ArmAssist (AA), developed by TECNALIA, is a telerehabilitation platform aiming to help poststroke subjects maintain the rehabilitation of the upper limb at home. AA includes robotic modules with multiple sensors to train and measure the users’ voluntary movements. An assessment platform based on serious games is also included to not only engage the user but also perform automated evaluations of arm and hand function and their evolution over time. Moreover, AA facilitates at-home rehabilitation with limited remote supervision by the therapist. In the present article, the technical specifications and developments of AA are described. Additionally, a summary of the outcomes of a usability evaluation of AA is presented.