Kaleido Biosciences, Inc., a clinical-stage healthcare company, develops microbiome metabolic therapies. The company develops KB195 for the treatment of patients with urea cycle disorder; KB295 to treat ulcerative colitis; KB174 for the treatment of hepatic encephalopathy; and KB109 to treat COVID-19 disease. It also develops programs for the treatment of immuno-oncology, and cardiometabolic and liver diseases. The company has collaboration agreements with Gustave Roussy Cancer Center, Washington University School of Medicine, and Janssen. The company was incorporated in 2015 and is headquartered in Lexington, Massachusetts.