Sensei Biotherapeutics is a biopharmaceutical company that focuses on immunotherapies for cancer treatment using its proprietary ImmunoPhage and Tumor Microenvironment Activated Biologics. The company is also working on developing monoclonal antibodies and vaccines to target tumor antigens. Sensei Biotherapeutics collaborates with The University of Washington for the research and development of a Merkel cell carcinoma vaccine.