Proofpoint Adaptive Email Security vs. KnowBe4 Email & Collaboration Security

The Tessian Cloud Email Security Platform intelligently protects against advanced threats and data loss on email, while reducing security teams' workloads, and coaching people about security threats in the moment. Using Behavioral Intelligence Modeling and machine learning, Tessian automatically detects and prevents threats that legacy Secure Email Gateways fail to stop, including advanced phishing attacks, email impersonation, accidental data loss and insider threats. We ensure security teams can work smarter, not harder.

KnowBe4 Email & Collaboration Security is the AI-native defense suite built to protect every conversation across Microsoft 365 and Google Workspace. Combining multi-engine behavioral AI with real-time user coaching, the platform stops inbound threats, prevents outbound data loss, and automates SOC response across the security lifecycle. Key Capabilities: - Inbound Protection (Defend): Multi-engine AI blocks zero-payload BEC, executive impersonation, quishing, and prompt injections that pass native mail filters.