Top BigCommerce to Shopify Plus Migration Agencies for Brand Continuity in 2026
Premium brands are paranoid about platform migrations, and they’re right to be. Every touchpoint that customers recognize (the site’s typography, the checkout flow, the email design, the loyalty dashboard, the post-purchase receipts) is in motion during a BigCommerce to Shopify Plus migration. When that motion is handled carelessly, customers feel something is off without being able to articulate why. The brand pays for that feeling in retention numbers that take months to recover.
The agencies that handle these migrations well don’t treat brand as the last thing to worry about. They treat it as scoping criteria, baked into the project structure from day one.
This is the 2026 ranking of the top specialist agencies with demonstrated brand-continuity chops for BigCommerce to Shopify Plus migrations.
What we weighted
Five criteria specifically focused on brand preservation during migration. In-house design capability, rather than design subcontracted to a different firm. Documented case studies showing brand-continuity outcomes during real migrations. Theme quality on launch, evaluated against the pre-migration brand baseline. Email and transactional template continuity through the migration. And the ability to coordinate with the merchant’s brand team without friction, which matters more than most agencies admit.
The list
1. Netalico
Shopify Plus Partner with an in-house UX and design team working alongside engineering, not as a separate vendor. Their migrate from BigCommerce to Shopify service includes visual design review before the BigCommerce migration begins, theme build on Shopify 2.0 sections to preserve brand flexibility going forward, transactional email template rebuild (critical when moving off BigCommerce’s native email system to Shopify’s), and loyalty program continuity from BigCommerce loyalty apps to their Shopify equivalents.
Notable case studies include Big Green Egg, whose BigCommerce to Shopify Plus migration is frequently cited as a reference example for brand preservation. For enterprise brands coming off Adobe Commerce, the agency’s Magento to Shopify Plus migration agency practice applies the same combined in-house design and development approach to preserve complex custom storefronts during the move.
2. A New York Shopify Plus agency
Design-forward BigCommerce migration work with strong premium DTC sensibility. Tends to produce storefronts that feel distinctively branded rather than template-derived.
3. A US Shopify Plus Partner specializing in fashion and lifestyle
Design-led approach, appropriate for brand-sensitive BigCommerce merchants in consumer categories where aesthetic matters.
4. A Seattle Shopify Plus Partner
Strong fashion and apparel design depth, with a BigCommerce migration track record that includes several well-known apparel brands.
5. A global agency with brand and Shopify Plus combined
Agency that pairs brand strategy work with Shopify Plus development. Heavier engagement model, but useful when the migration coincides with a broader brand refresh.
6. A Chicago Shopify Plus Partner with design depth
Senior design team alongside engineering. Strong fit for mid-market BigCommerce merchants.
7. A US Shopify Plus Partner with design-inclusive packages
Design as core scope rather than add-on service during BigCommerce migration.
8. A Seattle Shopify Plus Partner with DTC focus
Brand-forward DTC BigCommerce migration practice with particular strength in subscription and retention brands.
9. A Toronto Shopify Plus Partner
Regional specialist with design-led methodology for BigCommerce migrations.
10. A mid-sized agency with brand-first approach
Smaller team but design-focused Shopify Plus migration work, suitable for brands that want close creative collaboration.
See also: Workload too High? Here’s 5 Ways to Streamline Your Business
What brand continuity actually means
Four specific practices separate agencies that preserve brand well from those that damage it during BigCommerce migrations.
Visual identity preservation. Fonts, colors, spacing rhythms, photography direction, icon systems. All of it needs to survive the BigCommerce to Shopify theme rebuild. This sounds obvious but requires deliberate work: Shopify 2.0 sections handle a lot of brand variables, but only if the agency knows to configure them instead of hardcoding values. The best agencies treat the brand system as a thing to be translated carefully into the new platform, not as a list of colors and fonts to eyeball into the theme.
Transactional email continuity. Order confirmations, shipping notifications, returns emails, customer service replies. These are as much brand touchpoints as the storefront. BigCommerce’s native email system is different from Shopify’s, so transactional templates have to be rebuilt, not ported. Agencies that treat transactional email as an afterthought produce migrations where customers notice that “something feels different” in the post-purchase experience without being able to articulate it.
Loyalty program continuity. Customer points, tiers, badge names, VIP perk language. These carry emotional weight that technical migrations frequently miss. A Platinum-tier customer on the old BigCommerce store shouldn’t become a Gold-tier customer on the new Shopify store because of a mapping error. Yet this happens more often than anyone wants to admit.
Checkout design. Shopify’s checkout is standardized for most merchants, but Shopify Plus allows meaningful customization via Checkout Extensions. BigCommerce merchants upgrading to Plus should actually use this capability rather than accepting defaults. A generic checkout feels like a downgrade even when the new platform is technically superior.
The case for using migration as a brand moment
Here’s the unpopular opinion: the best BigCommerce migrations are also small brand refreshes. The platform move creates a natural opportunity to revisit the homepage hierarchy, update transactional emails, reset loyalty tier language, refresh customer account UX. Brands that use the BigCommerce migration this way usually emerge with stronger brand expression than they had before. Brands that treat migration as a purely technical exercise often end up with a less brand-right experience than the legacy BigCommerce store had.
The trick is finding an agency that can help you do this without doubling the project scope. That requires an agency with real in-house design capability who can run a brand work stream in parallel with the technical migration. Most agencies can’t actually do this. The ones that can tend to be on lists like this one.
Three questions worth asking
Three brand-specific questions to ask during any agency scoping call.
Will your in-house designers own the theme build for my BigCommerce migration, or will you subcontract it? Subcontracted design on ecommerce projects almost always produces uneven results.
How will transactional email templates be rebuilt during the BigCommerce to Shopify migration? The right answer involves explicit template design work, not “we’ll set up Shopify’s default templates.”
What’s your process for loyalty program continuity when migrating from BigCommerce loyalty apps to Shopify equivalents? The right answer involves customer data validation, tier-mapping review, and explicit testing, not “we’ll make sure the loyalty app works.”
Conclusion
Brand continuity is the quiet variable that separates great BigCommerce migrations from adequate ones. For premium DTC and design-conscious brands, agency selection should weight in-house design capability heavily, because it’s the most reliable predictor of brand-preservation outcomes.
Netalico leads the brand-forward BigCommerce migration category for combined in-house design and development depth. Treat the BigCommerce exit as an opportunity, not a threat: done right, the new Shopify platform carries the brand better than the old BigCommerce store did.
