Atomic Machines came out of stealth with a machine that builds from code. Its first product is a power relay.
SCIENCE & TECHNOLOGY · OCTOBER 11, 2026
On October 7, 2026, Atomic Machines, a company led by Jeff Holden, came out of six years in stealth. It says it has raised $250 million and built a manufacturing system it calls the Matter Compiler. Its pitch is that you describe a machine in code and the system builds it, with no custom tooling and no process development for each new product. The first thing it has made with that system is a power switch for the data centers that run AI.
What the company announced
Holden's launch post describes the goal as "on-demand, universal command of matter," and the first product as "the Matter Compiler, an AI-native manufacturing system that builds working micro-machines from code alone." He adds: "No per-product tooling. No process development. Different code, different machine." (his post on X, October 8)
The first product is the PrimeSwitch PS-150. Per the company, it is a 150-amp electromechanical relay for power distribution in AI data centers, including the 800-volt direct-current systems those buildings are moving toward. The package is 9.5 mm across and 3 mm thick. The company says it opens in about 50 microseconds, which it puts at roughly 1,000 times faster than a conventional contactor. It is shipping to early-access customers for evaluation. Those customers are not named.
What is independently reported, and what is not
The launch was covered by The Next Web, which confirms the $250 million, the investor list (OneIM, Gigafund, XTX Ventures, KAS Venture Partners, Valor Equity Partners, Sozo Ventures and the Regents of the University of California), the 150-amp rating and the 50-microsecond figure. It also says the 1,000-times comparison is the company's own. Holden's background, as the article gives it, includes joining Amazon as its tenth engineer and serving as Uber's first chief product officer.
What the coverage does not contain is any outside test. There are no third-party lab results, no measured repeatability, no customer names and no production volumes. The article does not report a number of machines built or sold, and the company has not published a price.
What "from code alone" can mean. The launch post says the Matter Compiler builds working micro-machines "from code alone." The coverage does not say how much of the making is automated end to end. Until someone describes the production line in detail, read the phrase as a claim about the design step, not as a description of a fully hands-off factory.
Why a relay is a sensible first product to claim
A relay that opens in microseconds is the kind of part that matters when a fault has to be cut off before it spreads. That is the reason the company gives for the speed. It is also the kind of part a new manufacturing method can be judged on: a single, well-defined device with a rating you can measure. Whether the Matter Compiler can make that device reliably, at volume, at a price a data center buyer will pay, is the question the launch leaves open.
Where this could be wrong
The main risk is that the headline is a demonstration, not a production line. The company says the PS-150 gets its first public demonstration at the Open Compute Project Global Summit in San Jose, October 12 to 15, 2026. That is the first chance for anyone outside the company to see the switch work. Until then, the 50-microsecond and 1,000-times figures are the company's numbers. I have not seen a datasheet, a test report or an independent measurement, and I have not checked the "single-digit micron" feature claim beyond the press coverage.
Sources
- Jeff Holden, launch post on X, October 8, 2026. https://x.com/jeffholden/status/2108283819560472987
- The Next Web, "Atomic Machines emerges with $250M to build micro-machines from code," October 7, 2026. https://thenextweb.com/news/atomic-machines-250m-matter-compiler-micro-machines
