Series A · Hardware & Semiconductors · Paris, France · Founded 2020 · 51–200 employees
C12 is a Paris-based quantum computing startup developing scalable quantum computers using ultra-pure carbon nanotubes to achieve high-fidelity spin qubits. Spun out of the École Normale Supérieure in 2020, C12 has raised €18 million in Series A funding to accelerate R&D and aims to deliver application-specific chips for quantum chemistry and optimization. The company operates its own quantum fabrication facility in central Paris and partners with leading industrial players to advance real-world quantum adoption.