Silicon-quantum-computing startup building qubits on standard semiconductor manufacturing processes, with an HPC/data-center-compatible quantum computer line called Alloy.
The bet
Quantum scales only if qubits are built on proven FD-SOI 300mm silicon lines, not exotic bespoke hardware.
€19M seed (2023) plus €21M for the Q100T 100-qubit project (May 2025); €115M Series A (June 2026)
Founded in 2022 in Grenoble as Siquance by Maud Vinet (CEA-Leti) and Tristan Meunier (CNRS), who argued that 15+ years of shared microelectronics research made silicon qubits manufacturable at industrial scale.
Raised a record €19M European quantum-hardware seed in 2023, then €21M in May 2025 to industrialize the Q100T 100-physical-qubit chip. In June 2026 closed a €115M Series A led by Bpifrance, STMicroelectronics and SEALSQ, with EIC, Blast and Air Liquide Venture Capital participating, to move from validation to industrial execution.
Still scaling: first commercial machine (Alloy Pioneer) is slated for cloud access in 2026, with HPC/data-center deployments targeted for 2027.
CEA-Leti and CNRS had 15+ years of joint silicon-quantum research, giving the founders a manufacturable technology base rather than a lab curiosity.
Using FD-SOI 300mm wafers lets Quobly borrow the semiconductor industry's yield, reproducibility and scale rather than building bespoke infrastructure.
Industrial partners invested directly: STMicroelectronics, Air Liquide, Soitec and Orano all back the industrialization story, not just the physics.
The Alloy design deliberately targets existing HPC and data-center constraints, lowering the adoption hurdle for the first commercial machines.
A deep-tech startup can turn a presumed weakness into its moat: if the hard part is manufacturing, bet on the industry that already solved it rather than inventing a parallel one.
As of September 2026, Quobly is in industrial execution: the €115M Series A is closed, Alloy Pioneer is due for cloud access before the end of 2026, and HPC-infrastructure deployment is targeted for 2027. The company is expanding internationally from Grenoble with offices in Singapore and Canada.
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The sources
- Quobly lève 115 millions d'euros en série A pour commercialiser ses ordinateurs quantiques sur silicium Bpifrance · presse.bpifrance.fr ·
- French quantum start-up Quobly bags €115m ahead of market debut Silicon Republic · siliconrepublic.com ·
- SEALSQ Participates as a Lead Investor in Quobly's €115 Million Series A Financing SEALSQ Corp (SEC exhibit) · content-archive.fast-edgar.com ·