2seventy bio, Inc., a cell and gene therapy company, focuses on the research, development, and commercialization of treatments for cancer in the United States.

The company's products pipeline includes idecabtagene vicleucel; ide-cel or Abecma and bb21217; and chimeric antigen receptor-T cell product candidates for the treatment of multiple myeloma.

It has a collaboration arrangement with Bristol-Myers Squibb Company. The company was incorporated in 2021 and is headquartered in Cambridge, Massachusetts.