Rhonexum

Rhonexum is an EPFL spin-out developing cryogenic electronics that operate near absolute zero temperatures, enabling scalable quantum computing hardware. The company uses proprietary models and standard semiconductor processes to design components that function within cryogenic environments, addressing a key scalability bottleneck in quantum systems. Product lines include cryogenic integrated circuits (RX-IC), simulation tools (RX-MODEL), and automated measurement systems (RX-AMS). Founded in November 2025, Rhonexum raised $1 million in pre-seed funding led by QDNL Participations with support from Venture Kick and Swiss innovation programs.