Quaise Energy is a geothermal energy company that develops drilling technology and geothermal power systems for accessing superhot geothermal resources deep beneath the Earth's surface. Its core technology uses high-power millimeter waves generated by a surface-based gyrotron to vaporize and remove rock without relying on conventional downhole drilling equipment. The company combines conventional rotary drilling for shallower sections with millimeter wave drilling to reach deeper, hotter rock formations.