Abnormal Security

Abnormal Security, founded in 2018 by Evan Marckoff and Tal Be'ery, is a San Francisco-based cybersecurity company specializing in email and cloud threat detection. Using behavioral AI and machine learning, the company identifies advanced threats including business email compromise, phishing, ransomware, and account takeover attacks. Unlike traditional security approaches that rely on known signatures and rules, Abnormal Security's platform analyzes user behavior patterns and organizational context to detect anomalies and threats that conventional security tools miss. As a well-funded private company, Abnormal Security helps enterprise organizations protect their most critical communication channels from increasingly sophisticated email-based attacks, a category of threat that consistently ranks among the highest-impact and highest-frequency attack vectors.