Gallup helps its clients grow from the inside out. Unlike other consulting firms, it says, which provide services in traditional disciplines like cost reduction and re-engineering business processes, the Washington, D.C.-based firm focuses on "true organic growth," driving revenue and increasing profits from continuing operations. Gallup uses its research into human nature to determine how human behavior and relationships drive organizations. "Organizations can grow," the firm posits, by developing engaged customers and building engaged workforces of talented employees.

Following that philosophy, the firm's strategic consultants deliver relevant, timely, and—the firm says—visionary research on what people around the world think and feel. Through two practice areas, workplace, and customer practices, Gallup o...