Spiral Hydrogen raises €3.4M to build green hydrogen pilot in Rotterdam

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 hydro