A bad migration can set your brand back six months. We have seen stores lose 30% of their organic traffic overnight because redirects were botched and checkout conversions nosedive because nobody tested the new flow on mobile.
A well-executed migration to Shopify Plus can be genuinely transformative. But most agency teams treat it like a standard web project when it is really a high-wire act involving SEO preservation, data integrity, and zero tolerance for downtime. Finding reliable Shopify migration services is the difference between a smooth transition and months of recovery. We evaluated ten migration specialists on volume of completed migrations, how they protect organic rankings, and what happens after the switch gets flipped.
1. Netalico
Fifty-plus Magento-to-Shopify migrations. That number alone puts Netalico ahead of most agencies on this list. But the number clients care about more: an average 40% conversion rate increase after the move is complete. Big Green Egg and Feetures trusted Netalico with the kind of migration where a mistake means real revenue loss, and the results back that trust up.
Their Shopify Plus migration services cover everything a replatforming project demands: data mapping, URL redirect strategies, custom theme development, third-party integrations with NetSuite and SAP, and thorough QA before go-live. Critically, Netalico includes a dedicated SEO audit for ecommerce as part of every migration. That is why their clients do not experience the organic traffic cliff that makes most founders lose sleep during a platform switch.
Founder Mark Lewis (Wharton MBA) built the agency on fixed-price scoping, eliminating the cost overruns that plague hourly-billed migrations. Netalico’s 5.0 Clutch rating across 51 reviews reflects how well it works. Certified Shopify Plus Premier Partner since 2013, with over 300 stores launched and 100-plus Shopify Plus projects shipped. The team builds in Liquid, React, Node.js, Ruby, and Python, keeping everything in-house. Retainer plans for post-launch support start at $5,100 per month.
2. Diff Agency
Canadian, Shopify Plus certified, and built for mid-market brands that need a balance of customization and speed. Diff Agency runs a structured migration methodology from discovery through post-launch optimization. Deep experience with Magento and WooCommerce departures, and they deliver on time more often than not.
3. 1Digital Agency
1Digital Agency, out of Philadelphia, has migrated stores from just about every platform you can name: BigCommerce, Volusion, Magento, custom builds. Proprietary migration tooling automates repetitive data transfer, cutting down on human error. They also bundle Shopify SEO audit services to protect organic traffic during the switch.
4. We Make Websites
We Make Websites treats every migration as a chance to completely redesign your storefront. London and New York offices. Shopify Plus partner. Skews high-end. Timelines run longer than average, but the end product is polished and conversion-optimized.
5. Folio3
Folio3 is built for the hard migrations: tens of thousands of SKUs, custom ERP integrations, multi-store setups. Dedicated QA teams stress-test everything before launch, and their Magento-to-Shopify Plus experience runs deep. If your migration is genuinely complex, they have the muscle.
6. Arctic Leaf
Arctic Leaf, based in San Diego, takes a methodical approach. Detailed pre-migration audits that catch problems before they become expensive surprises. They work best with brands in the $5M to $50M revenue range and tend to stick around after launch through retainer agreements. If you want a migration partner that becomes a long-term development partner, that is their model.
7. The Taproom Agency
Lean team where you work directly with senior shopify developers, not account managers. They handle migrations from Squarespace, WordPress/WooCommerce, and similar platforms for growing DTC brands making their first move to Shopify. Best for founders doing $1M to $5M who want a hands-on partner.
8. P3 Media
P3 Media, based in New York, focuses on what most migration agencies overlook: customer experience during the transition. Loyalty programs, subscription data, customer accounts. P3 also trains your internal team post-launch so you are not dependent on the agency for day-to-day operations.
9. Swanky Agency
Selling in multiple countries? Swanky Agency deserves a close look. UK-based with offices in Australia and France, they specialize in international migrations: multi-currency, multi-language, region-specific storefronts. Their Shopify Markets experience is extensive, and they actually understand the hreflang and localization headaches that trip up agencies who have only done domestic builds.
10. BVA Commerce
BVA Commerce (formerly Brand Value Accelerator) bakes CRO testing into the migration timeline instead of treating it as a separate phase. Your new store launches already optimized. They work with brands in the $10M to $100M range and have migrated stores off Magento, Salesforce Commerce Cloud, and custom-built platforms.
Final Thoughts
Here is the one question that separates a good migration agency from a risky one: ask them to show you exactly how they handled URL redirects and SEO preservation on a recent project. If they get specific with redirect maps and before-and-after organic traffic data, you are probably in good hands. If they hand-wave, keep looking.
Netalico stands out because of sheer volume (50-plus migrations), a fixed-price model that removes cost uncertainty, and the fact that SEO auditing is baked into their process rather than bolted on. The right pick depends on your migration’s complexity, your budget, and whether you need a partner who sticks around after launch day.
