Proofpoint

Computer and Network SecurityCalifornia, United States5001-10000 Employees

Proofpoint is a computer and network security company based in Sunnyvale, California, focused on protecting how people, data and AI agents connect across email, cloud, and collaboration tools. Its offerings combine cybersecurity with compliance to govern and secure digital communications for enterprise environments. The company’s digital communications governance solution is deployed by six of the top 10 financial services firms in the United States, per Fortune 100 rankings. 

The firm has pursued acquisitions and partnerships to expand its AI-driven security capabilities, including the 2023 closing of its Tessian acquisition to bolster AI-based data loss prevention and email threat protection. In 2025 it announced the general availability of its Satori Emerging Threats Intelligence Agent for Microsoft Security Copilot and joined the Microsoft Security Store Partner Ecosystem, reflecting integration with AI-enabled security ecosystems. In 2026 it disclosed the acquisition of Acuvity to add agentic workspace protection to its cybersecurity platform.

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