Doppel was founded in 2022 by Kevin Tian and Rahul Madduluri, who met at Uber in 2016 and originally built the company to protect crypto firms from impersonation scams. As generative AI made impersonation, phishing, and deepfake attacks dramatically cheaper and more convincing, Doppel expanded into a broad platform for defending against modern social engineering, the threat category behind a large share of real-world breaches.
The platform continuously scans the open internet and harder-to-reach corners of the web, including domains, social media, paid ads, mobile app stores, messaging platforms, and the dark web, to find impersonations of a company's brand, executives, and products. When Doppel detects malicious lookalike domains, fake profiles, fraudulent apps, or phishing infrastructure, it moves to dismantle that infrastructure through automated and managed takedown workflows, shrinking the window in which an attack can succeed.
Beyond detection and takedown, Doppel emphasizes resilience. It uses adaptive training and simulation, including deepfake and social-engineering scenarios, to prepare employees and executives for the kinds of attacks they are most likely to face. The AI-native design lets the system adapt to attacker behavior in real time rather than relying purely on static signatures or blocklists.
In November 2025, Doppel raised a $70 million Series C led by Bessemer Venture Partners at a valuation above $600 million, roughly six months after its Series B. The round drew a notable roster of backers, including CrowdStrike CEO George Kurtz, NTT DOCOMO Ventures, Aurum Partners, and a group of WNBA athlete investors through the a16z Cultural Leadership Fund, with returning investors Andreessen Horowitz, South Park Commons, Script Capital, 9Yards Capital, Sozo Ventures, and Strategic Cyber Ventures. Doppel positions itself as the system of record for social engineering defense as AI reshapes how attackers impersonate trusted brands and people.