Islam is a religion that proselytizes (attempt to convert followers). What are some other

religions which do this?

Another proselytizing religion is Christianity (both Catholicism and Protestantism are proselytizing). Islam and Christianity are both monotheistic and claim to be the true religion. Some sources include Sikhism among the proselytizing religions, though another sources say Sikhs teach by example and don't necessarily proselytize.