Proofpoint agreed Thursday to acquire Varonis Systems in a cash transaction valued at approximately $6.3 billion, combining two companies that have positioned themselves around a shared bet: that securing data has become the central problem of the AI era.
The acquisition pairs two distinct approaches to security. Varonis specializes in data security, mapping where sensitive information sits inside an organization, who can reach it, and how it is actually used. Proofpoint, owned by private equity company Thoma Bravo, built its business around protecting people, blocking phishing, fraud and other attacks that arrive primarily through email and target employees rather than machines.
Sumit Dhawan, Proofpoint’s CEO, wrote in a blog post Wednesday that AI is changing the security equation on two fronts. Outside the enterprise, attackers are using AI to launch faster and more advanced campaigns aimed at data and critical systems. Inside, companies are deploying AI agents that have wide-ranging access to sensitive information, creating new categories of insider risk.
“Data Security — protecting data from compromise, loss, and misuse by people or AI agents — has become the defining priority for organizations seeking to realize AI’s full potential,” Dhawan wrote.
The companies frame the deal as a response to that dual pressure. In a joint announcement, they said the combined organization would serve millions of organizations globally, and described plans for helping organizations adopt and secure AI.
Proofpoint’s global reach, he wrote, includes 3.4 million customers, 2.37 trillion emails scanned annually, 410 billion data security events ingested, and more than 13,000 sensors across 105 countries. Those signals feed what the company calls its Knowledge Graph, which strengthens its AI models with intelligence on threats, human behavior and data risk. Combined with Varonis’ visibility into sensitive data, the companies envision a foundation for discovering and remediating risks at machine speed.