EnduroSat AD is a Bulgarian aerospace manufacturer headquartered in Sofia.[1][2][3][4][5] It was founded in 2015 by Raycho Raychev. The company designs, builds, and operates CubeSats and Nanosatellites for commercial and scientific missions and is developing inter-satellite linking and data applications. EnduroSat was nominated as one of the top 5 small satellite start-ups.[6] EnduroSat is a member of the International Astronautical Federation (IAF)[7]