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BigCommerce → Shopify Plus Replatform

BigCommerce to Shopify Plus Migration

Q: How do BigCommerce custom fields map to Shopify metafields and metaobjects?

BC custom fields → Shopify metafields (1:1 for simple types). Product Modifiers that drive price / SKU adjustments → Shopify variants when each combination is a real SKU, or Shopify Functions for runtime price overlays. Relational data (size guides, fitment tables, ingredient lists, store locator entries) → Shopify metaobjects, which give you a single canonical record referenced from multiple products. We document every field at discovery.

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.

Get a Migration Proposal Call 888-982-8269

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Reviewed by the 1Digital^® Migration TeamLast updated: May 15, 2026

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.

Why Replatform

Specific BigCommerce Pain → Shopify Plus Gain

Shop Pay conversion uplift

Shop Pay's one-tap accelerator + network-effect login (millions of buyers already enrolled) typically improves checkout completion versus a stock BigCommerce Open Checkout deployment — a lift we instrument rather than assert by baselining your current funnel before cutover and reporting the measured post-launch delta. For DTC brands with a high share of return mobile shoppers, Shop Pay alone often justifies the move.

Checkout Extensibility vs Open Checkout

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.

Marketplace depth

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.

Shopify Functions for custom logic

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.

B2B on Shopify (native, GA 2023+)

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 + Oxygen edge

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.

15yr

BigCommerce & Shopify Plus experience

200+

Migrations completed

Failed cutovers

30d+

Post-launch monitoring

What We Migrate

The Records Your Migration Has To Carry

Field-level mapping with referential integrity — every record that drives revenue moves with you.

Catalog & custom fields

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.

Customers & B2B Companies

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.

Order history

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.

Pricing & B2B

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).

Inventory & locations

BigCommerce Multi-Location Inventory locations → Shopify Locations with stock levels, reservation rules, and store-pickup config preserved.

Content (Pages / blog)

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.

URLs & SEO equity

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.

Reviews & UGC

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

Six-Phase Migration Framework

Discovery & feature audit

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.

Data audit & URL inventory

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.

URL & schema mapping

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.

Staged build & data load

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.

Cutover & DNS

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.

Post-launch QA & monitoring

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

BigCommerce App → Shopify Plus Equivalent

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

Keep the Rankings, Citations, and Traffic You've Earned

Migrations that lose SEO equity lose months of revenue. Our checklist treats search and AI-engine continuity as a release-blocker.

Full BigCommerce URL export covering products, categories (with BC's flexible nesting), pages, blog posts, and any branded short URLs.
Page-level 301 redirect map — BC /<category>/<product>/ → Shopify /products/<handle>, BC /<category>/ → /collections/<handle>, with pages and blog mapped per type and Shopify's mandatory prefixes respected.
Title, meta description, canonical, hreflang, and Open Graph tag carryover on a per-URL basis. Markets hreflang handled at the Shopify Markets layer.
Schema graph rebuild with consistent @id references (Organization, Product, BreadcrumbList, FAQPage, AggregateRating) so ChatGPT, Perplexity, Gemini, and AI Overviews keep citing the brand.
XML sitemap regeneration + llms.txt preservation + robots.txt parity. AI crawler access (GPTBot, PerplexityBot, ClaudeBot, Google-Extended) preserved through Shopify's robots.txt template.
Core Web Vitals targets baked into the Online Store 2.0 theme or Hydrogen build — LCP under 2.5s, INP under 200ms, CLS under 0.1. Oxygen's edge network typically improves LCP versus BigCommerce CDN-served delivery on Hydrogen builds, measured against the pre-cutover baseline rather than asserted.
30+ days of post-launch monitoring: crawl errors, Search Console coverage, ranking deltas, AI-engine citation share, conversion-rate parity check (with Shop Pay uplift baseline).

Timeline & Engagement

Typical Engagement Bands

8–10 weeks

Standard B2C

Catalog under 5K SKUs, Online Store 2.0 theme, Shop Pay enabled, common app stack (Klaviyo, Yotpo, ShipStation, Recharge), 2 payment gateways.

