French Startup Quobly Raises $113 Million to Build Quantum Chips on Silicon

Quobly, a quantum computing company based in France, has closed a €115 million (about $133 million) Series A round. The money will speed up production of its silicon-based quantum processors and put the company’s first commercial machine online before the end of 2026. Bpifrance, SEALSQ, and STMicroelectronics led the round, with backing from the European Innovation Council and several other investors.

A Plan to Build Qubits Like Regular Chips

Most quantum companies build custom hardware from scratch. According to the June 3 press release, Quobly wants to make its qubits the same way chipmakers already produce processors, using 300 mm silicon wafers and a method called FD-SOI. The bet is that existing semiconductor factories can handle the job, which would help with yield and consistency once production scales up.

The first product is called Alloy Pioneer, aimed at early users in high-performance computing and research. Quobly plans to make it available through the cloud in 2026, then install it inside HPC data centers in 2027. The machines are meant to fit into existing computing setups without unusual power or space demands. Customers will write and test programs through Alloy Forge, the company’s development environment, under the same constraints the real hardware imposes.

The Series A follows a €19 million (nearly $22 million) seed phase that ran from 2023 to 2025. During that period, Quobly showed it could make silicon qubits inside standard semiconductor processes and put together an architecture that ties the device, control electronics, and software together.

Why the Backers Are Giving $113 Million to Quobly

STMicroelectronics isn’t just an investor here. The chipmaker is contributing its 300 mm fabrication environment and years of shared FD-SOI work. Laurent Malier, who runs global technology R&D at ST, said quantum computing will only reach the scale HPC customers need if companies can build the systems and integrate with the same rigor as standard chips.

“Quantum computing will achieve the scale needed by HPC customers only if breakthrough quantum systems can be industrialized and integrated with semiconductor-grade rigor and backed by a robust ecosystem. We are leveraging years of shared expertise in FD-SOI and deep technological collaboration to accelerate the commercialization of Quobly’s products thanks to a 300mm silicon fab environment. ST’s investment in Quobly further demonstrates our commitment to support its global ambitions.“

Bpifrance framed its investment around European independence in technology. Gwenaël Hamon, a senior investment director there, said an architecture compatible with existing microelectronics standards lets the technology industrialize faster and stays under European control. Specifically:

“Our second investment in Quobly is fully in line with our ambition to support the emergence of sovereign technology champions. By choosing a quantum architecture compatible with established microelectronics industry standards, Quobly paves the way for the rapid and controlled industrialization of breakthrough technologies, an essential condition to ensure Europe’s strategic autonomy in quantum computing.“

SEALSQ joined as a lead investor, building on a technical partnership it started with Quobly in 2025. CEO Carlos Moreira said combining Quobly’s processors with SEALSQ’s post-quantum security work could produce trusted systems for industrial and critical uses. In his words:

“This investment builds on the technical partnership initiated in 2025. By combining Quobly’s silicon-based quantum processors with SEALSQ’s post-quantum security technologies, this collaboration contributes to the development of secure quantum computing systems. It supports the development of trusted quantum systems for industrial and critical applications.“

Quobly also works with Air Liquide, Soitec, and Orano on materials, cryogenics and manufacturing. CEO and co-founder Maud Vinet described the round as a shift from proving the technology works to actually building products. The company’s goal, she said, is quantum computing that runs inside real industrial environments rather than a lab.