EnduroSat

EnduroSat is a Bulgarian aerospace company founded in 2015 and headquartered in Sofia. The company engineers, builds, and operates CubeSats, nanosatellites, and ESPA-class small satellites for commercial and scientific customers. EnduroSat pioneered its Shared Satellite platform model, allowing multiple customers to fly payloads on a single spacecraft, reducing cost and time to orbit. The company serves over 350 customers globally across more than 12 countries.

EnduroSat offers satellite platforms (6U, 8U, 16U CubeSats and the FRAME ESPA-class satellite), communication subsystems, onboard computers, power modules, solar panels, and structures. The company is developing inter-satellite linking and data marketplace capabilities, positioning itself as a space-as-a-service provider. In 2025, EnduroSat opened a Space Centre in Sofia with advanced RF labs, clean rooms, and full space qualification facilities. The company launched Bulgaria's first CubeSat (EnduroSat One) in 2018 and has completed missions for customers including Foxconn, IBM, Sateliot, and the Kenyan Space Agency.