BigCommerce development agency, built for B2B scale.

A custom BigCommerce build from a specialist agency typically runs $25,000 to $80,000, with headless and complex B2B projects reaching $75,000 and up. A theme build and launch can start around $15,000. Cost scales with catalog size, custom functionality, and the number of integrated systems. BigCommerce platform licensing, from $39 per month up to custom Enterprise pricing, is paid to BigCommerce separately from build cost. Optimum7 gives you a fixed scope and price before the project starts.

A custom BigCommerce build runs 8 to 14 weeks from discovery to launch. A replatform from Volusion, Magento, or WooCommerce runs 8 to 16 weeks, and a headless Catalyst build or large B2B project runs 12 to 24 weeks. Every project includes a fixed timeline set during scoping.

A BigCommerce development agency builds and customizes stores beyond what themes and apps cover: custom functionality on the open APIs, B2B and wholesale on B2B Edition, platform migrations, ERP and CRM integrations, and checkout and storefront work on Stencil or a headless Catalyst front end. Optimum7 also owns SEO and CRO in house, so the build, the rankings, and the conversion rate stay with one team.

Yes. We build custom fields, logic, and fully branded checkouts on BigCommerce's Open Checkout and Checkout SDK, and tune the one-page checkout for conversion. For headless builds, the checkout is composed through the Storefront API alongside the rest of the custom front end.

Yes. We build headless storefronts on Catalyst, BigCommerce's Next.js framework, connected through the GraphQL Storefront API, and we also run BigCommerce behind a custom WordPress front end. Headless is a fit when the payoff in speed or custom experience justifies the larger build and maintenance over a themed Stencil store.

Yes. Optimum7 has completed 1,000+ migrations. We migrate from Volusion, Magento, WooCommerce, Shopify, and custom carts, carrying catalog, customers, orders, and content across. SEO is preserved with a one-to-one 301 redirect map, titles, metadata, canonicals, and structured data, and we monitor indexation and rankings after launch. See the eCommerce migration services page for the full process.

Yes. We build on BigCommerce B2B Edition with company accounts, customer-group price lists, quote requests, purchase orders, net terms, and tax-exempt purchasing, and we extend it with custom development where the native tools stop. B2B and B2C can run in one store or across separate storefronts, depending on your operation.

Yes. We connect BigCommerce to NetSuite, Salesforce, Brightpearl, and other ERP, CRM, and OMS systems, to 3PL and fulfillment platforms, and to tools like Avalara, QuickBooks, and Klaviyo. Integrations are built and tested so inventory, orders, and customer data stay in sync between the store and the back office.

No. BigCommerce charges no platform transaction fees on orders processed through its supported payment providers, including Stripe, PayPal, and Adyen, on every plan. A small open-provider fee applies only if you process through a gateway outside that supported list, so most stores pay zero platform fees on sales.

Optimum7 is a BigCommerce Elite Partner that builds B2B and wholesale stores on B2B Edition with company accounts, customer-group price lists, quotes, and net terms, extended with custom development where the native tools stop. Optimum7 has shipped 700+ custom functionalities and completed 1,000+ migrations, with a senior U.S. team that owns development, SEO, and CRO in house. Named B2B and catalog builds include RC Superstore, EcoEnclose, and Arlyn Scales.

Look for a BigCommerce partner that can name its live stores, shows case studies with real outcomes in your type of store, builds custom functionality in house, and stays on after launch. Ask who writes the code, since a senior in-house team and an offshore subcontractor produce very different results. Optimum7 is a BigCommerce Elite Partner with a senior, U.S.-based team.

Both. We build for growing brands on BigCommerce's standard plans and for enterprise brands on Performance, with the same process and senior team. If a lighter plan or a different platform fits your stage better, we will say so and scope the build accordingly.

Yes. After launch you can retain the team for ongoing development, new features, platform updates, maintenance, and CRO testing, on a monthly retainer or project basis. The same people who built the store continue to support it.