Advent Technologies Holdings, Inc. develops, manufactures, and distributes high-temperature proton exchange membrane (PEM) fuel cells. It offers HT-PEM fuel cells, fuel cell materials (MEAS), flow battery membranes, and organic photovoltaics (OPV). The company serves automotive, aviation, and power generation markets. Its technology allows the conversion of methanol, natural gas, DME, biomass, etc. to electricity bypassing the need for hydrogen infrastructure. Its products are used for automotive, aviation, drone, portable, marine, off-grid power, combined heat and power, high-temperature electrolysis, and other applications. The company was founded in 2006 and is headquartered in Cambridge, Massachusetts.