S-transistors

Superconducting transistors: transistor logic with the ultra-low power dissipation of superconductors. First product is a cryogenic multiplexer that cuts the wiring and power needed to control large quantum computers. VTT spinout.

The row

Sector

Quantum

Stage

Pre-revenue — No sales yet

Location

Espoo

Founded

2026

Research origin

VTT

Business ID

3628156-1 · Finnish trade register

Funding

€2.6M pre-seed (8/2026, Lifeline Ventures lead + one angel investor)

Rounds

2026 · EUR 2.6M · equity pre-seed, Lifeline Ventures lead + one angel

Links

Where this sits on the map

S-transistors is one of 10 companies in Quantum. The others:

How this row was decided

Every row on this map is checked by hand against the trade register and the company's own material, and placed in the sector that best describes its business or its technology. Service firms and consultancies are left out, however advanced the technology they work with — the test is where the revenue comes from. Only funding figures the company or its investor has published are shown. The full rules are on the landscape ↗