The EnduroSat Onboard Computer (OBC) is powered by an ARM Cortex M4/M7 processor with frequency rates of up to 180 MHz for M4 and 216 MHz for M7. Featuring high power and low mass, with a 2MB program memory size (256kB RAM for M4, 2MB RAM for M7; 2048kB flash memory). The 58g device features a wide array of connectors and integrated sensors as well as a ProtoBoard that enables rapid payload integration by simplifying access to main power and communication busses. The OBC is fully compliant with the CubeSat standard and has flight heritage.