Proofpoint acquires Acuvity to tackle the security risks of agentic AI

Proofpoint acquired Acuvity to enhance enterprise visibility and governance over AI usage, including monitoring interactions with external AI services and securing custom models across environments like browsers, MCP servers, and local tools. The move targets emerging AI-specific threats such as prompt injection and model manipulation while enabling CISOs to maintain governance amid rapid AI adoption; it also complements Proofpoint’s Hornetsecurity offerings and aligns with an industry trend of larger security vendors acquiring AI-focused startups (e.g., Varonis’ purchase of AllTrue.ai).