Proofpoint, Inc. × Hornetsecurity Group
Proofpoint entered a definitive agreement to acquire Hornetsecurity on May 15, 2025, and completed the transaction on December 8, 2025. While early reports estimated the price around $1 billion, the final acquisition price was confirmed to be $1.8 billion. The acquisition combines Proofpoint's enterprise focus with Hornetsecurity's expertise in serving small businesses and managed service providers (MSPs).
The asset
An AI-powered Microsoft 365 security, data protection, compliance, and security awareness service provider.
- 160M Annual Recurring Revenue (ARR)
The record
- Seller status
- Going concern
- Sector
- Cloud email security
- Modalities
- email_data, metadata, threat_intelligence
- Jurisdiction
- EU
What it means if you hold data
This acquisition demonstrates the high value placed on email threat data and the AI models that analyze it. By integrating Hornetsecurity's platform, which processes vast amounts of M365 data, Proofpoint expands its threat intelligence corpus, enhancing its ability to protect against targeted cyberattacks and secure data for a wider range of customers.