# Custom E-commerce Module Development

> Why have a custom module developed Module marketplaces cover the common needs: reviews, abandoned cart reminders, filters, SEO. They stop where your business becomes specific. A price calculated from dimensions,…

- Page: <https://www.datafirefly.com/en/custom-module/>
- Language: en
- Last updated: 2026-09-24
- Other languages: [fr](https://www.datafirefly.com/module-personnalise/index.md), [es](https://www.datafirefly.com/es/modulo-a-medida/index.md), [de](https://www.datafirefly.com/de/massgeschneidertes-modul/index.md), [it](https://www.datafirefly.com/it/modulo-su-misura/index.md), [pl](https://www.datafirefly.com/pl/modul-na-zamowienie/index.md), [nl](https://www.datafirefly.com/nl/module-op-maat/index.md), [pt](https://www.datafirefly.com/pt/modulo-a-medida/index.md)
- Index: <https://www.datafirefly.com/en/llms.txt>

## Why have a custom module developed

Module marketplaces cover the common needs: reviews, abandoned cart reminders, filters, SEO. They stop where your business becomes specific. A price calculated from dimensions, an order that needs a manager's approval, stock shared with a physical shop, an ERP with no ready-made connector: these are the cases where a custom module costs less over time than stacking three extensions and manual workarounds.

Conversely, if an existing module already covers most of your need, we will tell you during scoping. Adapting an existing module, including one of ours, is often the fastest option.

## Why a module publisher rather than a generalist agency

DataFirefly publishes and maintains its own catalogue of PrestaShop, WordPress, WooCommerce and Shopware modules, documented in eight languages. Every platform update hits our own products first: the move to PrestaShop 9, HPOS storage and the block checkout on WooCommerce, the Vue 3 Administration on Shopware 6.6 and 6.7. Your custom module inherits that practice directly.

## How a project runs

1. **Scoping.** You describe your need in the form above or during a 20-minute call. We write a functional scope: what the module does, what it does not do, and on which versions.
2. **Fixed quote within 24 hours.** A fixed price and a delivery date that no longer change once the scope is approved.
3. **Development and testing.** The module is tested on our environments, then on a copy of your store before going live.
4. **Delivery.** You receive the installable module, the complete source code, the documentation and 12 months of compatibility updates.

## Starting prices by platform

Every quote is based on your scope. These are the amounts we start from:

| Platform | From | Typical lead time |
| --- | --- | --- |
| [WordPress plugin](https://www.datafirefly.com/en/expertise/wordpress-plugin-developer/) | €1,200 | 2 to 4 weeks |
| [PrestaShop module](https://www.datafirefly.com/en/expertise/prestashop-module-developer/) | €1,500 | 2 to 4 weeks |
| [WooCommerce extension](https://www.datafirefly.com/en/expertise/woocommerce-extension-developer/) | €1,500 | 2 to 4 weeks |
| [Shopware 6 plugin](https://www.datafirefly.com/en/expertise/shopware-plugin-developer/) | €2,000 | 3 to 5 weeks |
| [Shopify app](https://www.datafirefly.com/en/expertise/shopify-app-developer/) | €4,000 | 3 to 6 weeks |

The price mainly depends on the interface to build, the integrations with your tools and the part of the store involved: adding a block to a product page does not cost the same as changing the cart calculation.

## Frequently asked questions

**Do I own the source code?**

Yes, on every platform. You receive the full source code, with no licence key or blocking clause, and you can hand it to another provider.

**What do the 12 months of updates include?**

Bug fixes and compatibility with new versions of the platform, of PHP and, for Shopify, of the API. New features are quoted separately.

**Can you take over a module built by another provider?**

Yes. We start with a code audit covering security, compatibility with your version and risky overrides. You then receive a quote to fix or rewrite it.

**Do you work under a non-disclosure agreement?**

Yes. We sign your NDA before scoping if your project requires it, and no custom development is added to our catalogue without your agreement.

**My platform is not listed, can you help?**

Choose "Other" in the form and describe your setup. We reply within one business day, including to tell you honestly if another provider would be a better fit.