Proofpoint to Acquire Hornetsecurity for Over $1 Billion, Expanding AI-Powered Microsoft 365 Security

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Cybersecurity firm Proofpoint announces plans to acquire Hornetsecurity, a German AI-powered Microsoft 365 security provider, for over $1 billion. The deal aims to enhance Proofpoint's human-centric security offerings for small and mid-sized businesses globally.

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Proofpoint's Strategic Acquisition of Hornetsecurity

Cybersecurity firm Proofpoint Inc. has announced a definitive agreement to acquire Hornetsecurity GmbH, a German provider of AI-powered Microsoft 365 security solutions, in a deal reportedly valued at over $1 billion

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. This strategic move is set to expand Proofpoint's capabilities in threat protection, particularly for small and mid-sized businesses (SMBs) globally

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Hornetsecurity's Offerings and Market Position

Founded in 2007, Hornetsecurity has established itself as a leading pan-European security provider with its flagship product, 365 Total Protection. This suite offers comprehensive security for Microsoft 365 users, protecting against threats such as spam, phishing, malware, and ransomware

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. The company's portfolio also includes:

  1. Advanced AI-powered threat detection
  2. Email encryption and compliance filtering
  3. Email continuity and archiving solutions
  4. 365 Total Backup for Microsoft 365 data recovery

Hornetsecurity serves over 12,000 channel partners and managed service providers (MSPs), catering to more than 125,000 SMBs across Europe. The company boasts an impressive annual recurring revenue of over $160 million, with a growth rate exceeding 20% year-over-year

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Strategic Benefits for Proofpoint

The acquisition of Hornetsecurity aligns with Proofpoint's strategy to enhance its human-centric security platform. Key benefits include:

  1. Expanded reach into the SMB market through MSPs
  2. Strengthened presence in European markets
  3. Enhanced AI-powered security capabilities for Microsoft 365
  4. Improved ability to protect organizations' people and data

Sumit Dhawan, CEO of Proofpoint, emphasized the importance of this acquisition in addressing sophisticated attacks targeting people across various digital channels

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Integration and Future Plans

Upon closing the deal, expected in the second half of 2025, Proofpoint plans to make Hornetsecurity's platform available to MSPs and their customers worldwide

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. Daniel Hoffman, Hornetsecurity's founder and CEO, will continue to lead the company, with the existing management team remaining in place

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Industry Trends and Market Context

This acquisition follows a trend of significant cybersecurity deals in 2025, including Google's planned $32 billion acquisition of Wiz Inc. and Palo Alto Networks' purchase of Protect AI Inc. for over $500 million

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. The move also reflects the growing adoption of AI-driven cybersecurity solutions, with a recent report indicating a substantial increase in the implementation of AI-powered automated cybersecurity management systems among chief operating officers

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Conclusion

Proofpoint's acquisition of Hornetsecurity represents a significant development in the cybersecurity landscape, particularly for Microsoft 365 users. As organizations continue to face evolving threats, this merger aims to provide enhanced protection for businesses of all sizes, leveraging AI and human-centric security approaches to safeguard digital assets and communications.

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