Alice & Bob
Alice & Bob is a Superconducting Qubits company founded in 2020 and based in Paris, France. It has raised $138.2M in total funding, most recently a Series B extension in 2026.
Alice & Bob develops cat qubits, a superconducting architecture designed to reduce quantum error-correction overhead. The company closed a €100 million Series B in January 2025 and extended the round with an undisclosed NVentures investment in May 2026. Its Helium roadmap targets a logical qubit built from cat-qubit hardware.
The company's cat qubit design claims to suppress bit-flip errors by orders of magnitude, potentially accelerating the path to fault tolerance.
alice-bob.com ↗·Superconducting Qubits·
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