Leader: Wipro

India-based Wipro has agents across the U.S., Canada, Mexico, India and the Philippines, according to Gartner. Wipro also provides on-site desktop services through an estimated 700 desktop technicians. It handles over 9.5 million service desk contacts in North America, including some 900,000 users, Gartner estimates. Wipro's focus on innovation and digital transformation for its clients is backed by its investments in research and innovation, Gartner said.