WPP vs PSN Comparison

Headquartered in the United Kingdom, WPP is the world's largest ad holding company based on annual revenue. Its services, which include traditional and digital advertising, public relations, and consulting, are provided worldwide, with over 70% of its revenue coming from more developed regions such as North America, the UK, and Western Europe. WPP is the largest media buying entity in the world.

Parsons Corp is a provider of technology-driven solutions in the defense, intelligence, and critical infrastructure markets. The business activities of the group are carried out through Federal Solutions and Critical Infrastructure segments. The Federal Solutions segment is a high-end service and technology provider to the U.S. government, delivering timely, cost-effective solutions for mission-critical projects, whereas the Critical Infrastructure segment provides integrated design and engineering services for complex physical and digital infrastructure around the globe.