Why merchants move off Magento
Magento Open Source and Adobe Commerce give full control over the codebase, hosting and checkout, at the cost of having to manage that infrastructure yourself: PHP and Magento security patching, server or cloud hosting, and PCI compliance for the checkout you host. BigCommerce, as a managed SaaS platform, takes hosting, PCI compliance and platform security patching off your team, in exchange for working within its platform constraints rather than arbitrary code.
A frequent trigger is the same one that pushes merchants toward Shopify: the cost of keeping a developer or agency on retainer to maintain a Magento instance stops making sense once the store's growth no longer justifies that overhead, particularly for stores still running an unpatched Magento 2 instance or lingering on end-of-life Magento 1.
What changes in the data model
Magento's EAV (Entity-Attribute-Value) catalog structure lets you define largely arbitrary custom attributes per product type. BigCommerce's product model is more structured than Magento's but generally more flexible on variants than competing SaaS platforms - it supports a larger number of product variant combinations natively, plus custom fields and product modifiers for attributes outside the variant structure. That still means Magento attribute sets need to be mapped deliberately to BigCommerce's variant options and custom fields rather than copied attribute-by-attribute.
Magento's category tree allows arbitrary nesting with per-store-view display settings, and a product can belong to many categories at once. BigCommerce categories are closer to a traditional tree than Shopify's flat collection model, which makes migrating a deeply nested Magento category structure somewhat more direct - but it should still be reviewed and simplified where Magento's structure has grown organically over years rather than been designed.
URLs, redirects and what's different from Shopify here
Magento URL keys and rewrites are configurable per store view. BigCommerce, unlike Shopify, allows custom URL paths for products, categories and pages without forcing a mandatory /products/ or /collections/ prefix - which can make it easier to retain parts of an existing Magento URL structure. That does not remove the need for a redirect plan: every relevant indexed Magento URL still needs an agreed BigCommerce destination, and any changed URL needs an explicit 301 redirect to reduce broken links and avoidable SEO risk.
Extensions, checkout and multi-storefront
Magento's extension ecosystem and its ability to customize checkout and admin workflows in code have no direct BigCommerce equivalent - BigCommerce uses an app marketplace plus its own APIs and Stencil/Catalyst storefront customization for custom logic. Every active Magento extension needs an explicit decision during the assessment: an equivalent BigCommerce app, a custom build against BigCommerce's APIs, or confirmation it's no longer needed. Magento's multi-website/multi-store model also needs mapping onto BigCommerce's multi-storefront capabilities, which work differently under the hood even where the end result looks similar.
Frequently asked questions
Can BigCommerce handle Magento's custom product attributes?
Through a mix of variant options and custom fields, but BigCommerce has no automatic equivalent to Magento's EAV attribute sets. We map your actual attribute usage during the assessment rather than migrating every attribute Magento happens to have defined.
Is migrating Magento URLs to BigCommerce easier than to Shopify?
Often somewhat, because BigCommerce allows custom URL paths without a mandatory prefix, unlike Shopify's fixed structure. That reduces how many URLs need to change, but every URL that does change still needs an explicit 301 redirect - the audit still has to happen.
What happens to my Magento extensions and custom modules?
Each one gets evaluated individually during the assessment: replace with an existing BigCommerce app, rebuild against BigCommerce's APIs, or confirm it's no longer needed. We flag this list before scoping the project, not after.
Can I keep multi-store or multi-website functionality?
Magento's multi-website model doesn't map directly onto BigCommerce's architecture, even though BigCommerce also supports multiple storefronts. We map your actual requirement - separate brands, regions or currencies - onto the right BigCommerce structure rather than assuming a like-for-like conversion.