Frequently asked questions

Querelio is a custom development company: websites, mobile apps, business software, SaaS, automation and artificial intelligence. We do not simply build an application, we bring your project to life, from the first conversation through launch and beyond.

Every engagement starts with a real need: understanding your business, your users and your constraints before writing a single line of code. That listening shapes technical choices suited to your context, not a standard solution.

Yes. We design websites built for your users and your goals: showcase sites, business platforms, e-commerce or more complex web applications. Every site is built with modern technologies, designed for performance, accessibility and search visibility.

We never start from a fixed template. Structure, content and features are adapted to your business and your users, with close attention paid to loading speed and mobile experience.

Querelio designs mobile applications for iOS and Android, native or cross-platform depending on your needs and budget. Every application is built to feel smooth, fast and consistent with your brand.

From the first wireframe to publishing on the app stores, we support you on the technical architecture, the interface and the future evolution of your application.

Yes, this is one of our core areas of work. We design business software, internal tools and custom SaaS platforms to digitalise your processes, centralise your data or save your teams time.

Querelio decides the technical architecture based on your real needs: security, scalability, integrations with your existing tools (CRM, third-party APIs, ERP). The goal is a tool that fits you and evolves with your business.

Yes. We build automation solutions to simplify repetitive tasks, connect your tools together and make your internal processes more reliable, through custom workflows, APIs or integrations between your existing software.

The goal is simple: save you time and reduce manual errors, without complicating your existing habits.

Yes, we integrate artificial intelligence when it brings real value to your project: smart automation, data analysis, business assistants or features built on language models.

Querelio chooses the AI technologies suited to your use case rather than imposing a single solution. AI stays a means at the service of your project, never an end in itself.

Every project has its own quote. The price depends on the complexity of your need, the features you want and the time required to do things properly.

We put together this quote after a first conversation about your project, to offer you a clear, tailored estimate rather than a fixed price grid.

Timelines vary depending on the project: a showcase website can be delivered in a few weeks, while business software or a more complex application takes longer. We set a realistic schedule from the start, with clear milestones and regular progress updates.

Querelio would rather keep a deadline than make an unrealistic promise. The quality and stability of the final product always come before speed of delivery.

Every project follows a clear process: a first conversation to understand your need, a scoping and quoting phase, then design and development in stages. You stay involved at every step, with regular feedback before launch.

After launch, Querelio stays available to adjust, fix or evolve your project. We build a long-term relationship, not a one-off delivery.

Yes, Querelio is based in Saint-Étienne and supports businesses and independent professionals across the region with custom websites, applications and software. Meetings can happen in person or remotely, depending on your preference.

Knowing the local economic landscape helps us better understand the challenges of businesses in the area and propose solutions grounded in their reality.

Yes, Querelio also supports businesses in the Lyon area with their web, mobile and software development projects. Lyon brings together many growing companies with varied needs around digitalisation and custom tools.

Whether you are in Lyon or nearby, Querelio meets in person or works remotely depending on what suits you best.

Yes. Although Querelio is rooted in Saint-Étienne and Lyon, we support clients across France through effective remote collaboration: video calls, shared tools and regular progress updates.

Distance changes nothing about our standards: every project gets the same attention and care, wherever you are based.

Yes, Querelio offers support after launch: fixes, security updates, functional improvements or new features. A project lives and evolves with your business, it does not stop on launch day.

We agree together on a support plan suited to your needs, so your website, application or software stays reliable and up to date over time.

Querelio puts people before technology: we take the time to understand your business and your users before proposing a solution. We do not simply build an application, we bring your project to life, with attention paid to every detail.

Technical choices are decided by Querelio based on your context, not a stack imposed out of habit. Performance, maintainability and security are part of how we build.

Simply get in touch with a few words about your project, even if the idea is not fully defined yet. We set up a first conversation to understand your need, answer your questions and evaluate the best approach.

This first contact commits you to nothing. It simply lays the groundwork for a clear collaboration, before we offer you a quote tailored to your project.