Most of biotech chases the diseases you can see. Thymmune went after the organ almost no one thinks about - the thymus - and built a way to grow it from stem cells.
ATDev (Assistive Technology Development, Inc.) is a UC Berkeley spinout building an ecosystem of robotic devices that help people stay independent. Its flagship product, Reflex, is a smart, under-5-pound robotic knee brace that delivers personalized, telehealth-enabled physical therapy at home and streams progress data back to clinicians. Founded by engineer Todd Roberts and disability-rights advocate Owen Kent, the company designs 'for users, by users' and is scaling after a $3M seed round while also serving as a subcontractor on a $41M ARPA-H robotic mobility program.