HNO International, Inc. focuses on systems engineering design, integration, and product development to generate green hydrogen-based clean energy solutions in the United States. The company offers hydrogen refueling and generation systems for fuel cell electric vehicles, such as forklifts, drones, cars, and trucks, as well as for zero-emission heating and cooking applications; and green hydrogen systems engineering design, integration, and products to the zero-emission vehicle and mobile equipment market consisting of hydrogen fuel cell electric passenger vehicles, material handling equipment, and forklifts and airport ground support equipment, as well as the medium and heavy-duty truck market; ammonia, fertilizer, steel, mining, electronics, semiconductors, and fuel cell electric vehicles; and the gasoline and diesel engine emissions and maintenance reduction product and services market. It also provides custom hydrogen carbon cleaning equipment for engine service providers; hydrogen for internal combustion engine; compact hydrogen refueling system that delivers modular, compact green hydrogen refueling stations; and scalable hydrogen energy platform, a modular hydrogen energy system. The company was formerly known as Excoin Ltd and changed its name to HNO International, Inc. in September 2021. HNO International, Inc. is based in Murrieta, California.