Dioxycle develops a proprietary electrolyzer that converts carbon dioxide or monoxide, water, and renewable electricity into ethylene, a key chemical for plastics, textiles, packaging, and construction materials. The modular, multi-stacked plate design optimizes ion transport, gas flow, and product selectivity for scalable production of ethylene and other molecules like syngas and formic acid. Customers include L'Oréal Groupe via a multi-year partnership, with applications in mining, energy infrastructure, pharmaceuticals, agriculture, and consumer goods sectors. Cofounders Sarah Lamaison (CEO) and David Wakerley (CTO) lead the company. It raised $17 million in a 2023 Series A round led by Lowercarbon Capital, Breakthrough Energy Ventures Europe, and Gigascale Capital, contributing to a total of $40 million from those investors. Headquartered in Paris, Dioxycle operates sites in France and San Francisco, California. The company advanced from lab trials to its first prototype in 2022 and holds 13 patent families from prior research.