Doppel Secures $35M Series B to Expand AI-Powered Social Engineering Defense Platform

Doppel, a cybersecurity company focused on social engineering defense, has closed a $35 million Series B funding round, bringing its total funding to $54.4 million. The round was led by Bessemer Venture Partners and includes new investors 9Yards Capital and Sozo Ventures, alongside returning backers such as a16z and Strategic Cyber Ventures. The funding values the company at $205 million.

The investment follows a year of rapid enterprise traction since Doppel’s Series A in January 2024. The company reports a 400% increase in enterprise clients and tripling of annual recurring revenue. Demand for Doppel’s AI-driven platform—designed to detect and dismantle impersonation threats across email, social media, web domains, and mobile applications—has grown significantly as organizations seek more proactive digital risk protection.

Doppel’s platform combines large language models with expert analyst oversight to detect and neutralize social engineering threats. It maps attacker infrastructure, enabling takedown efforts at the source, and provides centralized threat intelligence through its Doppel Vision interface. The company says its AI agent, trained on thousands of analyst-led decisions, has doubled the operational efficiency of its threat response team.

With new capital, Doppel plans to scale its product development, enhance automation capabilities, and meet growing customer demand across sectors. The company is also continuing its collaboration with OpenAI to improve autonomous threat detection and mitigation across complex digital environments.