Proofpoint
Sunnyvale, CA, USA · Founded 2002
Email, data, and human-risk security vendor spanning threat protection, data loss prevention, and security awareness training; taken private by Thoma Bravo in a $12.3B 2021 deal and still PE-owned as of mid-2026.
Verified Source: 1
Notable acquisitions
Proofpoint’s acquisition history, in chronological order.
- 2025Hornetsecurity
Portfolio
Tools by Proofpoint cataloged in the stack.