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Custom eCommerce agency: B2C and B2B stores that convert

We design custom stores that turn visits into orders, integrated with your payments, your logistics and your ERP.

TapparellaPro · Grimaldi Onofrio · You own the code

In Italy, B2C eCommerce grew from around 27 billion euros in 2018 to around 54 billion in 2023: the market doubled in five years. But the value isn't spread evenly. The stores that grow are the fast ones, well ranked on Google and designed around a clear purchase journey, while generic templates stay invisible. Today the difference isn't made by "having an eCommerce store": it's made by having the right store for your sales model.

As a custom eCommerce agency, we don't start from some theme to install but from your business: what you sell, to whom, with what margins and which processes downstream of the order. From there we design a shopping experience tailored to your catalog — whether you sell to the end consumer (B2C), manage resellers with restricted price lists (B2B), or your products need to be configured to measure before reaching the cart.

We've done this on real projects that are very different from one another: TapparellaPro, an eCommerce store with a made-to-measure product configurator for orders customized to the millimeter, and Grimaldi Onofrio Distribuzione, a B2B platform for the bathroom and construction sector with price lists restricted to resellers. Two opposite needs, the same method: understand first, build second, measure always.

What we build

We build the store around your sales model, not the other way around. The four areas we work on:

  • Custom B2C and B2B stores — storefronts for the end consumer and reseller portals with dedicated login, restricted price lists and pricing, recurring orders and minimum quantities. The same catalog, different sales rules.
  • Conversion-oriented UX/UI — product pages, filters, search and checkout designed to reduce friction and cart abandonment. The visuals are the means; the goal is the completed order.
  • Made-to-measure product configurators — for customizable items or products with many variants (sizes, materials, finishes), as in the case of TapparellaPro: the customer configures, sees the updated price and orders without manual steps.
  • SEO, advertising and email marketing — because even the best store, without qualified traffic, stands still. Organic ranking, paid campaigns and email flows to recover carts and bring customers back.

Integrations: payments, logistics and ERP systems

An eCommerce store that converts but doesn't connect to the rest of the company only creates manual work. That's why integrations are a central part of the project, not an add-on:

  • Payments — cards, digital wallets, cash on delivery and buy-now-pay-later solutions, chosen based on your audience.
  • Logistics and shipping — connection with couriers, automatic cost calculation, label generation and order tracking for the customer.
  • ERP systems — synchronization of records, stock levels, prices and orders: the warehouse and administration stay aligned with no double entry.
  • Invoicing and CRM — automatic documents and customer data ready for your commercial and email marketing strategies.

In B2B this is even more decisive: per-customer price lists, roles and real-time availability must come from your system, not be rewritten by hand.

How we work

A concrete method, in measurable phases, with no surprises at the end of the project:

  1. Analysis — we study products, margins, audience and processes. Together we decide whether you need a B2C store, a B2B portal or both, and which integrations are a priority.
  2. UX and architecture — we define purchase journeys, catalog structure and checkout, before even talking about visuals.
  3. Design and development — building on a modern, fast stack (e.g. Next.js), because page speed affects both Google ranking and conversions.
  4. Integrations and testing — we connect payments, logistics and ERP, then test the entire order flow before launch.
  5. Launch and growth — it doesn't end when you go live: ongoing SEO, advertising and email marketing to grow traffic and sales over time.

You remain the owner of your store and your data: no lock-in that ties you to paying just to stay online.

Who it's for (and who it isn't)

We work well with those who want a sales asset, not a brochure site. In particular:

  • B2C companies that sell to the end consumer and want a store that's fast, well ranked and conversion-oriented.
  • B2B distributors and manufacturers that manage resellers with restricted price lists, differentiated pricing and recurring orders — like Grimaldi Onofrio Distribuzione in the bathroom and construction sector.
  • Those who sell made-to-measure products or items with many variants and need a configurator that automates quotes and orders, like TapparellaPro.
  • Those who already have an eCommerce store that's slow, hard to manage or stalled on sales and want to rebuild it on solid foundations.

If you're looking for the lowest possible price with an off-the-shelf template, we're probably not the right agency: our value lies in the custom store that becomes an investment, not a cost to minimize.

How much it costs and how to get started

A custom eCommerce store doesn't have a single price: it depends on the catalog, integrations, any configurator and the presence of a B2B component. On the Italian market a custom project, with conversion-oriented UX and real integrations (payments, logistics, ERP), typically falls within a clear investment range, while B2B/enterprise projects with per-customer price lists and configurators sit higher up. It costs more than a template at the outset, but over three years the total cost of ownership is often lower — because you avoid the rising fees, slowness and SEO limits of closed platforms.

We've devoted a complete guide to the topic, with real price ranges and the recurring costs that usually no one explains: How much a custom eCommerce store costs in 2026.

The first step is a free discovery call: you tell us what you sell and to whom, and we tell you clearly what's needed, in which phases and with what investment — no obligation.

Frequently asked questions

How much does it cost to build a custom eCommerce store?+

There's no single price: it depends on the size of the catalog, the integrations required (payments, logistics, ERP), whether a product configurator is needed and any B2B component with restricted price lists. A custom eCommerce store costs more than a template at the outset, but over three years it often has a lower total cost of ownership, because it avoids rising fees and limits on speed and SEO. We've published a guide with real-world price ranges for 2026; the most accurate way to get a figure is a free discovery call.

What's the difference between a custom eCommerce store and a platform like Shopify or WooCommerce?+

Closed platforms have a low entry cost but subscription fees and commissions that grow with revenue, along with limits on performance (Core Web Vitals) and technical SEO. A custom eCommerce store built on a modern stack, such as Next.js, requires a larger upfront investment but offers full freedom over the shopping experience, integrations and speed — factors that directly affect organic traffic and conversions. The right choice depends on your sales model and your medium-term goals.

Do you build B2B eCommerce stores with price lists restricted to resellers?+

Yes. We build B2B portals with restricted access, differentiated price lists and pricing per customer, roles, minimum order quantities and recurring orders, synced with your ERP. This is exactly the kind of project we delivered for Grimaldi Onofrio Distribuzione, a B2B platform for the bathroom and construction sector with price lists restricted to resellers.

Can you handle customizable or made-to-measure configurable products?+

Yes, through product configurators. For items with many variants or made to measure — by size, material or finish — the configurator lets the customer build the product, see the updated price in real time and complete the order without manual steps. It's the solution we developed for TapparellaPro, an eCommerce store with a made-to-measure product configurator.

Do you also handle driving traffic to the store after launch?+

Yes, and it's an essential part of the work: an eCommerce store without qualified traffic doesn't sell. We manage ongoing SEO for organic ranking, advertising campaigns and email marketing flows to recover abandoned carts and bring customers back. Launch is the start of growth, not the finish line.

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