7 Best BigCommerce-to-Shopify Migration Agencies in 2026

7 Best BigCommerce-to-Shopify Migration Agencies in 2026

BigCommerce-to-Shopify migration is deceptively easy to underestimate. Product data can be exported. The difficult parts are usually elsewhere: category and URL architecture, product options, customer groups, B2B pricing, Stencil behavior, search and filtering, scripts, payment rules, ERP connections, multi-store setups, and integrations that have accumulated around the platform.

This article compares agencies with public evidence relevant to that source platform. It complements our BigCommerce-to-Shopify migration guide, which owns the technical process, and our general migration-agency comparison, which covers broader partner selection.

Disclosure: Shugert publishes this guide and is included below. No agency paid for placement, and there are no affiliate relationships behind the ranking. We give more weight to named BigCommerce-to-Shopify cases and Shopify-hosted evidence than to generic migration claims.

Last reviewed: September 10, 2026.

Quick answer

Teifi Digital has the strongest current platform-hosted BigCommerce-to-Shopify evidence we found, through Shopify's Busy Bee Tools case. Netalico has a clear named DTC case in Crossrope with a three-month migration and documented post-launch results. eHouse Studio has particularly strong Shopify-hosted evidence through 4ocean. Coalition Technologies is relevant for very large catalogs. Swanky stands out for complex hybrid BigCommerce/Magento and subscription work.

Shugert is included because it publicly documents BigCommerce-to-Shopify architecture and has direct BigCommerce migration experience, but its named public BigCommerce case evidence is less detailed than the top five. For a merchant-first comparison, that should affect the order.

BigCommerce migration agencies at a glance

How we evaluated BigCommerce migration agencies

1. Teifi Digital — Best current Shopify-hosted BigCommerce migration proof

Best for: BigCommerce Plus/enterprise merchants with ERP and omnichannel requirements.

Shopify's public Busy Bee Tools case identifies Teifi Digital as the Shopify Plus Partner for a seven-month migration from BigCommerce. The project included a deep Microsoft Business Central ERP integration, thousands of data points, shipping changes, international expansion, and a future Shopify POS rollout across nine retail locations.

Shopify reports a 20% conversion-rate increase, a 30% page-load improvement, and materially faster fulfillment after the migration. Those results came from a broader transformation, so the more useful selection signal is the operational scope and the fact that Shopify itself hosts the case.

Watch for: The seven-month timeline reflects a broad ERP/omnichannel program, not a universal migration benchmark. Ask Teifi what a project with your specific integration and catalog scope would require.

2. Netalico — Best for US DTC BigCommerce migrations

Best for: Mid-market DTC brands combining a platform move with custom theme work, tracking, and post-launch growth.

Netalico's Crossrope case documents a BigCommerce-to-Shopify Plus migration completed in three months. Scope included a custom theme, app and integration selection, tracking setup, and later international expansion.

The case reports large commercial improvements after launch, but it also acknowledges that the home-workout market was growing rapidly during the COVID period. That context is important: use the case as evidence of successful delivery, not proof that migration alone caused the revenue increase.

Watch for: Ask for a more recent BigCommerce project if your stack relies on current Shopify B2B, Markets, checkout extensibility, or newer enterprise architecture.

3. eHouse Studio — Best for operational simplification and platform recovery

Best for: DTC brands moving away from BigCommerce because development overhead has become a business constraint.

Shopify's 4ocean case documents the brand moving back from BigCommerce to Shopify with eHouse Studio. The story is unusually relevant because 4ocean had previously run on Shopify, moved to BigCommerce, experienced major operational and traffic problems, and then replatformed back.

Shopify reports that the brand saved tens of thousands of dollars in operating costs and recovered web traffic after the return to Shopify. Again, those are brand-specific outcomes; the selection value is that the migration is documented by Shopify and clearly identifies eHouse as the partner.

Watch for: 4ocean is a distinctive "return to Shopify" story. Ask for a BigCommerce-to-Shopify case where the starting architecture resembles your current implementation rather than assuming every migration follows the same path.

4. Coalition Technologies — Best for very large BigCommerce catalogs

Best for: Merchants with tens of thousands of products and a substantial mobile/catalog UX requirement.

Coalition Technologies documents a migration for Magnolia Boutique from BigCommerce to Shopify involving more than 20,000 products. The work included preserving content and the established experience while improving mobile UX, navigation, reporting, and integrations such as PayPal and ShipHero.

The 20,000-product figure is particularly relevant for merchants worried about catalog volume, images, category structure, and validation.

Watch for: Coalition offers a broad digital-marketing service mix. Confirm that the proposed migration team has direct ownership of data, SEO, integration QA, and cutover rather than treating those as separate add-ons.

5. Swanky — Best for subscription-heavy or hybrid legacy stacks

Best for: Merchants whose "BigCommerce migration" is really a broader architecture consolidation.

Swanky's FutureYou Cambridge case involved migration from a hybrid BigCommerce/Magento frontend architecture to Shopify Plus while moving more than 30,000 subscribers to Recharge. The project aimed to reduce technical debt and developer dependency while improving the customer and subscription experience.

