127
replatforms completed
85+
brands moved to BigCommerce
BigCommerce Replatforming Agency
Replatform to BigCommerce
Without Losing Rankings
or Revenue
Your current platform is holding back what your store can do. Moving platforms is the highest-risk operation in ecommerce. We map every URL, test every integration, and rehearse your cutover before a single DNS record changes.
45
Day avg. cutover
0%
Search engine optimization regressions
100
Integrations transferred
Submit brief → call within 48 hours → scoped estimate in 3 days → Migration kickoff within 1 week of sign-off
Your team's time investment across a full migration is typically 4 to 6 hours per week across the project: one sprint review, async feedback on staging builds, and final user acceptance testing sign-off. We handle architecture mapping, build, quality assurance, and cutover.
Moving from a specific platform? We have a dedicated migration path:
The replatforming problem
Most migrations fail before launch day
Search engine optimization rankings drop because redirect maps are incomplete. Integrations break because they were never tested on staging. Revenue stalls because the cutover window stretched from hours into days.
The old way
Manual product exports that break halfway
Data validation runs after go-live, not before. Customers find broken records first.
URL structure wiped out on launch day
Organic rankings drop 30 to 50% because 301 maps were incomplete or untested.
Integrations reconnected weeks after launch
ERP, 3PL, and PIM reconnections are treated as post-launch tasks. Inventory gaps follow.
4 to 8 hours of downtime on go-live weekend
A hard cutover with no rollback plan means every minute of downtime costs real revenue.
No fixed go-live date from day one
Scope creep extends a 60-day project to 6 months with no accountability milestone.
The Redefine way
Automated migration with integrity reports before data moves
Every record counted, compared, and verified on staging. Zero deltas allowed through to cutover.
Full URL mapping and 301 redirects deployed before cutover
Every legacy URL mapped to its BigCommerce equivalent. Search engine optimization equity fully preserved on day one.
All integrations tested on staging before a single line goes live
ERP, PIM, 3PL, Klaviyo, and payment gateways validated in parallel with the build.
Rehearsed cutover with a 15-minute rollback window
Your go-live runs like a controlled deployment, not a leap of faith. We have run this before.
Fixed 45-day sprint with a contractual go-live date
Daily progress updates. Scope locked before build begins. Launch date committed on day one.
Replatforming process
From Discovery Call to Live BigCommerce Store in 45 Days
Five structured phases, one fixed launch date. Every URL mapped, every integration tested, every cutover rehearsed before your store goes live.
1
Days 1 to 7
Platform Discovery and Audit
Current platform scoped, integrations mapped, data volumes counted, complexity rated.
2
Days 8 to 14
Data Architecture and Search Engine Optimization Mapping
Every URL mapped to its BigCommerce equivalent. 301 redirect plan signed off before build.
3
Days 15 to 28
Build and Integration Transfer
Theme migration, custom functions, and all integrations rebuilt on staging in parallel sprints.
4
Days 29 to 38
Staging Quality Assurance and User Acceptance Testing
Full checkout, search, speed, and integration quality assurance. Your team runs final user acceptance testing sign-off.
5
Days 39 to 45
Cutover and Go-Live
Final data sync, DNS cutover, 30-day post-launch monitoring window active.
