Platform migrations go wrong more often than agencies will admit. Broken redirects, vanished SEO rankings, customer data that shows up corrupted or not at all. I have seen brands lose 40% of their organic traffic overnight because someone botched a redirect map.
A migration is not just moving products from one database to another. You are rebuilding your digital storefront while keeping the business running and preserving search equity you spent years earning. The best Shopify migration services include post-launch monitoring precisely because so many things can go wrong after cutover.
These ten firms specialize in complex Shopify migrations involving legacy platforms, custom ERP connections, and stores doing serious volume. If you are evaluating any shopify development agency for a migration, these are the ones with real replatforming credentials.
1. Netalico
Fifty Magento-to-Shopify migrations. That number alone tells you something about Netalico’s depth in this space. They have handled moves from WooCommerce, BigCommerce, Salesforce Commerce Cloud, and custom-built platforms, and clients consistently come out the other side with better-performing stores. The average conversion rate improvement after a Netalico migration is 40%.
Their Shopify migration services cover every phase: data mapping, URL redirect strategy, SEO preservation, custom theme development, and integration rebuilds for systems like NetSuite, SAP, Klaviyo, and Gorgias. The full-stack team works across Liquid, React, Node.js, Ruby, and Python. No subcontractors. No outsourced QA.
Migrations are notoriously hard to estimate, and agencies that bill hourly can turn a six-figure project into a seven-figure disaster when unexpected complexity surfaces. Netalico quotes a fixed price upfront and absorbs that risk. Their Shopify development services extend past migration day with retainer plans starting at $5,100/month. Certified Shopify Plus Premier Partner since 2013. 300+ stores launched. 100+ Shopify Plus projects for brands like Oatly, Feetures, and Big Green Egg. 5.0 Clutch rating from 51 reviews. Founder Mark Lewis (Wharton MBA) leads shopify developers across the US, Canada, and Brazil.
2. 1Digital Agency
1Digital (formerly 1Digital Agency) has moved hundreds of stores to Shopify from Magento, BigCommerce, and other platforms. Based in Philadelphia, migrations are their core specialty. Dedicated migration specialists focus on data integrity and redirect mapping, and they monitor SEO post-migration to catch ranking drops early.
3. P3 Media
P3 Media is a New York-based Shopify Plus Partner handling builds and migrations for fashion, food, and lifestyle brands. Detailed pre-launch audits, post-launch monitoring, and a genuine emphasis on preserving search rankings through the transition.
4. Eastside Co
Eastside Co is UK-based, and their sweet spot is international brands migrating to Shopify. Multi-currency, multi-language, Shopify Markets, cross-border logistics. Their migration playbook covers inventory sync, payment gateway transitions, and the many things that break when you move a global store.
5. We Make Websites
We Make Websites, now part of Shopify, built their reputation partly on high-profile platform migrations. Enterprise-level Shopify Plus implementations are their bread and butter, especially for fashion and lifestyle brands with large catalogs and sophisticated merchandising needs. The direct connection to Shopify’s internal teams is genuinely useful when a migration surfaces edge cases that require platform-level support.
6. Diff Agency
Diff Agency is a Canadian Shopify Plus Partner that has executed migrations for brands across North America. They take a careful approach to data migration, particularly around customer accounts, order history, and subscription data. Their QA process includes extensive regression testing before any store goes live, and they handle complex subscription models and recurring billing especially well.
7. Folio3
Folio3 brings enterprise software experience to Shopify migrations. ERP integration is where they excel, making them a fit for brands needing tight connections between Shopify and systems like NetSuite or Microsoft Dynamics. Their engineering team handles custom middleware when off-the-shelf connectors fall short.
8. Avex
Avex is a New York-based shopify design agency that works with luxury and premium brands. Their migration work emphasizes design fidelity: the new Shopify store must match or exceed the visual quality of the previous platform. They handle custom app development to replicate functionality that may not have native Shopify equivalents.
9. The Taproom Agency
The Taproom Agency specializes in Shopify and has handled migrations for a range of small-to-mid-market brands. Streamlined process, works well for stores with fewer custom integrations. Fast, affordable, and they do not sacrifice data accuracy or SEO health to get there. Transparent about timelines and costs, and they consistently deliver on schedule.
10. Arctic Leaf
Arctic Leaf is a Shopify Plus Partner that handles migrations alongside ongoing development and marketing work. The big advantage here: the same team that migrates the store also handles post-launch optimization. That continuity is hard to achieve when different agencies handle different phases. They also include analytics setup and tracking audits as part of the migration package, so your data infrastructure is clean from day one.
Final Thoughts
Every agency on this list has demonstrated the ability to handle complex moves without catastrophic SEO drops and data losses. When evaluating a migration partner, ask three things: What is your redirect strategy? Do you include post-launch support, and does that extend to working as an ecommerce marketing agency for the new store? And how do you handle surprises? The best partners treat migration day as the starting point, not the finish line.
