Atomic Machines has emerged from six years in stealth with the Matter Compiler, a manufacturing system that builds working micro-machines directly from code.

The company says the AI-native system can produce motors and gears the size of a grain of sand, robots small enough to work inside the body, and cooling built into AI chips. Its first product is PrimeSwitch, a power relay that opens in 50 microseconds, about a thousand times faster than a conventional contactor.

PrimeSwitch targets 800-volt power systems in AI data centres, where faults deliver destructive energy in microseconds. The relay is shipping to early-access customers for evaluation.

Founded by Jeff Holden, Amazon’s tenth engineer who built Amazon Prime and later became Uber’s first chief product officer, the company has raised $250 million.

PrimeSwitch debuts publicly at the OCP Global Summit in San Jose on October 12-15.

The system measures every operation with high-precision tools and corrects errors in real time. The AI also runs its own experiments on its own hardware to test what simulation proposes.

Investors include OneIM, Gigafund, XTX Ventures and the Regents of the University of California. The company is based in the San Francisco Bay Area.