The operating system
for autonomous buildings.
Buildings are among the largest, least-programmable systems on earth. We are changing that.
Buildings run on software written thirty years ago — siloed controls, fixed rules, human operators filling the gaps. The world has changed; the buildings have not.
We are building a new foundation: one ontology that every system in a building speaks, AI agents that reason across them, and closed-loop control that lets buildings run themselves. The goal is not a better dashboard. The goal is a building that operates itself.
Buildings are the missing software layer.
of global final energy flows through buildings — the single largest category of human energy demand.
of the buildings that will exist in 2050 are already built. Retrofit, not rebuild, is the game.
since the control stack inside most buildings was designed. It has not kept up with the world above it.
How we think about autonomous buildings.
Ontology first
Every sensor, device, and system speaks one model. Without a shared language, there is no intelligence.
Autonomy over automation
We are not automating checklists. We are building systems that decide.
Closed-loop by default
Prediction is cheap. Acting on it, safely, in the real world, is the work.
From sensor to decision to action — one loop.
┌────────────────────────────┐ ┌────────────────────────────┐
│ sensors & systems │ │ ontology │
│ the building as it is — │─────▶──────│ one shared model every │
│ every device, every │ │ device, system, and │
│ reading │ │ agent speaks │
└────────────────────────────┘ └────────────────────────────┘
▲ │
┆ │
┆ │
┆ closed loop │
┆ │
┆ │
┆ ▼
┌────────────────────────────┐ ┌────────────────────────────┐
│ control │ │ ai agents │
│ the building acts on │──────◀─────│ reason, plan, and │
│ what’s been decided — │ │ negotiate across systems │
│ hvac, lighting, energy │ │ and objectives │
└────────────────────────────┘ └────────────────────────────┘
Intelligence only works when every layer is connected. We build the full loop — not a dashboard on top of someone else's silo.
One building today.
Every building tomorrow.
The city, after that.
Physical AI at civilizational scale starts where people already live and work.
We are a small team in Seoul building toward a very large outcome. We hire engineers, researchers, and operators who want to work on problems of physical scale.
atrn@atrn.ai