Based in Austin, TX, Reebeez is developing an efficient thermophotovoltaic microengine for drones that achieves unrivaled flight times and payloads, and is cheaper and more powerful than lithium polymer (LiPo) batteries. With the UAS global market at $11.3B, drones are crucial to endeavors like surveillance, retail distribution, and medicine transportation. Our propulsion system performs 8x better than LiPo batteries at a third of the cost.