BY CHARLES ONYANGO-OBBO

As ride-hailing apps proliferate the globe, the year-old An Nisa Taxi in Kenya is one of the standouts in Africa. Developed by 33-year-old Mehnaz Sarwar, An Nisa is run by women and serves female passengers and children exclusively. Ms. Sarwar sought to overcome two obstacles: limited job opportunities for women in a male-dominated industry and the reluctance of women to hail taxis, because physical abuse from drivers—including sexual abuse—is known to take place.