion logic without owning the Open Checkout fork.
Companies, Locations, Buyer Roles, catalog assignments, quantity rules, percentage / fixed price lists, draft-order quoting, and Net terms — all native to Shopify Plus. Covers most of what BigCommerce B2B Edition does, with deeper marketplace overlap and tighter checkout extension support.
Hydrogen (React + Remix) on Oxygen is Shopify's first-party headless storefront framework — edge-hosted, integrated with Functions and Customer Account API. BigCommerce Catalyst is conceptually similar (Next.js + GraphQL Storefront API), but Hydrogen + Oxygen has Shopify-native auth flow and edge deployment baked in.
What We Migrate
Field-level mapping with referential integrity — every record that drives revenue moves with you.
Products, variants, options, custom fields, Product Modifiers → Shopify products + variants + metafields + metaobjects. BC Product Modifiers (price / sku adjustments) typically rebuild as Shopify variants or Functions logic.
Customer profiles, addresses, Customer Groups → Shopify customers + segments + B2B Companies. BigCommerce B2B Edition Company Accounts with Buyer Roles → Shopify B2B Companies with Locations + Buyer roles preserved.
Complete orders, fulfillments, refunds, gift cards, store credit → Shopify orders with native store-credit support. Order metadata + custom field continuity for revenue reporting, LTV, and support.
Price Lists (B2B Edition) → Shopify B2B catalogs with quantity rules and percentage / fixed price-list overrides. Quoting (B2B Edition) → Shopify draft-order quoting or a B2B app (BSS B2B, Sparklayer).
BigCommerce Multi-Location Inventory locations → Shopify Locations with stock levels, reservation rules, and store-pickup config preserved.
BigCommerce Pages, Page Builder content, and blog → Shopify Pages + Online Store 2.0 sections + metaobjects + Shopify Blog. URL slugs preserved or 301'd to Shopify's mandatory /pages/, /blogs/ prefixes.
Full BigCommerce URL inventory (including BC's flexible category nesting and product URL variants) → page-level 301 map to Shopify's /products/, /collections/, /pages/, /blogs/ structure. Title, meta, canonical, hreflang carryover.
Yotpo, Trustpilot, Bazaarvoice, Stamped → same vendors on Shopify Plus. Star ratings, photo / video reviews, verified-buyer flags, and AggregateRating schema continuity for AI-engine citations.
How We Migrate
Map every BigCommerce app, Open Checkout customization, Scripts API rule, B2B Edition workflow, Multi-Storefront channel, and integration (ERP / OMS / PIM) to a Shopify Plus equivalent (native, app, Function, Checkout UI Extension, Hydrogen component). Outcome: feature parity matrix, Functions specification, risk register.
Catalog count, custom field density, Product Modifier complexity, customer + order volume, MSI locations, BigCommerce category nesting depth, sitemap parse. Outcome: data parity targets, page-level URL-mapping spreadsheet respecting Shopify's mandatory prefixes, 301 plan.
BigCommerce product / category / page URLs → Shopify's /products/, /collections/, /pages/, /blogs/ structure with 301 rules, canonical strategy, schema graph rebuild (Product, BreadcrumbList, FAQPage, Organization) with consistent @id references, hreflang re-anchored to Shopify Markets.
Online Store 2.0 theme or Hydrogen storefront build (Stencil → Liquid migration patterns: Handlebars helpers → Liquid filters, BC's {{snippet}} → Liquid sections / blocks). Iterative data loads with field-level parity reports — catalog, custom fields → metafields, customers, B2B companies, orders, reviews. Apps, Functions, and Checkout UI Extensions installed against staging.
Freeze BigCommerce writes (webhook off, cart actions disabled). Sync final delta (orders, customers, inventory) via Catalog / Customers / Orders APIs → Shopify Admin GraphQL pipeline. DNS flip with low TTL. Validate checkout / Shop Pay / Functions / Markets / GA4 / Consent Mode v2 / pixels live. Cutover under 60 minutes.
30+ days of crawl-error triage, Search Console change-of-address, ranking and AI-citation monitoring, Core Web Vitals (LCP / INP / CLS), conversion-rate watch (Shop Pay uplift validation), B2B workflow QA, and a fix-list sprint for edge cases that only surface under live traffic.
App Mapping
The third-party stack you depend on rarely needs to change — only the connectors and the host platform.
| BigCommerce | Shopify Plus Equivalent |
|---|---|
| BigCommerce Open Checkout (forked React) | Shopify Checkout Extensibility (Checkout UI Extensions + Functions) — Shopify owns PCI scope |
| BigCommerce native payment gateways | Shopify Payments + Shop Pay + Apple Pay + Google Pay + PayPal + Affirm + Klarna |
| BigCommerce Scripts API | Shopify Functions (Rust / JavaScript / TypeScript discount / shipping / payment / cart logic) |
| B2B Edition (Companies, Quoting, Shopping Lists) | B2B on Shopify (Companies, Locations, Buyer Roles, Catalogs, Net Terms — native) |
| BigCommerce Multi-Storefront | Shopify Markets (multi-currency, multi-region, multi-language) + Plus expansion stores when needed |
| Klaviyo for BigCommerce | Klaviyo for Shopify (native, deepest integration of any platform) |
| Yotpo / Bazaarvoice / Trustpilot / Stamped | Same vendors with native Shopify connectors (Judge.me + Loox + Okendo also available) |
| Avalara / BigCommerce Tax (TaxJar) | Shopify Tax (built-in) or Avalara AvaTax for Shopify |
| ShipperHQ / ShipStation for BigCommerce | Shopify Shipping (native US carrier rates), ShipperHQ, ShipStation |
| Recharge / Rebillia for BigCommerce | Shopify Subscriptions, Recharge, Bold, Awtomic |
| BigCommerce Catalyst (Next.js) | Hydrogen (React + Remix) on Oxygen edge hosting, or Online Store 2.0 themes |
| Gorgias / Zendesk for BigCommerce | Same vendors with native Shopify connectors |
SEO Equity Protection
Migrations that lose SEO equity lose months of revenue. Our checklist treats search and AI-engine continuity as a release-blocker.
Timeline & Engagement
Standard B2C
Catalog under 5K SKUs, Online Store 2.0 theme, Shop Pay enabled, common app stack (Klaviyo, Yotpo, ShipStation, Recharge), 2 payment gateways.
B2B / Mid-complexity
B2B on Shopify (Companies, Catalogs, Net Terms), Price Lists → Shopify catalogs, ERP / NetSuite, Shopify Tax / Avalara, Functions rebuilding Scripts logic, Checkout UI Extensions replacing Open Checkout customizations.
Hydrogen / Headless / Enterprise
Hydrogen + Oxygen (replacing Catalyst), multi-currency Markets rollout (replacing Multi-Storefront), complex Functions / Checkout UI Extensions, large catalog (50K+ SKUs), B2B + ERP-linked pricing.
Engagements start at $185/hour. Fixed-fee proposal after discovery — typically $25K (simple) to $150K+ (enterprise Hydrogen with B2B + ERP).
Request a Proposal
Share your BigCommerce plan (Pro / Enterprise / Multi-Storefront), catalog scale, B2B Edition usage, Open Checkout / Scripts customizations, ERP / OMS, and what made you start looking at Shopify Plus. A senior strategist responds within one business day with a pricing band and a draft migration roadmap.
FAQ
Free migration audit. Fixed-fee proposal. Documented runbook. Zero failed cutovers in 200+ migrations.