12–14 weeks

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.

16–22+ weeks

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

Tell us about your BigCommerce store

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.

Get a Migration Proposal

FAQ

BigCommerce → Shopify Plus FAQs

How long does a BigCommerce to Shopify Plus migration take?

Typical BigCommerce to Shopify Plus projects run 8–14 weeks. Standard B2C with mid-size catalog and an Online Store 2.0 theme: 8–10 weeks. Mid-complexity B2B (BigCommerce B2B Edition → B2B on Shopify with Companies and Catalogs), ERP / NetSuite, Avalara, and custom Functions logic: 12–14 weeks. Hydrogen + Oxygen (replacing a BigCommerce Catalyst headless storefront) with Multi-Storefront → Markets rollout: 16–22+ weeks. Scope is set after a discovery audit.

Will Shop Pay actually lift our conversion rate vs BigCommerce Open Checkout?

In our experience, materially — Shop Pay's network-effect login auto-fills shipping, billing, and payment from any other Shopify store the buyer has used, which typically improves checkout completion for DTC merchants with a meaningful share of returning mobile shoppers. The effect is generally smaller for B2B-heavy or first-time-buyer-skewed catalogs. We baseline your current checkout funnel before migration and report the measured delta post-launch so the Shop Pay assumption is verified rather than quoted as a range.

How do BigCommerce custom fields map to Shopify metafields and metaobjects?

BC custom fields → Shopify metafields (1:1 for simple types: text, number, date, JSON). Product Modifiers that drive price / SKU adjustments → Shopify variants when each combination is a real SKU, or Shopify Functions for runtime price overlays. Relational data (size guides, fitment tables, ingredient lists, store locator entries) → Shopify metaobjects, which give you a single canonical record referenced from multiple products. We document every field at discovery and propose the cleanest Shopify shape before quote.

What changes when we go from BigCommerce Stencil to Shopify Liquid?

Stencil's Handlebars helpers translate to Liquid filters (similar mental model — both are template engines). BC's {{snippet}} partials → Liquid sections and blocks (Online Store 2.0's section-based theme architecture). Stencil's front-matter config → Liquid section schemas. JavaScript bundlers (Stencil CLI / Webpack) → Shopify's theme app extensions or the OS 2.0 asset pipeline. For Hydrogen builds, the entire theme layer rebuilds in React + Remix — usually a planned modernization opportunity, not a pure port.

What about Open Checkout customizations — how do we get those onto Shopify?

Most BC Open Checkout customizations rebuild as Shopify Checkout UI Extensions (banners, custom fields, gift options, address validations, post-purchase upsells) + Shopify Functions (discounts, shipping, payment customizations, cart transforms). The advantage: Shopify owns PCI scope and security patching, so your team stops maintaining a forked checkout codebase. We map every BC checkout customization to the appropriate Shopify extension surface at discovery.

How does BigCommerce B2B Edition move to B2B on Shopify?

B2B Edition Companies, Buyer Roles, and Price Lists → B2B on Shopify Companies, Locations, Buyer Roles, and Catalogs (with quantity rules + percentage / fixed price-list overrides). Quoting → Shopify draft-order quoting or a B2B app (BSS B2B, Sparklayer) when the workflow needs richer approval chains. Net terms and credit-limit enforcement land natively on Shopify B2B. Shopping Lists → Shopify saved carts or the B2B app's equivalent. PunchOut via PunchOut2Go on both platforms.

Will there be downtime at cutover?

Planned cutovers are minutes, not hours. We run a parallel Shopify Plus environment, freeze BigCommerce writes, sync the final delta (orders / customers / inventory) via BC APIs → Shopify Admin GraphQL, flip DNS with low TTL, and validate checkout / Shop Pay / Functions / Markets / GA4 / pixels live. The new store is QA'd against a runbook before the cutover window opens — rollback paths and DNS TTL are documented.

Replatform from BigCommerce to Shopify Plus — without losing what you've built.

Free migration audit. Fixed-fee proposal. Documented runbook. 200+ migrations run on a documented no-data-loss cutover playbook.

Get a Migration Proposal Call 888-982-8269