REPLATFORMING GUIDE
BigCommerce to Shopify Plus.
A practical guide for mid-market merchants planning a replatforming.
Mid-market manufacturers, distributors, and retailers are leaving BigCommerce for Shopify Plus at a steady pace. The reasons are practical: total cost of ownership, B2B feature gaps, and a thinning partner ecosystem. This guide breaks down what's driving the shift, what to plan for, and how to run a migration without losing operational continuity — written by a team that worked both platforms from the inside.
WHY THE SHIFT IS HAPPENING
Why the shift is happening.
This isn't anti-BigCommerce content. BigCommerce remains a capable platform for many use cases. But for mid-market merchants — especially those with B2B operations, complex catalogs, or growing ERP integration needs — the trade-offs have shifted in Shopify Plus's favor over the past two years.
Total cost of ownership
BigCommerce's tiered pricing, sales-volume thresholds, and required app stack to fill feature gaps add up. Shopify Plus's flat pricing and broader native feature set typically lowers TCO over a 3-year horizon — particularly for B2B merchants who can replace 4–8 paid apps with native Shopify B2B features.
B2B feature depth
Shopify's native B2B — Company Accounts, Catalogs, Price Lists, Customer Accounts, B2B Checkout — has matured rapidly. BigCommerce B2B Edition relies more heavily on third-party apps and customization to deliver equivalent capability, which compounds TCO and operational complexity.
Partner ecosystem
Shopify's partner ecosystem has grown faster than BigCommerce's, particularly in North America and Europe. For merchants who need agency support, app integrations, or specialized B2B implementation expertise, the pool of capable partners is deeper on Shopify Plus.
Platform velocity
Shopify ships major B2B and platform improvements quarterly. The pace of native feature development — and the rate at which B2B capabilities expand beyond Plus — is something merchants are factoring into long-term platform decisions.
None of this means every BigCommerce merchant should migrate. But if you're already weighing it, these are the dynamics behind the trend.
CREDIBILITY
We've built on both platforms.
Human After All was a BigCommerce B2B Specialized Agency before transitioning to Shopify Plus Partner status. We implemented Atelier du Chef — a Quebec commercial kitchen equipment distributor — on BigCommerce with deep SAP ERP integration. Thousands of SKUs, customer-specific pricing, real-time inventory sync, bilingual operation. The store is live and running today.
That experience matters because most agencies pitching BigCommerce-to-Shopify migrations have only ever worked one side. We know where BigCommerce's B2B Edition is genuinely strong and where it falls short for mid-market scale.
Atelier du Chef
Quebec commercial kitchen equipment distributor. Implemented on BigCommerce with deep SAP ERP integration. Thousands of SKUs, customer-specific pricing, real-time inventory sync, bilingual EN/FR operation.
Read case study → SHOPIFY PLUS · B2BHusky Boutique
Four distinct buyer experiences on Shopify Plus — consumers, schools, enterprises, corporate programs — replacing a one-size-fits-all custom build. $855K B2B revenue at year one.
Read case study →MIGRATION READINESS
Before you migrate, assess these eight areas.
A clean migration starts with an honest readiness assessment. These are the eight areas we audit before scoping any BigCommerce-to-Shopify migration.
B2B operations and account hierarchy
How are companies, locations, and buyers structured today? Shopify's Company Accounts model is hierarchical and opinionated; BigCommerce B2B Edition's company structure maps cleanly in some patterns and requires rework in others.
Catalog and pricing complexity
Do you have customer-specific pricing? Volume tiers? Catalogs gated by company? Inventory shared across locations? Shopify's native Catalogs and Price Lists handle most patterns, but the migration of pricing logic from BigCommerce often surfaces edge cases worth scoping early.
ERP integration architecture
How does your storefront talk to your ERP today? A clean migration preserves data flows; a sloppy one breaks them. Plan the ERP integration as a migration workstream, not an afterthought.
App stack rationalization
Which BigCommerce apps replace cleanly with Shopify native features, which need direct equivalents on the Shopify App Store, and which require custom development? Most migrations remove 30–50% of the existing app stack.
SEO equity and URL structure
Product URLs, category URLs, content URLs — all need a 301 redirect map. Plan the redirect strategy before migration, not after launch.
Customer and order data migration
Customer accounts, order history, B2B account assignments, custom pricing agreements. Each data domain has its own migration pattern and validation approach.
Theme and storefront experience
Migrating themes is rarely viable. Plan a Shopify theme rebuild — either from a paid Shopify theme baseline or a custom build — and use the migration as an opportunity to address UX debt accumulated on BigCommerce.
Launch sequencing and go-live strategy
Big-bang launches rarely go well at mid-market scale. Plan a phased cutover: data migration, soft launch with selected accounts, full migration, BigCommerce decommission.
MIGRATION TIMELINE
Typical timeline.
A standard mid-market BigCommerce-to-Shopify Plus migration runs 12–20 weeks depending on B2B complexity, ERP integration scope, and data volume. Below is the typical phasing.
Discovery & readiness assessment
Audit, gap analysis, scope finalization, redirect strategy.
Build & integration
Theme build, B2B configuration, ERP integration, app stack rebuild.
Data migration & QA
Products, customers, orders, B2B accounts, pricing migration. End-to-end testing.
Soft launch
Controlled cutover to selected accounts. Monitor, iterate, validate.
Full launch & decommission
Full migration, BigCommerce wind-down, post-launch support.
B2B activation can run in parallel with the migration build, or as a follow-on engagement after launch. See B2B Launch for the dedicated B2B activation engagement.
COMMON PITFALLS
What goes wrong — and how to avoid it.
Underscoping the ERP integration
Teams budget for the platform migration but underestimate ERP integration as a separate workstream. Real-time pricing, inventory sync, and order flow into ERP is often where the budget overrun happens. Scope it as a peer to the platform migration, not a sub-task.
Skipping the redirect strategy
SEO equity loss is the most preventable migration risk. A complete URL audit, a 301 redirect map, and a post-launch SEO monitoring plan are mandatory. Skipping them is a measurable revenue risk.
Migrating the app stack 1:1
The BigCommerce app stack is rarely the right Shopify app stack. Map each BigCommerce app to one of three categories: replaced by native Shopify, replaced by Shopify equivalent, or requires custom development. Then rebuild — don't migrate.
Skipping the soft launch
Mid-market migrations with significant B2B operations should always run a soft launch phase before full cutover. A controlled rollout to 5–10 customers surfaces real-world issues that QA misses.
WHY US
Why work with Human After All on this migration.
We've built on both platforms
Atelier du Chef on BigCommerce. Husky Boutique on Shopify Plus. Live, running, B2B-grade implementations on both. The migration plan we deliver isn't a generalized template — it's grounded in actual platform fluency on the side you're leaving and the side you're moving to.
Operator-led, not just technical
Most BigCommerce-to-Shopify migrations are scoped by technical agencies. We bring 18+ years of operating B2B commerce for manufacturers and distributors — which means we plan migrations around the operational continuity of your business, not just the data fidelity of the move.
A clean path forward
When the migration completes and you're on Shopify Plus, you'll need to activate native B2B (B2B Launch) and potentially scale into more complex implementations (B2B Protocol). Same team, same methodology, no second-vendor handoff.
NEXT STEP
Planning a BigCommerce migration?
A discovery call is the right starting point. We'll review your current BigCommerce setup, map the migration risk profile, and align on scope, sequencing, and timing. No assessment fee. No pressure to commit.
FAQ