Exo is a US medical device company that develops handheld ultrasound systems using piezoelectric micromachined ultrasonic transducer (pMUT) technology, founded in 2015 in Redwood City, California. The company integrates ultrasound imaging hardware with AI-assisted clinical software for point-of-care settings. As of 2024, Exo had raised more than $400 million in venture funding toward commercializing its platform.