California-based Atomic Machines emerged from six years in stealth on October 7, 2026, introducing the Matter Compiler, an AI-native manufacturing system designed to produce functional micro-machines directly from digital code. The company has raised $250 million to date from investors including OneIM, Gigafund, XTX Ventures, KAS Venture Partners, and Valor Equity Partners. Its launch also introduces PrimeSwitch, an electromechanical power relay designed for the high-voltage infrastructure supporting artificial intelligence data centers.
Addressing Manufacturing Limitations
Atomic Machines aims to overcome longstanding limitations in manufacturing microscopic mechanical devices, particularly those requiring complex three-dimensional structures and moving components. Traditional manufacturing methods struggle at extremely small scales, while semiconductor fabrication primarily focuses on producing electronic circuits using specialized processes. The company's technology seeks to bridge this gap by enabling flexible production of miniature machines without requiring customized manufacturing infrastructure for each design.
The Matter Compiler combines precision fabrication, automated measurement, and artificial intelligence to manufacture complete devices with multiple materials and integrated mechanical components. Unlike conventional approaches that require dedicated tooling or extensive process development, the system is designed to manufacture different products using the same infrastructure. This capability could accelerate development across robotics, medical devices, electronics, and advanced cooling technologies.
AI-Driven Production Technology
At the center of the platform is a manufacturing process that continuously measures production operations and makes real-time adjustments to improve accuracy. Artificial intelligence is integrated directly into the manufacturing workflow, allowing the system to conduct experiments and evaluate physical results rather than relying exclusively on simulations. Atomic Machines says this approach enables the production of functional micro-machines with features measuring only a few microns.
The company also expects its technology to change manufacturing economics by reducing the costs associated with introducing new designs. Because production does not depend on conventional tooling, manufacturers could potentially produce individual prototypes and larger volumes using the same equipment. This flexibility is intended to make advanced hardware development more accessible while supporting applications requiring specialized miniature components.
PrimeSwitch Targets AI Data Centers
Atomic Machines' first commercial product, PrimeSwitch, addresses electrical protection challenges emerging from increasingly power-intensive AI infrastructure. As data centers adopt 800-volt direct-current distribution systems, conventional mechanical protection devices can struggle to interrupt dangerous electrical faults quickly enough. PrimeSwitch is designed to combine the efficiency and physical isolation of mechanical relays with switching speeds approaching those of semiconductor-based protection systems.
The PrimeSwitch PS-150 reportedly opens in 50 microseconds, substantially faster than traditional electromechanical contactors operating on millisecond timescales. According to the company, the device supports continuous currents of 150 amperes, provides 1,500 volts of galvanic isolation, and maintains exceptionally low electrical resistance. Its compact, hermetically sealed package measures just 9.5 millimeters across and 3 millimeters thick, making it suitable for space-constrained power electronics.
When integrated into a hybrid circuit breaker, PrimeSwitch works alongside semiconductor components to interrupt electrical faults while minimizing energy losses. The design is intended to deliver rapid protection without compromising the conduction efficiency associated with mechanical contacts. Atomic Machines has begun shipping PrimeSwitch PS-150 units to early-access customers for evaluation, marking an initial step toward commercial adoption.
Leadership and Commercial Expansion
Atomic Machines was founded by Jeff Holden, a technology executive whose previous roles included senior leadership positions at Amazon and chief product officer at Uber. Holden helped develop Amazon Prime and subsequently led initiatives involving autonomous vehicles, artificial intelligence, and advanced transportation technologies at Uber. The company's investor base also includes Construct Capital, Sozo Ventures, Tru Arrow Partners, and the Regents of the University of California.
PrimeSwitch is scheduled for its first public demonstration at the Open Compute Project Global Summit in San Jose, taking place October 12–15, 2026. The event will provide an opportunity to introduce the technology to companies developing data center infrastructure and advanced power systems. Atomic Machines operates from facilities in Emeryville and Santa Clara, California, as it develops its manufacturing platform and initial product offerings.
Atomic Machines' emergence from stealth introduces a manufacturing approach intended to make the production of sophisticated microscopic machines more programmable, flexible, and scalable. With $250 million raised and PrimeSwitch already undergoing customer evaluation, the company is moving from technology development toward commercial validation. Its longer-term prospects will depend on demonstrating manufacturing reliability, economic competitiveness, and broader demand for micro-machines across multiple industries.