French startup to develop rice-sized robot that could change brain tumor treatment

French startup Robeauté has secured €27 million ($29 million) to develop a microrobot designed for minimally invasive brain surgery. Roughly the size of a grain of rice, the device is engineered to navigate the brain with precision, avoiding sensitive areas responsible for motor and cognitive functions.

Unlike traditional tools that follow straight paths, the microrobot moves along curved routes using rotating silicone rings, minimizing tissue damage. Real-time monitoring is achieved through ultrasound and imaging systems mounted on the skull.

The robot can collect brain tumor tissue samples using miniature instruments housed within its body, with routes planned through AI and MRI scans. Preclinical trials on animals showed promising safety results.

Clinical trials are expected to begin in 2026, with Robeauté aiming for FDA approval and international release by 2030. The company says the device could transform neurosurgery, allowing access to previously unreachable brain regions and enabling less invasive treatment options.