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Most platform migrations go wrong before a single product record is touched. The brief gets signed off, the timeline looks reasonable, and then somewhere between the data audit and the go-live call, something slips. SEO rankings drop. Orders from the legacy platform don't appear in the new system. A custom pricing rule that took six months to build on the old platform doesn't exist in the new one, and nobody flagged it until launch week.
We've seen it happen to brands who went with agencies that treat every migration as a standard checklist job. It isn't. A business moving 70,000 products off a custom ecommerce platform has completely different risks to one moving 500 SKUs from WooCommerce. The data structures are different, the integration dependencies are different, and the cost of getting it wrong is different.
The real risk in a complex migration isn't technical failure. It's underestimating what "complex" actually means before the project starts.
This article explains exactly how Futur Media handles platform migrations for scaling ecommerce brands: what we do at each phase, why we do it that way, and how our approach differs from the generic process you'll read about elsewhere.
Why Most Migration Guides Miss the Point
Search for "how to migrate to Shopify" and you'll find the same process recycled across dozens of agency websites: audit your data, back up your store, map your redirects, test, launch. It's not wrong. It's just incomplete.
Those guides describe the mechanics of a migration. They don't describe the judgement calls that determine whether a migration succeeds or fails for a brand doing real volume with real complexity.
The questions that actually matter before a migration starts are harder:
- Which of your current integrations genuinely need to be rebuilt, and which are workarounds for limitations that won't exist on Shopify?
- Which custom logic in your existing platform is a real business requirement, and which is an inherited quirk nobody's challenged in three years?
- What's the true source of truth for your order history, customer records, and product data — and is it actually the platform, or a connected ERP or PIM?
- What happens to revenue during the cutover window, and how do you minimise that exposure?
Most agencies don't ask these questions until they're already mid-build. By that point, reversing a decision costs significantly more than making the right call during discovery. Shopify's own replatforming guidance acknowledges that data migration planning is a critical element of the planning phase, not an afterthought.
We ask them before we quote.
The Futur Media Migration Process: Phase by Phase
Our migrations typically run over 8 to 12 weeks for complex projects. That timeline isn't padding. It reflects the work required to move a live, revenue-generating store without disruption to customers, without data loss, and without an SEO cliff-edge on the other side.
Here's what each phase actually involves.
Phase 1: Discovery and Data Audit (Weeks 1-2)
Before we write a single line of code or move a single record, we need to understand what we're actually working with.
This means a full audit of:
- Product data: total SKU count, variant structures, custom attributes, metafields, and any product data that lives outside the platform (in a PIM, spreadsheet, or ERP)
- Order and customer history: how far back the data goes, what format it's in, and whether it needs to be fully migrated or partially archived
- URL structure: every active product, collection, and content page URL, cross-referenced against Google Search Console to identify which ones carry organic traffic worth protecting
- Third-party integrations: every connected app, tool, or system, with a decision on whether to keep, replace, or rebuild each one
- Custom functionality: any bespoke logic built into the current platform, assessed against what Shopify natively handles
The output of this phase is a migration scope document. It defines exactly what's moving, what's being rebuilt, what's being retired, and why. It's what we quote against, and it's what we hold ourselves to.
Why this matters: One of the most common migration failures happens when agencies discover mid-project that a "simple" custom pricing rule is actually a 40-hour development job on the new platform. Discovery prevents that.
Phase 2: Data Mapping and Migration Strategy (Weeks 2-3)
Once we know what exists, we decide how it moves.
For large catalogues, we use a structured extract-transform-load (ETL) approach rather than off-the-shelf migration apps. Apps like Cart2Cart work fine for straightforward stores. For a brand with 70,000+ products, custom attribute structures, and multi-tier pricing, they introduce too many variables and too little control.
Our data migration sequence follows a fixed order:
- Products first (variants, images, metafields, pricing)
- Customers second (linked to the product catalogue already in place)
- Historical orders last (these reference both products and customers, so they must come after)
This sequence preserves data relationships and prevents orphaned records. It's the same order Shopify recommends for Magento migrations and it holds true regardless of the origin platform.
For high-volume stores, we also plan a delta migration: a second data import run immediately before go-live to capture new orders and customers added after the initial transfer. This is standard practice on complex projects and something many agencies skip.
Phase 3: Build, Design, and Integration (Weeks 3-8)
With the data strategy confirmed, the build begins. For most migrations, this isn't just a platform switch. It's also an opportunity to improve the store's design, performance, and conversion architecture.
We build on Shopify's native patterns first. That means using Shopify's built-in checkout, collections, metafields, and Online Store 2.0 sections before reaching for custom development. Custom code is reserved for requirements that genuinely can't be met natively, not for replicating the exact behaviour of the old platform.
The distinction matters. Brands that pay to recreate their old platform's quirks on Shopify end up with a slower, more expensive store that doesn't take advantage of what Shopify actually offers.
Integration work runs in parallel with the build. Every third-party tool confirmed during discovery gets connected and tested in the development environment. For brands using tools like Recharge (subscriptions), Gorgias (support), Okendo (reviews), or LoyaltyLion (loyalty), we configure and test each integration before any data is live.
Phase 4: SEO Protection and Redirect Mapping (Weeks 6-8)
SEO is where migrations most visibly fail, and it's where the most recoverable damage happens if the work is done properly.
Our SEO migration process covers:
A redirect to a 404 is worse than no redirect at all. We validate every mapping before it goes live.
