Quobly

Quobly develops silicon spin qubits fabricated on a fully depleted silicon-on-insulator (FD-SOI) CMOS process, working with CEA-Leti and STMicroelectronics to build qubit arrays on standard 300 mm semiconductor production lines. The Grenoble-based company's premise is that reusing mature CMOS manufacturing gives a credible route to the large qubit counts that fault-tolerant error correction requires, and it is pursuing a full stack from devices to control electronics and software. It sits among a small group of European silicon-spin efforts betting on industrial scalability rather than niche fabrication.

AI-written profile · not yet reviewed · 17 September 2026

Headquarters: Grenoble, France
Founded: 2022
Status: Private

spin qubit

Investors Quantonation, Bpifrance

Coverage

The Quantum Insider16 September 2026

Quobly Demonstrates Key Quantum Operations on 300 mm Silicon Chip

Quobly reported a demonstration of qubit readout, single-qubit gates, and two-qubit gates on a single chip fabricated with its QSOI technology. The devices were built on a 300 mm silicon wafer, which the company positions as an industrial-scale platform for silicon spin qubits.

OutlookPlausible

If the demonstrated operations have usable fidelities, Quobly could move from single-device demonstrations to small multi-qubit arrays fabricated in a 300 mm CMOS-compatible flow within two years.

spin qubitQuobly