That is not a clean BigCommerce-only source, but it is strong evidence for the kind of mixed legacy environment many mature brands actually have.

Watch for: If your store is a straightforward BigCommerce implementation, ask for a simpler BigCommerce-only reference so you can compare scope and cost appropriately.

6. Shugert — Best for SEO-sensitive BigCommerce architecture

Best for: Merchants concerned about categories, product options, multilingual SEO, B2B behavior, and redirect architecture.

Shugert's public BigCommerce migration guide documents direct experience with mature BigCommerce stores, including a recent specialty-retail migration with a multilingual SEO footprint, deep product-option trees, wholesale B2B pricing, redirect architecture, metafield/data modeling, filtering, and Shopify Markets.

The broader migration practice records 30+ complex Shopify migrations and senior engineering ownership.

We place Shugert below agencies with stronger named public BigCommerce cases because the current published example is anonymized. That does not make the work less real, but it makes independent procurement verification harder.

Watch for: Ask for a comparable BigCommerce reference and the exact data/integration scope during discovery.

7. StoreFix — Best for standardized BigCommerce migrations

Best for: Smaller merchants seeking a structured migration service at a lower entry price.

StoreFix's Shopify Partner Directory profile explicitly includes BigCommerce-to-Shopify migration and a named featured project for Viva City, covering catalog, customer accounts, order history, and SEO structure. The profile also publishes entry pricing and reports a high volume of migrations across multiple platforms.

Watch for: For custom Stencil behavior, complex B2B, ERP workflows, or unusual option logic, validate whether the project remains within the standardized migration model or requires custom engineering.

BigCommerce-specific questions to ask an agency

How will product options translate?

BigCommerce can support product option and modifier patterns that do not map one-to-one to Shopify variants. Ask the agency to model difficult representative products before the bulk import.

What happens to categories and faceted URLs?

BigCommerce category paths, filters, and parameterized URLs may have accumulated search visibility and backlinks. The destination information architecture should be designed before the redirect file, not after.

Which Stencil behavior is actually a business requirement?

The old theme does not "migrate." Treat custom Stencil functionality as a requirements inventory and decide whether each behavior belongs in the Shopify theme, an app, a Function, an extension, or nowhere.

How will customer groups and B2B logic change?

If BigCommerce customer groups control price lists, visibility, discounts, or wholesale behavior, the agency should show how those requirements map into Shopify's B2B and customer model.

Who owns ERP and fulfillment reconciliation?

A successful data import does not prove that orders, inventory, fulfillment, returns, and customer-service workflows are correct. Require end-to-end acceptance tests.

Shopify's current BigCommerce migration guide covers product/customer/order data, redirects, integrations, testing, and post-launch stabilization. Google's site-move documentation remains the right baseline for URL changes and redirect handling.

When you may not need an agency

A small BigCommerce store with a simple catalog, minimal custom theme behavior, no B2B pricing, limited organic traffic, and no external systems may be able to migrate with exports/imports and careful QA.

Specialist support becomes more valuable when the store has large option trees, historical orders, content/SEO exposure, ERP or POS dependencies, customer groups, multi-store structures, or a launch window where failure is expensive.

Which agency fits which BigCommerce migration?

Frequently asked questions

Which BigCommerce migration agency has the strongest third-party evidence?

Teifi Digital benefits from a current Shopify-hosted case for Busy Bee Tools. eHouse Studio also has Shopify-hosted evidence through 4ocean. Platform-hosted cases are useful because they are easier to verify than an agency's own aggregate claims.

Is BigCommerce-to-Shopify mostly a data import?

No for most mature stores. Product options, categories, customer groups, search/filter behavior, Stencil customizations, ERP connections, B2B rules and URL architecture usually require design decisions rather than simple transfer.

What should I test before moving DNS?

At minimum, test representative products, options, prices, inventory, customer access, checkout, tax, shipping, integrations, analytics, redirects and high-value organic landing pages. The launch decision should have explicit stop conditions.

Should a BigCommerce migration preserve every old URL one-to-one?

Not necessarily. Preserve search intent and business value. Some URLs should map one-to-one, some should consolidate to a relevant destination, and low-value or obsolete URLs may be intentionally retired. Avoid redirecting unrelated pages just to eliminate 404s.

Final recommendation

Start with the agency whose public evidence resembles your risk. Teifi Digital is particularly compelling for ERP and omnichannel BigCommerce migrations because Shopify hosts the Busy Bee Tools case. Netalico has a clear mid-market DTC example. eHouse has platform-hosted evidence for operational simplification. Coalition deserves attention for very large catalogs, and Swanky for subscription-heavy hybrid stacks.

Shugert is a credible candidate when the migration is SEO- and architecture-sensitive, but buyers should ask for a comparable BigCommerce reference because our public named source-platform proof is currently less complete than the agencies above.

Use the migration selection checklist to compare finalists on data, SEO, integrations, QA, launch ownership, and stabilization—not presentation quality.