Aetherio: Your Premium Web Agency in Lyon
In a digital world that evolves by the minute, your website is your frontline ambassador. At Aetherio, a Lyon-based web agency dedicated to custom development, we understand how crucial it is to build an online presence that truly sets you apart.
Founded by Valentin Muller, a full-stack developer and UI/UX designer, our agency creates digital experiences that don’t just exist—they perform, convert, and showcase what makes you unique.
Why Partner with Aetherio as Your Lyon Web Agency?
With more than 300 agencies in the Lyon tech ecosystem, how do you choose the right partner for your web project? Here’s what makes Aetherio different:
1. Complete Technical and Creative Expertise
Our team combines advanced skills across every mission-critical discipline:
- Tailor-made full-code development: No pre-made templates—only high-performance, flexible builds
- Distinctive UI/UX design: Memorable interfaces and frictionless experiences built to convert
- Native SEO optimization: Search performance is baked in from the very first wireframe
- Robust technical architecture: Scalable solutions that grow with your business
2. Business Objectives at the Heart of Everything
Unlike traditional agencies that prioritize looks, we start with your commercial goals:
- Deep strategic analysis to grasp your positioning and challenges
- Conversion-driven design to maximize every interaction
- Clearly defined KPIs from day one
- Post-launch performance monitoring for continuous improvement
3. A Tailored Partnership, Not a One-Off Service
At Aetherio, we build trusted relationships based on:
- A limited number of active projects so you get our full attention
- Transparent communication at every stage
- A single dedicated point of contact throughout the journey
- Close collaboration from concept to go-live
Our Services: Everything You Need for Digital Success
Premium Bespoke Website Creation
We specialize in designing high-end websites that mirror the excellence of your brand:
- Premium showcase sites for SMBs and demanding companies
- High-performing, scalable e-commerce platforms
- Sophisticated corporate websites that elevate your brand image
- High-converting landing pages
Every build is crafted full-code, guaranteeing peak technical performance, reinforced security, and complete creative freedom. Explore our web development service
Immersive UI/UX Design Expertise
Design is more than aesthetics—it’s a powerful strategic lever:
- Memorable, distinctive user interfaces
- Optimized user journeys that boost conversion
- Comprehensive design systems for cross-platform consistency
- Engaging animations and micro-interactions
Our design approach draws from the latest trends while keeping usability and efficiency front and center. Discover our design service
Custom Web Development and Applications
For more complex digital needs, we design and develop:
- Progressive web apps (PWA)
- Tailored SaaS solutions
- Extranets and intranets
- Configurators and interactive tools
Our modern tech stack (Vue.js, Nuxt, Node.js) delivers applications that are performant, scalable, and secure. Explore our custom web app service
Search Engine Optimization (SEO) and Web Performance
To ensure your website is seen, we integrate SEO strategy from the start:
- Technical structure engineered for search engines
- Lightning-fast load times (Core Web Vitals focus)
- Information architecture designed for crawling and indexing
- Post-launch monitoring and optimization
- Learn more about our Lyon SEO service
Our Process: Rigorous and Transparent for Exceptional Results
1. Discovery and Strategy
Before we write a single line of code, we dive deep into your business:
- Audit of your current assets and market landscape
- Precise definition of objectives and KPIs
- Persona research and user journey mapping
- Custom digital strategy blueprint
2. Design and Prototyping
The design phase lays the functional and visual foundations:
- Detailed wireframes of key pages
- High-fidelity mockups for every device
- Interactive prototypes to validate the experience
- Collaborative sign-off at each milestone
3. Development and Integration
Our development standards ensure quality and scalability:
- Robust, future-proof architecture
- Responsive, optimized front-end development
- Integration of advanced features
- Rigorous testing (compatibility, performance, security)
4. Launch and Continuous Optimization
Partnership doesn’t stop at launch:
- Training so your teams stay autonomous
- Performance monitoring and user behavior analysis
- Ongoing optimizations based on real data
- Long-term strategic support
Client Feedback: Concrete, Measurable Outcomes
RAVI Groupe — Premium Showcase Site
“Amazing work, and the results are there!
We entrusted Aetherio with a full redesign of our website and we’re more than happy with the outcome. From the beginning, the focus was on SEO optimization to generate more inquiries, and it works!
The site is clear, fast, and showcases our services professionally. Since launch, we’ve seen a sharp rise in calls and information requests.
Thank you for the attentive follow-up and clear explanations throughout the project.
If you’re looking for someone serious and passionate to grow your online presence, I recommend Aetherio without hesitation!”
Christophe R. — CEO, Ravi Groupe
Results delivered:
- 37% increase in conversion rate
- 45% decrease in bounce rate
- Stronger SEO positioning on target keywords
Technical Expertise: Cutting-Edge Tools for Standout Projects
At Aetherio, we carefully curate our tech stack to guarantee performance, security, and scalability:
Front end
- Vue.js/Nuxt.js for reactive interfaces and top-tier performance
- GSAP/Three.js for immersive animations and 3D experiences
- Tailwind CSS for a flexible, cohesive design system
Explore my full expertise in this article: Freelance Nuxt/Vue Web Developer
Back end
- Node.js/Nest.js for performant, scalable APIs
- PHP/Symfony for robust, secure solutions
- MongoDB/PostgreSQL for efficient data management
DevOps & Performance
- Docker/CI-CD for reliable, automated deployments
- CDN/edge computing for ultra-fast load times
- Automated testing to ensure quality and stability
Our ongoing tech watch helps us adopt meaningful innovations while avoiding hype-driven dead ends.
Investment and Value: Understanding the ROI of Your Web Project
We treat your website as a strategic investment, not a line-item expense. Our fees reflect premium quality and the business impact we generate:
Custom Website Creation
- Premium showcase site: Starting at €3,000
- Bespoke e-commerce site: Starting at €10,000
- Custom web application: Tailored quote based on complexity
Here’s why the investment pays off:
- Measurable increase in conversion rates
- Significant boost to brand perception
- Lower long-term maintenance costs
- Scalability that keeps pace with your growth
We also offer monthly support packages for continuous monitoring and optimization of your digital presence.
About Aetherio: Our Story and Philosophy
Founded by developer-designer Valentin Muller, Aetherio was born from a clear vision: craft websites that never compromise between aesthetics, technical performance, and commercial efficiency.
After working with top-tier tech companies like Worldline and TMM Software, Valentin shaped a unique methodology that combines technical excellence with creative sensitivity.
Our team of specialists in development, design, and digital strategy shares a common set of values:
- Uncompromising technical excellence
- Creative innovation powered by business goals
- Radical transparency in our client relationships
- Total commitment to every project
Based in Lyon, we primarily work with ambitious companies across Auvergne-Rhône-Alpes, while supporting national and international clients on select engagements.
FAQ - Questions fréquentes
Let’s Talk About Your Project
Your project deserves dedicated attention and a bespoke approach. We’d love to hear about your digital goals and explore how we can help you reach them.
Book an introductory call with no commitment
Aetherio—Lyon’s web expertise, powering your growth.
