01We talk
A first conversation to understand what you want to build, your context and where you want to take it. No endless brief, we get straight to what matters.
Web Studio Lyon
Web agency in Lyon, design & development
We build fast websites, robust web apps and strong brand identities for Lyon businesses.
An agile web studio in the heart of Lyon
Aetherio is a studio led by a lead developer, teaming with experts in Web, SEO, design, content and photo/video.
This model assembles the right team for each project and delivers faster, without traditional agency overhead.
We target measurable performance, adapt to your needs, the trust relationship and the respect of your budget.
Based in Lyon, working across the metropolitan area and remotely as needed.
Web agency services in Lyon
From identity to performance, a complete expertise chain
01
Website creation
Showcase, e‑commerce, corporate: SEO‑ready, easy to manage, fast and conversion‑oriented for Lyon.
02
Web application development
SaaS, portals, back‑offices: modern architecture (Vue/Nuxt/Node), security, scalability and user experience.
03
UX/UI & Branding
Workshops, wireframes, prototyping, visual identity and design systems for clarity and consistency.
04
Lyon SEO & Content
Technical SEO, internal linking, local semantics (Lyon), editorial plan and performance optimization.
05
Photo / Video (partners)
Authentic visuals to elevate your brand and improve conversion.
06
3D creation
Creation of 3D for your projects, websites, applications, visual identities, etc.
Why choose us in Lyon?
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Projects delivered
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Satisfaction
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Years of experience
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Years of studies
Proximity & responsiveness
Meetings across Greater Lyon, tight project control and direct access to makers.
Complementary expertise
Tech, SEO, design, content & media — a team aligned with your goals.
Studio agility
Fewer intermediaries, short cycles, fast decisions and measurable deliverables.
Tangible results
Shared KPIs, Lyon local SEO, conversion, performance and ROI.
Our latest work
SaaS apps, business tools, applications running in production and bringing in revenue. Each one solved a problem a founder could no longer carry alone.
Discover
Kabineo
SaaS Product / Co-foundedKabineo is the SaaS platform for running accounting firms, born from the bespoke Belho Xper tool and turned into a co-founded product, open to every firm.
Produit SaaSCofondateurMulti-tenantNestJS / Vue 3
Discover
Vijile
Desktop Application / Freelance ToolVijile is an automatic, 100% local time tracker for freelancers. It detects your active projects in real time, with zero manual input.
Application DesktopRust / Tauri100% LocalLanding Astro
Discover
Fideneo
Web Application / SaaSFideneo is an all-in-one cockpit designed to simplify and automate beauty salon management.
SaaSUX/UIWeb AppCRM
They trusted us
Founders and business owners who had a project, a need, a deadline. Here's what they have to say.
"Disponibilité, réactivité et implication. Valentin est professionnel et pédagogue."
A
Alban B.
CEO Belho Xper
"Il allie une expertise technique pointue à une solide vision business."
C
Charley A.
Co-fondateur Avnear
"Nous avons travaillé ensemble sur la conception d'une automatisation IA pour un E-commerce. Le suivi a été régulier, clair et efficace. Les délais respectés et le résultat impressionnant."
C
Chihab A.
CEO E-commerce
"Valentin a su être à l'écoute de mes besoins et les retranscrires dans une application de gestion de clientèle. Les résultats ont été plus que satisfaisants et de haute qualité."
S
Sandrine V.
Gérante Sandrin's Nail
"Une entreprise qui sait s'adapter parfaitement au besoin client."
S
Stanislas M.
Commercial
"Le site est clair, rapide, et nous permet de mettre en avant nos services de manière professionnelle. Nette augmentation des demandes."
C
Christophe R.
PDG Ravi Groupe
How we come on board your product
From the first conversation to a product that truly runs in production. A clear process where we act as your product team, not a vendor who ships and vanishes.
01/06
01
02Scoping and strategy
We define the scope, priorities and timeline together. We'll challenge your choices when needed: the goal is the right product, not just a spec that got built.
03Mockups and validation
We design your product and its flow as mockups. You approve everything before we write a line of code, zero surprises down the line.
04Iterative development
We build in functional blocks and you test as we go. We adjust continuously, with regular updates. Never a three-month tunnel with no visibility.
05Production deployment
Deployment, performance, monitoring. Your product goes into production, ready to hold up under load and actually get used, not just to exist.
06We stay on board
Launch isn't the end, it's the start. We watch the real numbers, fix what breaks, and add the features that actually matter. Your product keeps moving forward, and so do we.
FAQ Web agency in Lyon
Êtes‑vous une agence ou un studio ?
Nous sommes un studio dirigé par un lead développeur, avec un collectif d'experts (SEO, design, contenu, média). Agilité et transparence.
Pouvez‑vous gérer un projet 360° ?
Oui : identité, design, développement, SEO et média, un seul pilotage, un seul planning.
Quels budgets pour Lyon ?
Sites vitrines dès 2 500€, e‑commerce/développement spécifique dès 5 000€. Devis détaillé après cadrage.
Intervenez‑vous au‑delà de Lyon ?
Oui, dans toute la métropole et en France, en présentiel et à distance.
Quelles technologies utilisez‑vous ?
Vue.js, Nuxt.js, Node.js, TypeScript, avec intégration CMS (Strapi, WordPress) si pertinent.
We’ll get back within 24h with a first analysis
Discover my resources
Technical Audit Checklist for Vibe-Coded Projects (Lovable, Bolt, Cursor)
Automate Vendor Management and Procurement with AI: The Complete Guide for Businesses
ROI of an AI Project After 6 Months: Key KPIs That Matter Once in Production
Automate Your Competitive Intelligence with AI: The Method and Tools for 2026
AI and Intellectual Property: Who Owns AI-Generated Code or Content?
The True Cost of AI in Production: Beyond the Advertised API Price
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