Castagne, creative engineering studio
We embed. We build.
We stay until it holds.
A Paris-based studio with a workshop and a thesis. We embed in hard problems, build the systems that solve them, and iterate physically before anything goes to the field. No playbook. Full ownership.
Over the past decade, we've helped founders raise, helped operators run, and helped researchers ship.
Sensors · Decisions
Research Teams
Healthcare · Education
A studio that thinks in systems
and works in the field.
More hands-on than a consultancy. More strategic than an agency.
We sit at the intersection of product, operations, and engineering. We design the systems, workflows, and tools that help organizations perform better, from early-stage startups to large-scale industrial operators.
No fixed offer. No standard playbook. We embed in the problem, build toward the solution, and stay until it holds.
Sometimes co-founders. Always co-builders.
CASTAGNE acts as the system orchestrator, aligning expertise, tools, software, and field constraints into one coherent operational solution.
The window
is open.
We are in an era of brutal iteration. The cost of sensors has collapsed. AI orchestrates complex systems in real time. Open infrastructure that would have cost millions a decade ago is now free to recombine.
The gap between what can be imagined and what can be built has never been smaller.
But this window won't stay open forever. The knowledge is still distributed, still accessible. The standard of what's possible is rising fast.
Every hour spent doing things the old way is an hour not spent inventing what comes next. We've made our choice.
If it only works in a demo, it doesn't work. Every system must hold under real conditions.
A system that can't sustain itself is a prototype. We design for total cost of ownership from day one.
We don't chase novelty. We pick what has earned its place, then orchestrate it with intelligence.
We dedicate 25% of our time to open source and non-profit initiatives as real production environments.
No frameworks.
No playbooks.
We work end to end, from initial diagnosis to operational rollout. Each mission starts with understanding real-world constraints: the field, budget, people, and time.
Mapping users, constraints, and data flows before anything else.
From idea to functional version in days. Testing in real conditions.
Designed for real-world constraints: budget, people, and time.
We stay until it holds. Measurable outcomes, not slide decks.
Embedded in every mission, from the first diagnosis to the last deployment. Genuinely curious, relentlessly optimistic, and always energized by a new problem to crack. That's what a studio is, at its core: a place where ambition meets craft, and where the work stays human.
The Team you need, without the overhead.
Mobilized per mission, matched to your exact constraints. No table rase. We run in parallel to your existing operations.
De-risking through the tangible
Unlike traditional consulting, we iterate physically in the workshop to de-risk hardware and processes before any heavy investment, confronting technology with the real constraints of the field, industry, and environment.
Got a system to build?
Whether you're exploring an idea, structuring a workflow, or launching a product — we'll help you see it clearly.