Phase 5: Testing and QA (Weeks 8-10)
We don't launch until the store has passed a structured QA process across every critical function.
Testing covers:
- All product pages, variants, and pricing (including any custom rules)
- Checkout flow end-to-end, including payment gateways and tax calculations
- All third-party integrations (subscription flows, loyalty redemption, review submission)
- Mobile performance and Core Web Vitals benchmarks
- All redirects (spot-checked manually for top-traffic pages)
- Order confirmation emails and customer notifications
- Analytics tracking (GA4, pixel events) verified against the old implementation
Where possible, we run a parallel test environment that mirrors the live store. This lets us catch integration-level issues that only surface with real data flowing through the system.
Phase 6: Launch and Post-Launch Monitoring (Weeks 10-12)
Go-live is planned around the brand's trading calendar. We avoid peak periods and, where possible, schedule cutover during low-traffic windows.
Immediately after launch, we monitor:
- First 72 hours: orders processing correctly, payments clearing, analytics firing, all redirects live
- First two weeks: organic traffic and rankings benchmarked against pre-migration baselines
- First 60 days: full performance review covering conversion rate, revenue, and any SEO fluctuations
Post-launch support is built into every migration project. Issues surface after launch. That's not a sign of a failed migration; it's a reality of complex systems. What matters is having someone available to fix them fast.
How the Approach Differs by Origin Platform
The methodology above applies to every migration we run. But the specific risks and technical challenges vary significantly depending on where a brand is coming from.
WooCommerce to Shopify
WooCommerce migrations are the most common type we handle. The main challenge isn't the data volume. It's the quality. WooCommerce stores accumulate years of plugin-generated data, redundant fields, and inconsistent product structures. We clean as we migrate, not after.
Our WooCommerce to Shopify migration service covers full order history transfer, subscription remapping (typically to Recharge), and URL redirect mapping for every active page.
Magento to Shopify
Magento migrations are the most technically demanding. Large catalogues, configurable product types with multiple attribute sets, customer group pricing, and multi-store configurations all require custom ETL work rather than app-based migration.
The most common mistake on Magento migrations: trying to replicate Magento's product attribute architecture inside Shopify. The right approach is to map Magento attributes to Shopify metafields and variants, not to rebuild a Magento-style attribute system on a platform that doesn't work that way.
See our Magento to Shopify migration service for more detail on how we handle the specific technical challenges.
Custom Platform to Shopify
Custom-built platform migrations are the highest-risk category. There's no standard export format, no migration app that handles the data structure, and often no documentation of the custom logic built into the system.
We approach these at the database level. That means extracting data directly from the source database, transforming it into Shopify-compatible formats, and validating every record before import. It's slower and more expensive than a standard migration, but it's the only way to do it accurately at scale.
Our custom platform to Shopify migration service was built specifically for this scenario.
What the Results Look Like in Practice
Methodology is only worth discussing if it produces results. Here's what it looks like in practice.
Campervan Coffee Co: WooCommerce to Shopify
Campervan Coffee Co came to us on WooCommerce with a growing subscription business, a catalogue that had accumulated years of inconsistent data, and a team that needed a platform they could actually manage themselves.
We migrated over 3,000 orders with zero data loss, rebuilt their subscription setup on Recharge, and delivered a conversion-focused Shopify store designed for long-term growth. Post-migration, the store achieved a 6.68% conversion rate — a result that reflects both the quality of the migration and the performance-first approach to the new build.
The full case study is on our Campervan Coffee Co migration page.
Large Catalogue Custom Platform Migration
A separate client came to us on a custom ecommerce platform with over 70,000 products. The scale ruled out any app-based migration approach. We extracted the data at the database level, cleaned and transformed it into Shopify-compatible structures, and imported it cleanly with all product relationships intact. No data loss, no broken variants, no missing images.
That project is one of the clearest examples of why discovery matters. The data complexity wasn't visible from the outside. It only became apparent once we got into the source database, which is exactly why we do that work before we scope.
Key takeaway: The migrations that go smoothly aren't the ones where nothing went wrong. They're the ones where the risks were identified early enough to plan around them.
What to Look for When Choosing a Migration Partner
If you're evaluating agencies for a complex migration, the questions you ask during the initial conversation will tell you more than any case study. A few worth asking:
- Do they run a discovery phase before quoting? If an agency quotes a fixed price from a brief conversation, they haven't understood the project. Accurate scoping requires a data audit.
- How do they handle SEO? Ask specifically about redirect mapping, metadata transfer, and post-launch monitoring. Vague answers about "SEO best practices" are a warning sign.
- What's their data migration approach for large catalogues? If the answer is "we use Cart2Cart", that's fine for a simple store. For anything complex, you want a custom ETL process.
- Who actually does the work? Some agencies use account managers and offshore development teams. At Futur Media, every project is delivered by Gethin directly, with six-plus years of Shopify experience. You're not briefing a project manager who then briefs a developer.
- What does post-launch support look like? A migration isn't finished at go-live. Make sure there's a defined support period built into the contract.
The Futur Media migrations service page covers our full approach, including pricing, timelines, and what's included in every project.
Ready to Move?
If you're running a scaling ecommerce business on Magento, WooCommerce, BigCommerce, PrestaShop, or a custom platform, and you're considering a move to Shopify, the first step is a conversation.
We'll look at your current setup, tell you honestly what's involved, and give you a clear picture of the scope before anything is agreed. No sales pitch. No generic proposal.
Book a free migration consultation and we'll take it from there.
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