A Paris-based AI & Data studio. With the speed of a studio and the rigor of a consulting firm, we help companies design, build, and operationalize modern data platforms and agentic AI systems.
We work across two practices and one in-house product line.
一
Data
Design and deliver the data foundations companies need to operate reliably.
We build modern data platforms from scratch, lead data migration and architecture modernization, develop and industrialize pipelines, and bring clarity to data flows, tooling, and operating models.
data platformmigrationpipelinesarchitecture
二
AI
Build agentic AI systems tailored to real business workflows.
We design grounded agentic solutions, build company brain systems, and run an expert-to-harness process: we interview domain experts, capture how work is really done, and translate that knowledge into controlled AI-agent workflows.
agentic systemscompany brainworkflowsgovernance
三
Products
In-house tools for enterprise AI operations.
Alongside client work, we build tools shaped by real operational needs. DAER — our Distributed Agent Execution Runtime — gives IT and digital leadership teams control over how models, tools, and agentic workflows are used across the organization.
DAERAI governanceenterpriseruntime
Products
We build tools shaped by the same operational problems we solve daily. Same principle, same rigor — productised for broader reach.
In-house product
DAER
Distributed Agent Execution Runtime
A governance and execution layer for enterprise AI operations. DAER gives IT and digital leadership teams control over how models, tools, and agentic workflows are used across the organization.
Admin · Governance — group budgets, license & policy management
Workstation · Employee interface — policy-gated AI assistant
How we work
We don’t ship demos. Every engagement follows the same process: understand the real problem, build the right system, then make sure it actually runs in your organization.
01
Understand the field
We work with business and technical experts to map constraints, workflows, and decision points. Honest assessment of what you need and whether we are the right fit.
→ No deck required
02
Build the right system
We design the data pipelines, agentic logic, skills, and tooling needed for the use case. Deliverables and timeline defined in writing before anything moves.
→ Fixed scope
03
Operationalize with control
We focus on reliability, governance, cost awareness, and adoption so the system can live inside the company — not just in a demo.
→ Senior-led
04
Full ownership
You own everything we build. Code, documentation, architecture decisions. Your team can maintain, extend, or hand it to someone else without us.
→ No lock-in
Portfolio
The studio is built on a decade of hands-on delivery inside major French enterprises. We know what production-grade systems look like because we have built them, at scale, from the inside.
Founding team’s track record
Before Densetsu
10+ years embedded in the data infrastructure of major French enterprises.
EDFThalesSuezAllianzPernod RicardTransavia
EnergyDefenceInsuranceAviationLuxury & Spirits
Densetsu studio engagements
The studio at work
Full-stack data and AI delivery with the crew.
Harcour
Retail SMEData platformAI automation
First of many
Harcour is Densetsu's first full studio engagement. More to follow.
Writing
Technical thinking, made readable.
Architecture breakdowns, design decisions, and use cases from building real systems.