S-Transistors raises €2.6 million pre-seed round to introduce a unique superconducting transistor platform for scalable orchestration of quantum computers Press release 31 August 2026 The new Finnish startup is disrupting the ways of controlling large-scale quantum computers by delivering a completely new class of electronic devices – superconducting transistors. These novel devices combine the computational power of transistors with the ultra-low power dissipation of superconductors. S-Transistors is developing first-of-its-kind quantum motherboards that will provide energy- and cost-efficient orchestration of cryogenic quantum computers at scale. Newly launched Finnish startup S-Transistors, originating from VTT Technical Research Centre of Finland, has raised €2.6 million in pre-seed funding to pioneer a fundamentally new class of integrated circuits based on superconducting transistors. The technology has several promising applications, from energy-efficient classical computing to spacecraft electronics, but quantum computing, in particular, stands to benefit most. Today's cryogenically cooled superconducting quantum computers need a paradigm-changing solution to break the scaling limit of the quantum processing unit (QPU) — the array of quantum bits that, by analogy to a conventional CPU, does the quantum computing. That limit comes from the power-hungry, poorly scalable way quantum processors are controlled today: multiple expensive, bulky cables per qubit, running from the processor inside the cryostat out to room-temperature electronics. This is exactly where S-Transistors' superconducting transistor technology, which is already available at wafer scale, offers a solution that is radically more energy-efficient and compact than existing alternatives. The funding round was led by Lifeline Ventures, a leading Nordic investor, and joined by an angel investor. S-Transistors is going to use the pre-seed funding to develop several product prototypes for cryogenic signal control and handling, set up its own cryogenic laboratory, establish a manufacturing pilot line for its unique integrated circuits based on superconducting transistors, and grow the team. "Today's efforts in