pem-electrolyzer
(2)Daniel Sobek
Daniel Sobek is the co-founder and CEO of 1s1 Energy, a Portola Valley startup turning a chunk of boron chemistry into cheaper, cleaner green hydrogen. An MIT-trained engineer with three degrees from the institute and a habit of starting companies, he spent years in microfluidics and cancer-imaging hardware before betting on electrolyzers. His company's boron-based membranes claim to cut the energy needed to make hydrogen by about 30 percent, and he says they already hit a U.S. Department of Energy efficiency target set for 2031.
Siva Yellamraju
Siva Yellamraju is the co-founder and CEO of Fourier, a Palo Alto hydrogen startup building modular, software-controlled electrolyzers no bigger than two server racks. A four-time founder whose previous companies were acquired by Apple, Google, and Polycom, he spent a career in cameras and video before turning a 10-15% side exploration into a clean-energy company. Fourier treats hydrogen production as a data-optimization problem, aiming to deliver on-site hydrogen at $6-7/kg. The company raised an $18.5M Series A led by General Catalyst and Paramark Ventures in April 2025.