Fab2 announced a $500 million Series A on September 8 for an unusual chipmaking business: building the tools inside a semiconductor factory, then making the factories repeatable. Alongside that hardware, it develops software for engineers designing chips. The company, previously known as Atomic Semi, wants to shorten the path between a design and the equipment that turns it into a physical device.
Its manufacturing approach starts below the level of an entire production line. Fab2 says it builds components such as pumps, valves, sensors and precision actuators, assembles them into machines, and combines those machines into fabs—the industry's term for chip factories. The proposed next step is producing multiple fabs in its own factory. Automation is intended to let the team experiment with manufacturing processes more quickly.
Studio is the design side of the same effort. Fab2 describes it as browser-based, collaborative electronic design automation software: tools engineers use to design chips. The company's ambition is to pair faster design work with faster fabrication, rather than improve only one side. An engineering team needs both a workable design and a way to make it; a faster factory alone does not remove the work that happens before production.
Sam Zeloof and Jim Keller founded the business in 2022. Zeloof became known for making chips in his family's garage, while Keller brought a career in processor design. Tom's Hardware reported the company's rebrand and move toward Texas in July. Fab2 now lists separate sites for chip fabrication in Austin, building fabs in nearby Lockhart, and its original San Francisco operation. Those are different parts of the manufacturing system, not three interchangeable production lines.
The company confirmed a $3.7 billion valuation in its September 8 announcement. Wowtale reported that Fundomo led the Series A, with participants including Naval Ravikant, Corner Capital, Paradigm, Duquesne Family Office and Maverick Silicon. Fab2's own website lists those backers in its Series A section. The new round follows a reported $15 million seed financing in 2023; the valuation is separate from the new capital raised.
The central business question is whether a factory can become a repeatable product. Building one set of tools is different from reproducing it, keeping it working and obtaining consistent output across installations. Fab2's integrated approach gives it control over more of that process, but also leaves more engineering in its own hands. The next useful evidence will be repeatable manufacturing performance, not simply the size of another facility.