Quobly's €115M Bet on Silicon Quantum Computing
Quobly, a Grenoble-based startup, raised €115M ($133M) in Series A funding to commercialize quantum processors built on standard silicon. The round is led by Bpifrance, STMicroelectronics, and SEALSQ, with participation from the European Innovation Council Fund, Blast, Air Liquide's venture arm ALIAD, and existing investor Innovacom.
Unlike most quantum startups that require exotic materials and custom fabrication, Quobly encodes qubits using spin states in silicon, compatible with existing CMOS manufacturing. This approach allows them to piggyback on the mature semiconductor supply chain, potentially slashing costs and accelerating scalability.
The Funding and Partners
The Series A is a significant jump from the €21M raised last year to develop a 100-qubit chip. The investor lineup reflects Quobly's strategy: STMicroelectronics, one of Europe's largest chipmakers, brings fabrication expertise; Bpifrance provides state-backed patient capital; SEALSQ adds sovereign infrastructure credentials. This mix signals Europe's determination to keep quantum manufacturing on home soil.
Roadmap: Alloy Pioneer by 2026
Quobly plans to launch its first commercial machine under the Alloy brand. The Alloy Pioneer system will be accessible via cloud by end of 2026, targeting early adopters in HPC and research. Full integration into HPC infrastructure is slated for 2027. This phased rollout emphasizes integration with existing supercomputing rather than a standalone quantum system.
Technical Approach: Spin Qubits on Silicon
Quobly uses spin qubits, where quantum information is stored in the spin of an electron or nucleus. These qubits are fabricated using standard silicon processes, leveraging decades of manufacturing optimization. The company's 100-qubit chip is a milestone, but fault-tolerant quantum computing remains unproven. The bet is that manufacturability will trump raw qubit counts in the long run.
The Competitive Landscape
Spin qubits compete with superconducting circuits (Google, IBM), trapped ions (IonQ), photonics (Xanadu), and neutral atoms (QuEra). No architecture has demonstrated decisive fault-tolerant advantage at scale. Quobly's differentiation is its reliance on existing fabs, which could enable faster scaling if the physics holds.
Why This Matters for Developers
If Quobly succeeds, quantum computing could become accessible via cloud APIs sooner than expected. Developers familiar with classical HPC might integrate quantum kernels into existing workflows without specialized hardware. The use of standard silicon also means lower cost per qubit, potentially democratizing access for research and experimentation.
Risks and Caveats
Spin qubit technology is not yet proven at scale. A 100-qubit chip is a long way from a fault-tolerant quantum computer. The field is still pre-commercial, and competing architectures may leapfrog. Quobly's success hinges on physics, not just funding.
Conclusion
Quobly now has €115M and a chipmaker partner to test its silicon hypothesis. The first cloud machine is due by end of 2026. Developers should watch for early access programs and consider how quantum might augment classical workloads.
