Estonian-Dutch deeptech startup Spiral Hydrogen has raised €2.7 million in pre-seed funding to advance its bubble-free electrolysis technology, with backing from byFounders, Norrsken Evolve, and Superangel, alongside €0.7 million in grants.
Founded by Juri Volodin and Fedor Stomakhin, the company combines expertise in electrochemistry, energy systems, and software engineering.
Spiral Hydrogen is developing a rotating, bubble-free electrolyser designed to improve the efficiency of green hydrogen production. Conventional systems can lose a significant share of input energy due to gas bubbles forming on electrodes, limiting reaction efficiency.
Its approach removes this constraint by routing gases through a porous electrode into a dedicated channel, enabling efficiency levels above 90 per cent and lowering the cost of hydrogen production.
Our technology solves one of the industry’s most persistent challenges - gas bubbles - and enables efficiency levels that could make green hydrogen commercially viable at scale,
said Juri Volodin, founder and CEO of Spiral Hydrogen.
The new funding will support the transition from laboratory development to pilot deployment. The company plans to build its first pilot electrolyser at the Port of Rotterdam in partnership with SwitcH2, with completion expected within the next two years. The pilot is intended to validate the technology under real-world industrial conditions and inform the development of a first commercial unit.
By improving efficiency and reducing both capital and operating costs, Spiral Hydrogen aims to make green hydrogen competitive with fossil-based alternatives, supporting decarbonisation across sectors such as refining, fertilisers, steel, and heavy transport.
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