Kol Echad, otherwise known as simply "KE," is Boston University's multicultural, multi-genre A Cappella Group, founded as a Jewish group in 1995. As their name implies, they aim to deliver a musical experience that embraces a mix of styles and cultures within the ever-popular collegiate a cappella sound.

The group is a mainstay throughout the Northeast and often sings at universities including Harvard, Brandeis, Rutgers, and Tufts. Once a year, Kol Echad takes a week-long tour, bringing A Cappella to locations such as Toronto, Arizona, Miami, Chicago, and Los Angeles. In 2022, the group also had the opportunity to compete in the ICCA Northeast Quarterfinals.