Xonotiv

Xonotiv is a privately-held, bootstrapped startup based in San Diego, founded in 2015, that has developed a unique passive mechanical prosthetic knee. The device is designed to offer the stability benefits of expensive microprocessor-controlled knees at a fraction of the cost and with higher reliability, targeting the significant amputee population. The company plans to first commercialize the knee for amputees and later adapt the technology for use in robotic and exoskeleton platforms across various markets. Its strategy leverages existing Medicare reimbursement codes and its status as a Class I medical device to streamline market entry.

A passive mechanical joint platform that provides load-responsive stability. The core mechanism swings freely when unweighted but automatically prevents flexion (buckling) under load, enabling stable gait without electronics, hydraulics, or power.

Xonotiv competes in the prosthetic knee market against dominant players like Össur and Ottobock, who offer a range from basic mechanical joints to advanced microprocessor knees (MPKs). Its direct competitors are traditional single-axis and polycentric mechanical knees (lower functionality, lower cost) and high-end MPKs (higher functionality, much higher cost). Xonotiv's unique value proposition is offering MPK-like stability passively and mechanically, aiming to create a new 'value-stability' niche.