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 Agency Villeurbanne
Web agency in Villeurbanne — Applications & SaaS
We design and build custom web applications, SaaS platforms and MVPs with modern architecture and a trusted expert collective.
A web studio specializing in applications, based in Villeurbanne
Aetherio is a web studio led by Valentin Muller, specializing in custom application development, SaaS platforms and MVPs. We support startups, SMEs and scale-ups from idea to production.
Our strength: solid technical architecture (Vue/Nuxt, Node.js, TypeScript) combined with a network of entrepreneurial partners (UX/UI, SEO, product strategy) brought in as needed.
Every project is built for scalability, performance and long-term evolution — not throwaway websites, but lasting digital products.
Based in Villeurbanne, working across Greater Lyon and remotely throughout France.
Our web agency services in Villeurbanne
From MVP to mature product, complementary expertise for every stage
01
Landing pages & product sites
Conversion pages, SaaS showcase sites, onboarding: fast, SEO-ready interfaces to present and sell your product.
02
Custom web applications & SaaS
SaaS platforms, business tools, back-offices, client portals: modern architecture (Vue/Nuxt/Node), security, multi-tenant and scalability.
03
UX/UI & Product design
Workshops, prototyping, design systems and user journeys designed for engagement and retention.
04
SEO & Content
Technical SEO, internal linking, local semantics (Villeurbanne/Lyon), Core Web Vitals and content strategy.
05
Photo / Video (partners)
Authentic visuals to elevate your brand and boost conversions.
06
3D Animation & Motion Design
3D animations, motion design and visual effects for immersive and memorable digital experiences.
Why choose us?
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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 & transparency
Meetings in Villeurbanne/Lyon, direct contact with the lead developer, no unnecessary intermediaries.
Application expertise
Mastered modern stack (Vue, Nuxt, Node, TypeScript), multi-tenant SaaS architecture, CI/CD and cloud deployment.
Studio agility
Short sprints, regular functional deliverables, quick iterations based on user feedback.
Measurable results
Product goals, SaaS metrics (MRR, churn, retention) and technical performance drive decision-making.
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."
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Sandrine V.
Gérante Sandrin's Nail
"Une entreprise qui sait s'adapter parfaitement au besoin client."
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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 Villeurbanne
Quelle est votre spécialité ?
Nous sommes spécialisés dans le développement d'applications web sur mesure, de plateformes SaaS et de MVP. Nous accompagnons startups et PME du cadrage technique au déploiement en production.
Pouvez-vous développer un MVP rapidement ?
Oui. Nous maîtrisons le cycle MVP : cadrage fonctionnel, architecture évolutive, développement itératif et déploiement. Un MVP fonctionnel est généralement livré en 2 à 4 mois selon la complexité.
Quels budgets pour une application sur mesure ?
MVP dès 8 000€, applications SaaS complètes dès 15 000€. Devis précis après un cadrage de vos objectifs, fonctionnalités et contraintes techniques.
Quelles technologies utilisez-vous ?
Stack moderne : Vue.js, Nuxt.js, Node.js, TypeScript, PostgreSQL, Redis. Architecture API-first, CI/CD, déploiement cloud (Vercel, AWS). Intégration de services tiers (Stripe, auth, emails).
Intervenez-vous au-delà de Villeurbanne ?
Oui, dans toute la métropole de Lyon et partout en France à distance. Nos outils collaboratifs permettent un suivi de projet fluide quel que soit le lieu.
We get back within 24h with an initial technical 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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