While BigCommerce has a "B2B Edition," it is effectively a bundle of functionality that often relies on external app layers, creating friction compared to Adobe Commerce where B2B logic is baked into the core database schema. Hyvä Checkout allows for creating entirely custom steps, distinct mobile layouts, and integrating bespoke payment logic without the constraints of a SaaS checkout SDK. Native B2B depth ensures faster performance for logged-in B2B buyers.

BigCommerce allows checkout customization via its SDK, but backend logic cannot be altered. If you need a fundamentally different way to calculate tax or split orders at the database level, you hit a wall. Magento allows developers to intercept and modify any class or method via plugins (interceptors), providing true flexibility.