Doppel

Doppel is an AI-native cybersecurity company founded in 2022 and headquartered in San Francisco, California. The company focuses on social engineering defense, helping organizations protect individuals, brands, executives, and employees from AI-powered impersonation, phishing, fraud, and related digital threats. Its platform combines Digital Risk Protection, Human Risk Management, and Email Security through a shared threat intelligence layer called the Doppel Threat Graph.

The system is designed to detect threats across multiple digital channels, connect related activity, disrupt attacker infrastructure, and turn real-world threats into phishing simulations and security-awareness training. Doppel also provides email protection designed to detect and respond to threats while helping organizations close detection gaps. The company has raised $124 million through its publicly reported Series C as of November 2025 and continues to expand its platform and international operations.