Platform Discovery SummaryIn Progress
Platform
Shopify Plus
Target
BigCommerce Enterprise
Total SKUs
12,847
Order history
184,920 orders
Integrations mapped8 of 8
Custom functions scoped14 identified
Risk complexityMedium-High
Estimated timeline45 days confirmed
URL Mapping Table4,218 / 4,218 mapped
| Legacy URL | New URL | Status |
|---|---|---|
| /collections/jackets | /outerwear/jackets | 301 |
| /products/wool-coat | /outerwear/jackets/wool-coat | 301 |
| /pages/size-guide | /size-guide | 301 |
| /blogs/news/* | /blog/* | 301 |
Search engine optimization equity preserved:
99.2%Orphaned URLs: 0
Theme migrationDone
Custom checkout logic
72%
Enterprise resource planning (Netsuite)
integrationDone
Klaviyo reconnect
45%
3PL (ShipBob) APIScheduled
Payment gateway (Stripe)Done
Product review migrationDone
Sprint velocityOn track — launch in 17 days
Checkout flow(14 scenarios)
14 / 14 PassSearch and filters(21 scenarios)
21 / 21 PassCore Web Vitals (mobile)LCP 1.8s - Pass
301 redirect validation(4,218 URLs)
4,218 / 4,218 PassGoogle Shopping feedPass
Enterprise resource planning order syncUser acceptance testing pending
Ready for user acceptance testingAwaiting your sign-off
Store is LIVE — BigCommerce
DNS propagationLive - 23 min
Final data syncComplete (0 delta)
SSL certificateActive
CDN purgeDone
Error rate (last 15 min)0 errors
First transaction processed4 min after go-live
Rollback windowClosed - launch confirmed
30-day post-launch monitoring now active. Daily reports
in your inbox.
What your migration includes
Every layer of your store, moved without missing a detail
A replatform is not just moving products. It is your catalog, your orders, your customer history, your integrations, your search engine optimization equity, and your custom logic. All of it, handled.
Complete data migration
Products, variants, images, orders, customers, reviews, and gift card balances. Counted in, counted out. Integrity report delivered before cutover.
Products and variantsOrder historyCustomer accountsReviews
Search engine optimization equity preservation
Every indexed URL mapped to its BigCommerce equivalent. 301 redirect plan submitted for your approval before a single page moves to staging.
99.2%average search engine optimization equity preserved across
migrations
Integration reconnection
Enterprise resource planning, product information management, 3PL, Klaviyo, payment gateways, and review platforms. Each reconnected and tested on staging before the cutover date is confirmed.
Enterprise resource planningProduct information management3PLKlaviyoPayment gateways
Theme migration and custom development
Your existing front end rebuilt natively in BigCommerce Stencil or a headless stack. Custom functions, checkout scripts, and storefront logic transferred with full test coverage.
- Stencil or headless (Next.js)
- Custom checkout scripts transferred
- Mobile-first performance benchmarks
- Full code handover with documentation
30-day post-launch monitoring
Daily error reports, search console monitoring, and integration health checks for 30 days after go-live. Fast resolution built into the sprint.
Monitoring active on your store after launch
Budget guidance
Scoped before work starts
Line-by-line pricing in your proposal. No commitment required to receive an estimate. Budget ranges: from assessment-only to full enterprise migration.
Client proof
Platform migration that scaled revenue to $70M
Home furnishingsMulti-channel retailPlatform migration
About the client
Half Price Drapes is a multi-channel home furnishings retailer selling window treatments, bedding, and decor across ecommerce and physical channels.
The problem
Data fragmented across multiple systems. Real-time inventory visibility was absent. The ecommerce platform could not support the scale of the business or the complexity of their operations.
What we did
Unified inventory, orders, and customer data through a full platform migration and enterprise resource planning integration. A new ecommerce theme replaced the legacy build with conversion-focused, mobile-optimized design across all channels.
Klaviyo was implemented to replace a fragmented email system with lifecycle automation for a large subscriber base. Real-time dashboards replaced manual reporting.
The result
$0M+
Annual revenue post-migration
Integrated analytics improved operational efficiency. Inventory management and customer experience improved across all sales channels. Optimized ecommerce systems and targeted marketing drove consistent conversion growth in a competitive market.
Why migrations fail
What makes a migration succeed or fail
The migration itself is not the hard part. The planning, sequencing, and cutover discipline determine whether your rankings hold and your revenue continues on day one.
Capability
Typical agency
Redefine
Search engine optimization URL mapping and 301 redirect plan
Integration quality assurance on staging before cutover
Fixed 45-day go-live timeline committed upfront
Zero-downtime DNS cutover with rollback plan
Data integrity report before cutover
30-day post-launch monitoring included
Cutover rehearsal before go-live weekend
Migration questions answered
Real objections from ecommerce teams who have been through this. No platitudes.
