Abnormal Security

Founded in 2018 and based in San Francisco, Abnormal Security offers an AI-native platform that models user behavior to catch inbound email attacks and compromised accounts across connected apps. Customers are mainly large enterprises, and the platform connects to existing email systems through an API on a recurring fee. Its total funding reached $534M across rounds, including a $250M Series D in August 2024 at a reported $5.1B valuation. Third-party estimates put 2024 revenue near $200M and the customer count around 2,400, though these figures are unaudited.