AI-driven social engineering defense platform Doppel has raised $70 million in a Series C funding round led by Bessemer Venture Partners. The funding round, announced on November 19, also saw participation from George Kurtz, NTT DOCOMO Ventures, a16z, and other investors. Doppel plans to use the funds to advance its digital protection infrastructure, which combines generative AI with expert human analysis to safeguard organizations against phishing, impersonation, and deepfake fraud.