Proofpoint is an American cybersecurity company, headquartered in Sunnyvale, California, USA, that provides email security, threat protection, and compliance solutions globally, with major offices and operations across the U.S., Europe (Ireland, UK, France, Germany, etc.), and Asia-Pacific (Australia, Singapore, Japan, India, etc.). While US-based, it's a global entity with significant international presence and investments, including recent expansions in Ireland, UAE, and Saudi Arabia.