When a business owner decides to build an online store with PrestaShop, the first question is usually: "How much does it cost?" But the more useful question is: "What does development actually involve?" Because between installing the platform and launching a working, secure, high-performing store — there are dozens of decisions, each with a direct impact on sales.
This article breaks down what real PrestaShop development consists of, what to expect from the process, and why an agency that specialises exclusively in PrestaShop delivers results a generalist developer or freelancer rarely can.
What Is PrestaShop and Why Do Businesses Choose It
PrestaShop is an open-source e-commerce platform that has been in active development since 2007 and powers over 300,000 stores worldwide. Unlike SaaS solutions, PrestaShop means your code, data and configuration belong entirely to you — no monthly platform fee, no vendor lock-in, no artificial limits on functionality.
The current release, PrestaShop 9.1, is built on Symfony 6.4 and PHP 8.1+. It brings a modernised architecture, a new Admin API, the Hummingbird default theme built with Bootstrap 5, and measurable performance gains over version 8.
The platform is particularly well suited for:
- Stores with non-standard business logic that require custom development
- Businesses that want full ownership of their code and data
- Companies that need native multistore or multi-currency capabilities
- Projects where long-term maintenance costs must be predictable
What Real PrestaShop Development Includes
Discovery and Planning
Every successful store starts not with code, but with understanding the business. Before a single line is written, the agency needs to clarify catalogue structure, pricing logic, required integrations with external systems (ERP, warehouse, couriers), payment methods, and any business-specific requirements.
Skipping this phase is one of the most common causes of expensive corrections later.
Server Environment and Hosting
PrestaShop is self-hosted software — it does not run "in the cloud" by default. It requires a web server (Apache or Nginx), PHP 8.1+, MySQL, and a properly configured environment. Hosting choice directly affects the store's speed, security, and stability.
A specialist agency knows the platform's requirements in detail: caching configuration, PHP-FPM settings, directory structure, file permissions. Everything is configured correctly from the start, avoiding the need to rebuild infrastructure after launch.
Design and Theme
PrestaShop has an official theme marketplace, but the majority of successful stores run on customised solutions. The reason is straightforward: a ready-made theme rarely matches brand requirements, UX needs, and the specific structure of the business precisely enough.
Theme development in PrestaShop involves working with Smarty templates (versions 1.7/8) or Twig (version 9), SCSS, TypeScript, and Webpack. The theme must be optimised for Core Web Vitals — LCP, INP, and CLS — since Google uses these metrics directly in ranking.
When evaluating a Marketplace theme, an experienced agency checks whether it is actively maintained, compatible with the version of PrestaShop in use, and flexible enough to support the required customisation without compromising future updates.
Module Development
Modules are the way PrestaShop extends its functionality. The platform offers thousands of ready-made modules — official and community-built — but non-standard requirements often call for custom development.
Common scenarios for bespoke module development include:
- Integration with local couriers or fulfilment providers not covered by existing modules
- Custom pricing or discount logic
- Connecting to an internal ERP or accounting system
- B2B functionality — group pricing, order approval workflows, credit limits
- Custom reporting and data exports
Writing a quality PrestaShop module requires solid knowledge of the platform's hook system, Symfony services, and Doctrine ORM (version 8+). A poorly written module can slow the store down, introduce security vulnerabilities, or break updates.
Integrations
Most live stores don't operate in isolation. They connect to payment gateways, courier services, warehouse management systems, accounting software, and marketing tools. Every integration requires understanding both sides — PrestaShop's API and the third-party service — and the ability to handle errors, data inconsistencies, and changing business logic.
Catalogue Import and Data Migration
If the store launches with an existing catalogue, or migrates from another platform, importing data is a critical step. PrestaShop includes a built-in CSV importer, but for large catalogues with product combinations, images, and multi-level categories, the native tool quickly reaches its limits. Large-scale operations typically use direct database import or the WebService API.
Testing and Launch
Before going live, the store goes through thorough testing: functional (orders, payments, notifications), performance (speed under realistic traffic), and security (file permissions, protection against SQL injection and XSS, HTTPS configuration).
Going live includes DNS configuration, SSL certificate setup, backup policy, and monitoring.
Why a Specialist PrestaShop Agency Makes a Difference
Depth Over Breadth
A general web agency works across WordPress, Shopify, Magento, React, and a dozen other technologies. A specialist PrestaShop agency knows the platform in depth — its architecture, hook system, performance bottlenecks, and the specifics of upgrading between versions.
That depth shows when something goes wrong: a conflict after an update, a clash between modules, unexpected behaviour in the order flow. A developer without deep PrestaShop experience may spend hours finding a solution that an experienced specialist recognises immediately.
Knowing the Ecosystem
PrestaShop has its own ecosystem of modules, vendors, hosting requirements, and community resources. A specialist agency knows which Marketplace modules are well-maintained, which to avoid, and when it is more cost-effective to build something custom rather than adapt an existing solution.
Long-term Maintenance
The store does not end at launch. The platform receives regular security patches and version updates, new business requirements emerge, and traffic grows. An agency that specialises in PrestaShop can take on ongoing maintenance, version upgrades, and feature development — without the overhead of re-learning the codebase at every engagement.
Single Point of Responsibility
When you work with separate freelancers for design, development, and server management, responsibility becomes fragmented. A specialist agency covers the full stack: server environment, platform, theme, modules, integrations. When something does not work, there is one place to go.
Questions to Ask Before You Sign
Regardless of which agency you are talking to, certain questions quickly reveal the depth of expertise:
- Which version of PrestaShop do you work with, and do you handle upgrades to new major versions?
- Do you develop custom themes and modules, or do you only configure ready-made ones?
- How is post-launch support structured?
- What is your process for migrating from another platform?
- Do you have experience integrating PrestaShop with ERP or warehouse management systems?
An agency that cannot answer these questions concretely is unlikely to be a genuine specialist in the platform.
Frequently Asked Questions
Do I need an agency if I just want a standard store? A straightforward store with a ready-made theme and standard modules can be configured without a developer. Even so, proper initial server configuration, SEO setup, and security hardening require technical knowledge. Mistakes at the start are significantly more expensive to fix later.
How long does PrestaShop development take? It depends on complexity. A store with a ready-made theme and standard modules can be ready in two to four weeks. A project with a custom design, bespoke modules, and ERP integrations typically takes two to four months.
Can I switch agencies after launch? Yes. Because PrestaShop is open-source and the code is entirely yours, you can engage a different agency at any time. It is worth insisting from the start that code is well-documented and consistently structured.
How does PrestaShop development compare to building on Shopify? With Shopify, you pay a monthly subscription, work within a closed environment, and face restrictions on checkout customisation. With PrestaShop, you develop once, own the code, and pay only for hosting and maintenance. At higher order volumes, the difference in ongoing cost becomes significant.
Conclusion
PrestaShop development is a multi-component process — servers, theme, modules, integrations, testing, ongoing maintenance. The right partner is not an agency that does everything, but one that knows this platform deeply.
If you are considering launching a new store or migrating to PrestaShop, get in touch — we have been building and maintaining PrestaShop stores since 2009.