Cryogenic electronics startup Rhonexum has raised $1 million in a pre-seed funding round.

Led by QDNL Participations and with participation from Venture Kick, the company said the funding will allow it to accelerate product development and expand its engineering team, with the hope of delivering its first product to customers later this year.

Rhonexum has also received non-dilutive funding from a number of Swiss innovation programs, including the École Polytechnique Fédérale de Lausanne (EPFL) Startup Launchpad, the Fondation pour l’Innovation Technologique (FIT), and the Swiss National Science Foundation (SNSF).

Spun out from Switzerland’s AQUA Lab at the EPFL in November 2025, the startup uses proprietary models and software tools to make electronics using standard semiconductor processes that can operate directly within cryogenic systems, such as those used in quantum computing.

“We founded Rhonexum to become the key provider of cryogenic electronics for scalable quantum computers,” said Vicente Carbon, co-founder of Rhonexum. “Our goals are to enable the transition from lab-sized systems to practical, large-scale machines, optimize thermal-load losses, and reduce cabling complexity. Our technology also has future strategic applications beyond quantum, such as in space and advanced sensing.”