Doppel is an AI-native platform founded in 2022 that specializes in social engineering defense. The company protects individuals and brands from AI-powered impersonation, phishing, fraud, and social engineering attacks by dismantling attacker infrastructure and building resilience through training and simulation. The platform provides comprehensive Digital Risk Protection that detects threats across multiple channels and links alerts into a real-time threat graph. Doppel offers AI-driven infrastructure disruption capabilities to take down malicious assets. The company's multi-channel threat graph powers enterprise brand protection and executive protection services. Doppel combines threat detection with Human Risk Management capabilities, using identified threats to inform phishing simulation campaigns and security awareness training. This approach strengthens employee defenses through training and testing programs designed to build organizational resilience against social engineering tactics. The company is backed by Andreessen Horowitz (a16z), Bessemer Venture Partners, Amex Ventures, and CrowdStrike CEO George Kurtz, among other investors. Doppel serves customers including OpenAI, Notion, Klaviyo, United Airlines, Tripadvisor, and Ramp. The platform is designed to make businesses too costly for attackers to target by learning from every attack and expanding its reach across digital channels.