Butterfly Network, Inc. is a US medical device company that develops handheld whole-body ultrasound systems built on a semiconductor chip rather than traditional piezoelectric crystals, founded in 2011 by Dr. Jonathan Rothberg in Guilford, Connecticut. The company’s probes use a single transducer to perform cardiac, abdominal, and superficial-structure imaging modes. Butterfly Network is publicly traded on the NYSE under the ticker BFLY.