Abnormal Security

Abnormal Security is an AI-native email security platform that protects enterprises against sophisticated email attacks including business email compromise (BEC), phishing, account takeover, and social engineering. Unlike traditional email security that relies on threat signatures, Abnormal uses behavioral AI to understand normal communication patterns and detect anomalies.

The company's AI builds profiles of every employee, vendor, and partner in an organization, learning their writing style, communication patterns, and business relationships. When an email deviates from established patterns — for example, a fake invoice from a compromised vendor account — Abnormal's AI detects and blocks it before it reaches the recipient.

Abnormal has grown rapidly, surpassing $200 million in annual recurring revenue and serving over 2,000 enterprise customers. The company's API-based architecture integrates directly with Microsoft 365 and Google Workspace, providing a seamless layer of AI protection without requiring changes to email infrastructure.