Proofpoint announced that it has agreed to acquire Varonis, a company specializing in data security and artificial intelligence, in an all-cash deal valued at approximately $6.3 billion. The deal is the largest announced acquisition in the cybersecurity sector during 2026 so far, reflecting growing interest among security companies in combining data protection with controls for the use of artificial intelligence systems.
Varonis shareholders will receive $49.75 per share, a 52% premium over the closing price of $32.71 on June 22, 2026, the last full trading day before reports emerged about a possible sale of the company. The deal is expected to close during the first half of 2027. Proofpoint and Varonis will continue operating as independent companies until closing, after which Varonis will become a private company.
What Does Varonis Add?
Varonis provides a software-as-a-service platform for data security that identifies and classifies sensitive data across cloud environments, SaaS systems, and on-premises infrastructure. It also maps the entities that have permission to access the data and monitors how it is used.
The Atlas platform covers artificial intelligence systems built or used by organizations through artificial intelligence system inventories, posture management, testing, runtime controls, and compliance reporting. Varonis also offers products for email and browser security, as well as a managed service for detecting and responding to data threats.
A Unified Platform for Data and Artificial Intelligence Security
After the deal closes, Proofpoint plans to combine the two companies’ capabilities in a unified platform for data and artificial intelligence security. Proofpoint’s current portfolio includes email protection against phishing, business email compromise, ransomware, and malware, along with protection for messaging applications and cloud accounts.
The company also provides tools for preventing data loss, managing insider risk, and managing data security posture. This year, it launched a product called AI Security to control how employees and artificial intelligence agents use tools and to monitor actions that deviate from a user’s request or an organization’s policies.
Deal Context and Open Questions
Thoma Bravo owns Proofpoint and provided committed equity financing, while Proofpoint secured debt financing commitments to complete the acquisition. Ontario Teachers’ Pension Plan is also investing in Proofpoint as part of the deal.
The transaction follows other moves in the same field. In February, Proofpoint acquired Acuvity, a company specializing in artificial intelligence security and governance, while Varonis announced during the same period that it would acquire AllTrue.ai, a provider of artificial intelligence trust, risk, and security management solutions, for $150 million.
In practical terms, the deal seeks to bring communications, identity, and data protection together with artificial intelligence system monitoring in a single offering. However, the impact of this integration will not become clear until the deal closes and product integration begins, and the two companies will remain separate during the transition period. SecurityWeek has tracked more than 300 cybersecurity mergers and acquisitions during 2026.