Is BigCommerce open source?
No. BigCommerce is not open source and is not open-code in the sense of modifying the platform backend. Official positioning is Open SaaS: a proprietary hosted commerce SaaS core (software in the cloud billed by subscription) customized via APIs, apps, and frontends. Some storefront components (for example tooling like Catalyst) can be open source, but the commerce platform itself is not. Shopify is also proprietary SaaS.
BigCommerce or Shopify for B2B in LatAm?
It depends on how much native B2B you need versus apps. If price lists, accounts, and permissions are the heart of the business, BigCommerce often reduces friction. If B2B is a layer on strong D2C or you can sustain apps/Plus/custom, Shopify is viable. In LatAm apply the same filter: ERP, invoicing, and local operations.
Which is better for large catalogs?
On dense, structured catalogs, BigCommerce often feels more comfortable out of the box. Shopify handles large catalogs with good architecture, apps, and data discipline, but you must plan modeling and performance effort. Size alone does not decide: variants, rules, and who owns the data matter.
Which is better if I want headless?
Both have headless paths and APIs. Choose by maturity of the stack your team already uses, cost of sustaining the frontend, and clarity of the data model. Remember: headless does not turn BigCommerce into open source; the core remains Open SaaS / proprietary SaaS, same as Shopify.
Can you migrate from one to the other?
Yes, as a real project: catalog, customers, historical orders (as needed), URLs/SEO, integrations, and training. It is not a button. Budget data cleanup and a controlled coexistence or cutover period.
Do I need a partner agency?
Not always for a minimal pilot. Yes when there is B2B, ERP, headless, migration, or a roadmap beyond templates. A serious partner reduces rework and protects ownership. Useful criteria in how to choose a B2B web development agency.
What about payments and operations in Colombia/LatAm?
Both platforms can operate in the region. Payments, logistics, and invoicing are solved with gateways, carriers, and integrations for your country and current stack. We do not invent exclusive partner lists: the work is validating what you already use, what local compliance requires, and how you sync orders with warehouse and ERP.