Cabaletta Bio, Inc. operates as a clinical-stage biotechnology company, which engages in the discovery and development of engineered T cell therapies for B cell-mediated autoimmune diseases. Its proprietary technology utilizes chimeric autoantibody receptor to selectively bind and eliminate B cells that produce disease-causing autoantibodies. The company was founded by Michael C. Milone, Steven Nichtberger, and Aimee Payne in April 2017 and is headquartered in Philadelphia, PA.