CubeFabs, a Brooklyn-based startup promising to upend how the world manufactures computer chips, raised $6.56 million in a seed round from investors including Impatient Ventures, according to CB Insights, though the full investor list has not been independently confirmed. The company declined to confirm the funding details, which had not been previously disclosed.
The financing, which CB Insights lists as closing circa 2023, brings total capital raised to $6.56 million for a venture that might charitably be described as ambitious: prefabricated semiconductor factories that assemble in under a year and cost a fraction of what Intel or Samsung spend on fabrication plants.
CubeFabs emerged in 2026 from a rebranding of Nanotronics, a company founded in 2010 that made AI-powered inspection equipment for chip and biotech manufacturers. Now it's building what CEO Matthew Putman calls modular "Cubefab" units capable of churning out gallium oxide power chips for electric vehicles and data centers.
"It's like the Ikea of factories," Putman said.
Whether the analogy holds beyond marketing appeal remains to be seen. Traditional semiconductor plants can require years to construct and billions in investment. CubeFabs says its modular facilities install for between $30 million and $40 million, occupy 25,000 to 60,000 square feet, and become operational within twelve months. The economics, if they work, could alter who gets to own chip manufacturing capacity.
Automation at the Core
Each CubeFabs facility runs on what the company calls its nControl platform. The software uses real-time AI-driven process control to spot and correct manufacturing defects as production unfolds, an approach that theoretically reduces waste and speeds output.
A cluster of four fabs requires somewhere between 37 and 180 workers, depending on configuration, and costs under $100 million to build, Putman told Fast Company. By comparison, a single conventional fab can exceed several billion dollars depending on specific technologies and scale. TSMC's largest facilities process around 20,000 wafer starts monthly; CubeFabs' initial deployments will handle a few hundred.
The discrepancy in scale matters less if the company can prove its thesis. Jack Dreifuss, founder of Impatient Ventures and an early backer, framed the opportunity in stark terms. "If they can build these facilities at this cost, it fundamentally then turns all this manufacturing upside down," he said.
That's the bet, anyway.
Gallium Oxide Gamble
CubeFabs is staking its future on gallium oxide power devices, an ultra-wide bandgap material that offers higher breakdown voltage than silicon, silicon carbide or gallium nitride. Those characteristics make it appealing for high-voltage applications in EVs, data centers and telecommunications infrastructure, but the material has proven difficult to manufacture at commercial scale.
"Our first focus is Gallium Oxide," the company explained in materials detailing the rebrand from Nanotronics. The startup said the material was "previously too challenging for commercial production due to high defect rates," a problem its AI inspection and control systems purportedly address.
Gallium oxide remains commercially nascent. Japanese firm FLOSFIA announced progress toward mass production of alpha-gallium oxide devices late last year, while Novel Crystal Technology supplies beta-gallium oxide substrates and epitaxial wafers. Whether CubeFabs can succeed where others have struggled will likely depend on how well its automation actually performs once fabs are running.
From Tools to Factories
Putman and co-founder John Putman launched Nanotronics to build AI-powered inspection systems for semiconductor and biotech manufacturing. The company raised approximately $31 million in a 2017 Series D led by Investment Corporation of Dubai, and roughly $32.55 million in a 2022 Series F-2, according to Forge Global secondary-market data. OrbiMed invested an undisclosed sum in January 2024 to advance the inspection technology in healthcare manufacturing.
"After creating more than 150 patents," the company said, Nanotronics shifted from selling inspection tools to "designing the factories themselves." The original nSpec inspection platform now operates under a separate entity, Nanotronics Inspection Systems.
CubeFabs operates from 63 Flushing Avenue in Brooklyn's Navy Yard. LinkedIn lists the company's headcount between 11 and 50 employees, though such figures can lag actual staffing levels. Anwaar AlMahmeed serves as president of Nanotronics and co-founder of CubeFabs. Alice Globus is CFO.
The Democratization Pitch
Putman positions the venture as something more than a manufacturing play. "We're democratizing the ownership of semiconductor fabs," he said, suggesting that lower capital requirements could allow new entrants into a market historically dominated by a handful of giants with deep enough pockets to survive the brutal economics of chipmaking.
The startup is targeting customers in automotive, data center, aerospace and defense sectors, according to its website. Each automated Cubefab requires about 30 people to operate, Putman said, though presumably the upper end of that 37-to-180 worker range for four-fab clusters accounts for additional administrative and support staff.
Whether modular fabs can truly compete with established players building at enormous scale remains an open question. But in an industry where supply chain vulnerabilities and geopolitical tensions have governments scrambling to secure domestic chip production, CubeFabs is offering something appealingly tangible: factories you can set up before the next funding round closes.
