Funding/M&A Proofpoint Completes $1.8 Billion Acquisition of Hornetsecurity Proofpoint said Hornetsecurity brings in nearly $200 million in annual recurring revenue, with a 20% year-over-year growth rate. Eduard KovacsDecember 9, 2025
M&A Tracker Proofpoint to Acquire Hornetsecurity in Reported $1 Billion Deal Enterprise cybersecurity giant Proofpoint is buying Germany-based Microsoft 365 security solutions provider Hornetsecurity. Eduard KovacsMay 15, 2025