Abnormal Security provides AI-native email and cloud security solutions that protect against phishing, social engineering, and account takeover attacks. The company was founded in 2018 by former advertising technology professionals who applied their AI expertise to cybersecurity. The platform connects via API to analyze thousands of signals from multiple data sources, establishing behavioral baselines for users and detecting anomalous activity. The Abnormal Behavior Platform delivers email security for Microsoft 365 and Google Workspace, as well as multi-platform defense for cloud infrastructure and SaaS applications including Workday, Salesforce, ServiceNow, Slack, and Amazon Web Services. The system uses autonomous AI models to detect and prevent attacks by understanding human behavior patterns and identifying deviations that indicate threats. The company protects over 20 million people across more than 3,000 organizations, including 17% of the Fortune 500. Abnormal Security operates globally with presence in North America, Europe, Asia, and Australia. The platform automates threat detection and response, reducing manual security operations workload. The company surpassed $200 million in annual recurring revenue within five years of founding and has raised $546 million in total funding at a $5.1 billion valuation.