They should not, provided the migration is executed with a complete redirect map. Every indexed URL on your current platform is mapped to its BigCommerce equivalent. 301 redirects are deployed and validated on staging before your DNS record changes. Search console is monitored daily for the first 30 days post-launch. Ranking drops typically occur because redirect maps are incomplete or untested, not because of the migration itself.
Most stores complete in 45 days from project kickoff. Stores with complex integrations, large catalogs (over 50,000 SKUs), or custom B2B logic may require 60 to 75 days. Your go-live date is committed at the start of the project, not estimated. The audit in week one determines whether your store fits a 45-day or extended track before any build work begins.
Products and variants, images, pricing, inventory, all order history, customer accounts and addresses, product reviews, blog content, and gift card balances. Every data object is counted in the source platform and verified against the count in BigCommerce before cutover. A data integrity report is shared with you before the go-live date is confirmed.
Yes. Every integration is mapped in the audit phase and reconnected on staging during the build. Common integrations include NetSuite, Brightpearl, Cin7, ShipBob, ShipStation, Klaviyo, Yotpo, Stripe, Braintree, and Google Shopping. Integration quality assurance runs in parallel with theme and function development so that all connections are validated before the cutover date is locked.
Every cutover includes a documented rollback plan with a 15-minute decision window. If a critical issue is detected in the first 15 minutes post-DNS change, DNS is reverted and the previous platform comes back online within minutes. The cutover process is rehearsed in a full dry run on staging the week before go-live so every team member knows the exact steps. A live rollback has not been required on any project in the last two years.
Migration cost is scoped based on catalog size, integration count, and custom functionality requirements. Assessment-only projects start from $2,500. Standard migrations (under 5,000 SKUs, up to 4 integrations, theme migration) typically range from $8,500 to $18,500. Complex migrations with custom B2B workflows, large catalogs, or multiple integrations are priced after the audit. No commitment is required to receive a scoped estimate. See the full cost breakdown on the BigCommerce migration cost page.
Is this right for your store?
Is this the right move for your store?
Not sure? Tell us your situation and we will be straight with you.
A good fit if you are
- Currently on Shopify, Magento, WooCommerce, or a custom platform and hitting platform limits on B2B, catalog scale, or checkout customization
- Generating over $500K per year and scaling, where platform fees or performance limitations are directly limiting growth
- Needing search engine optimization preservation as a hard requirement, not an afterthought
- Operating with integrations that need to stay live through the migration with zero disruption to fulfillment or order management
Not a good fit if you are
- Pre-revenue or just launched, with under 500 SKUs and no existing search engine optimization equity to preserve
- Looking for a redesign only, without needing to change platform. A theme or user experience project is the right answer, not a full migration.
- Expecting the migration to solve conversion problems that are primarily user experience or merchandising issues on your current platform
- Planning to migrate back to Shopify or another platform. We only migrate to BigCommerce and we only take projects we can complete well.
Not sure which category you fall into? Tell us your situation and we will give you a straight answer, including if BigCommerce is not the right move.
Start your migration
Submit your brief. Get a scoped proposal in 3 days.
No commitment. No pitch. A scoped, line-by-line proposal based on your actual store size, integration list, and go-live target.
Call within 48 hours
Proposal in 3 days
127 replatforms completed
Code ownership from day one
Call within 48 hours → proposal in 3 days → Migration kickoff within 1 week of sign-off
Brief received
We will review your store situation and send a scoped, line-by-line migration proposal within 3 business days. Expect a call from us within 48 hours to confirm your current platform and go-live target.
Ready to move
Your BigCommerce store, live in 45 days
Submit your brief today and receive a scoped, line-by-line migration proposal within 3 business days. No commitment required. No pitch call first.
No commitment. No pitch. Submit brief → call within 48 hours → scoped estimate in 3 days
Your team's time investment across a full migration is typically 4 to 6 hours per week across the project: one sprint review, async feedback on staging builds, and final user acceptance testing sign-off. We handle everything else.
Replatforms completed
45
Day avg. cutover
99.2%
Search engine optimization equity preserved
30
Day post-launch monitoring