Building the future of the web
21dev is a Paris-based web development agency founded in 2023. We believe great software is built at the intersection of design, engineering, and user empathy.
Our Story
What started as a freelance operation quickly grew into a full-service agency. Today, we work with startups, SMEs, and enterprise clients across Europe and North America.
We don't just write code — we solve business problems. Every project begins with understanding your goals, your users, and your constraints.
Our team combines deep technical expertise with a passion for clean, maintainable code. We ship fast, but we never compromise on quality.
What drives us
Quality First
We write clean, tested, and documented code. Every line is reviewed. Every feature is tested.
Transparency
No hidden fees, no scope creep surprises. Clear communication at every stage of the project.
Speed
We ship fast without cutting corners. Agile workflows, automated testing, and CI/CD pipelines.