Proofpoint Acquires Nuclei

Proofpoint Acquires Acuvity to Secure the Agentic Workspace

February 12, 2026

Cybersecurity

Proofpoint, Inc. announced it has acquired Acuvity, an AI enterprise security and governance platform, to expand human- and agent-centric cybersecurity capabilities. The combined offering is intended to provide AI-native visibility, governance, and runtime protection for AI and agent-driven workflows.

Proofpoint to Acquire Hornetsecurity Group to Expand Global M365 Cybersecurity for MSPs

May 15, 2025

Cybersecurity

Proofpoint, Inc. entered into a definitive agreement to acquire Hornetsecurity Group, a pan-European provider of AI-powered Microsoft 365 security, data protection, compliance, and security awareness services. The deal is intended to enhance Proofpoint’s ability to deliver human-centric security to small and mid-sized businesses globally through managed service providers (MSPs).

Proofpoint Acquires InteliSecure for $62.5M

February 22, 2021

Cybersecurity

Proofpoint, Inc. agreed to acquire InteliSecure, a data-loss-protection managed services provider, for $62.5 million in cash. The acquisition (expected to close in Q1 2021) adds roughly 150 employees and strengthens Proofpoint’s people-centric cloud-based DLP and managed security services; InteliSecure was sold by investor Frontier Growth.

Thoma Bravo Acquires Proofpoint for Approximately $12.3 Billion

August 31, 2021

Cybersecurity

Thoma Bravo entered into a definitive agreement to acquire Proofpoint, a cybersecurity and compliance software company, in an all-cash transaction valued at approximately $12.3 billion. The acquisition was completed in 2021, with Proofpoint stockholders receiving $176.00 per share.

Proofpoint Acquires Dathena

January 10, 2022

Cybersecurity

Proofpoint has completed the acquisition of Dathena, an AI-powered data discovery and classification specialist, to enhance its Information & Cloud Security and people-centric DLP offerings. The deal integrates Dathena's AI-driven data classification capabilities into Proofpoint's cloud platform, expanding its data protection capabilities and strengthening its presence in Asia.

Proofpoint Acquires Tessian

December 19, 2023

Cybersecurity

Proofpoint, Inc. has completed the acquisition of Tessian, a provider of AI-powered behavioral email security and data loss prevention. The deal integrates Tessian's machine-learning detection for misdirected emails and data exfiltration into Proofpoint's threat and information protection platform to expand its AI-driven defenses across email, cloud, and endpoints.