Building quantum computers from the qubit up At Nord Quantique, we’re building fault-tolerant quantum computers from the qubit up with the goal of making quantum computing practical at scale. We’re a Canadian company based in Sherbrooke, Québec, where we develop superconducting quantum computers that integrate quantum error correction directly into the hardware. Rather than accept that useful quantum computers will require millions of physical qubits, we’ve taken a different path by designing qubits that are intrinsically more resilient to errors through bosonic encoding. It fundamentally changes the economics and engineering of quantum computing by reducing the hardware overhead needed to build useful systems. We embed error correction directly into the hardware via superconducting bosonic codes to achieve a 1:1 logical-to-physical qubit ratio. The company recently advanced to Stage B of DARPA’s Quantum Benchmarking Initiative and reached unicorn status with a $1.4B valuation in our latest funding round. Reliable computations The biggest challenge in quantum computing isn’t creating qubits—it's performing reliable computations with them. Quantum information is extraordinarily fragile: Every operation, measurement, or interaction with the environment introduces errors that quickly accumulate. Quantum error correction is essential, because it allows errors to be detected and corrected while computations are running. Most approaches achieve this by encoding a single logical qubit across many physical qubits so that individual errors can be identified and corrected. While effective in principle, this strategy comes at a significant cost: It requires vast hardware resources and substantially increases the number of operations needed to perform a logical computation, slowing the effective clock speed of the processor. This combination of hardware overhead and reduced computational throughput is one of the biggest obstacles to building practical, large-scale quantum computers. Bosonic qubits Our approach starts with a different kind of quantum hardware. Instead of engineering devices that behave as simple