Doppel is an AI-native security platform for social engineering defense. It protects brands, executives, and employees from AI-powered impersonation, phishing, and fraud by detecting threats across social media, domains, marketplaces, and the dark web, correlating attack signals into a unified Threat Graph, and automating takedowns of attacker infrastructure. Founded in 2022 by Kevin Tian and Rahul Madduluri, the company analyzes over a billion indicators daily and protects dozens of Fortune 500 brands.
Alastair 'Alex' Rampell is a General Partner at Andreessen Horowitz (a16z), where he leads the firm's $1 billion Apps practice with a focus on fintech, payments, and B2B/B2C software. A serial entrepreneur who started selling shareware at age 10, Alex co-founded seven startups before joining a16z in 2015, including TrialPay (acquired by Visa for $116M), FraudEliminator (acquired by McAfee for $75M), Affirm (NASDAQ:AFRM co-founded with Max Levchin), and TXN (acquired by Envestnet). His rare combination of operator experience, deep financial services expertise, and fluency in Russian and Japanese makes him one of the most distinctive investors in Silicon Valley.