Fashion ecommerce software for brands and marketplaces

Shopify works well for fashion brands with a straightforward catalogue and standard checkout requirements. Custom software becomes the right choice when the platform's constraints are creating real operational problems. Common triggers: size run inventory that Shopify's variant limits can't model accurately. Personalisation or loyalty requirements that need a stack of apps that conflict with each other. A wholesale channel that needs customer-specific pricing and ordering rules. Or a rental or subscription model that Shopify's checkout can't support cleanly. If a Shopify configuration would solve the problem, we'll say so. Custom development carries ongoing maintenance cost that a platform absorbs for you. But when the platform is the constraint rather than the solution, a custom build pays for itself.

Size run complexity is one of the main reasons fashion businesses outgrow generic platforms. We model size runs at the SKU level, with stock tracked per size per warehouse location. A sold-out size is marked as out of stock immediately when the last unit sells, without waiting for a manual inventory update. Variant combinations (size, colour, length, fit) are modelled as a matrix so buyers see exactly what's available in their size before selecting colour. Size recommendation logic is built on top of this: the system matches a customer's stated measurements or purchase history against the brand's size chart and returns a recommendation with a confidence level. This prevents the size recommendation from suggesting a size that's already sold out.

The decision depends on ownership of the inventory and the commercial relationship with brands. A DTC platform makes sense when you own the stock and control the fulfilment: you're a retailer buying wholesale and selling on your own platform. A marketplace makes sense when brands manage their own inventory and fulfilment and you earn a commission or fee on sales made through your platform. The operational difference is significant: a marketplace requires per-vendor inventory management, split payments, per-vendor returns handling, and vendor accountability tools. A DTC platform is simpler to operate but requires capital tied up in stock. Some businesses start as DTC and move to a marketplace model as they scale. We build for both and can help you think through which model fits your current operation.

Start with the problem that's costing you the most right now. For most fashion brands, that's either inventory accuracy (sizes showing as available when they're sold out, or sold out when stock is sitting in the warehouse) or the returns process, which is slow, manual, and disconnected from the buying flow. An inventory management tool or a returns management integration with automated restock and refund logic is a focused build with a clear return on investment. Once that's running, you have accurate data to build personalisation and loyalty on top of. Trying to build everything at once usually results in a project that's too large to scope accurately and too complex to deliver in a manageable timeline.

A focused v1 launches in 10 to 14 weeks at a fixed cost agreed before work starts, then grows from there. We scope a smaller first phase honestly rather than quoting the full platform up front.

That fear is common and honest. Adoption is where most of these projects actually die. Merchandising teams who never wanted to be developers need a system that works like the business: size runs managed visually, inventory counts that update themselves, line sheets generated from the catalogue instead of built by hand. The system ships when your team can run a full trading day on it without help.