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. It also has a strategic collaboration with the COPD Foundation to study KB109 in patients with chronic obstructive pulmonary disease. The company was incorporated in 2015 and is headquartered in Lexington, Massachusetts.