BigCommerce to Shopify. Without losing your SEO.

A standard BigCommerce to Shopify migration runs 4-8 weeks for a mid-market store with 1,000-5,000 products, a Stencil theme to rebuild, 8-15 third-party apps to map, and a complete URL redirect plan. Smaller catalogs (under 500 products, simple theme, 3-5 apps) ship in 3-5 weeks. Enterprise migrations onto Shopify Plus with B2B catalogs, custom checkout customization, multi-region storefronts, or ERP integration push timelines to 10-16 weeks. The long poles are usually the theme rebuild (Stencil and Liquid are different enough that templates do not port directly) and the URL parity plan (BigCommerce default URL structures do not match Shopify default URL structures, so a complete mapping is required to preserve SEO). Plan for at least one week of post-launch monitoring before you call the migration done.

BigCommerce to Shopify migration in 2026 runs $8,000-$150,000 depending on scope. Small store (under 500 products, design-as-is theme adaptation, basic redirects): $8,000-$15,000. Mid-market (1,000-5,000 products, custom theme, 8-15 app re-implementations, complete URL redirect map): $20,000-$50,000. Enterprise migration to Shopify Plus (5,000-plus products, B2B catalogs, custom checkout, multi-region): $50,000-$150,000-plus. Add 10-20 percent contingency for line items the build will surface during discovery. The BigCommerce platform subscription continues running during the migration window (1-3 months overlap is typical) so factor that overlap into the budget. Headless storefront builds on Hydrogen or Next.js are a separate workflow that runs $80,000-$300,000 on top.

Yes, temporarily, in nearly every migration - but the dip is preventable from being permanent if you do the work upfront. Expected behavior: a 5-15 percent traffic dip in the first 30 days post-launch as Google re-crawls and re-indexes the new URLs, recovering to baseline by 60-90 days and slightly above baseline by 6 months on a clean migration. The brands that lose 20-50 percent of traffic permanently are the ones that skipped the URL redirect map, dropped category structure mid-migration, or rebuilt the theme without preserving meta titles, meta descriptions, and structured data. The fix: a complete crawl of the BigCommerce store before migration (Screaming Frog or Sitebulb, then Search Console export of every indexed URL), a mapped 301 redirect for every URL with organic traffic, and a structured-data parity check post-launch. Plan a 90-day Search Console monitoring window with weekly checkpoints.

No. Passwords are stored as one-way hashes by both BigCommerce and Shopify (correctly, for security reasons), so neither platform can decrypt and re-import them. The standard pattern is to migrate customer accounts (email, name, phone, address book, order history) from BigCommerce to Shopify without passwords, then trigger a Shopify password-reset email to every customer at launch. Shopify supports this via the Customers section and a one-time bulk password-reset action. Plan a customer-communication email 7 days before launch explaining the password reset is coming, and a follow-up email at launch with the reset link. Loyalty-program credentials, store credit balances, and saved payment methods all need separate migration paths - usually app-specific imports rather than a single bulk transfer.

Most BigCommerce apps have direct or close Shopify equivalents because the underlying use cases are common to all ecommerce. Email marketing: Klaviyo runs on both platforms. Reviews: Yotpo, Loox, and Judge.me run on both, with Shopify having more options. Subscription: ReCharge runs on both. Search: Searchanise, Algolia, and Klevu cover both. Analytics: Triple Whale, Northbeam, and Daasity work with both. Loyalty: Smile.io and LoyaltyLion run on both. Where the gap shows up: BigCommerce has stronger native B2B catalog features (customer-specific pricing, quote-to-cart, NET-30 terms) than standard Shopify, so brands using those features need either Shopify Plus's B2B feature set or apps like Sparklayer or Pepper to replicate them. BigCommerce's native faceted search is also stronger than standard Shopify search; replacing it usually means installing Boost AI Search or Klevu on the Shopify side.

Yes, with the right cutover plan. The standard zero-downtime approach: build the Shopify store in parallel under a temporary myshopify.com URL while the BigCommerce store keeps running on the production domain; complete data import, theme build, and full QA on the Shopify side; freeze new orders on BigCommerce for a 4-12 hour cutover window during low-traffic hours; export the final delta of orders, customers, and inventory from BigCommerce; import to Shopify; switch DNS to point the production domain at Shopify; verify, monitor, and reopen orders. Most well-run mid-market migrations achieve under 6 hours of order-taking downtime, and enterprise migrations often hit zero-downtime by routing checkout traffic through both platforms during the transition window. The trade-off is engineering complexity; most brands accept a 4-6 hour Saturday-night cutover as the cleanest path.