Doppel's AI Arms Race: $70M to Outpace Cyber Threats

Doppel, an AI-native social engineering defense (SED) platform, has completed a $70 million Series C funding round, led by Bessemer Venture Partners, bringing its total capital raised to $124 million and valuation to over $600 million according to company announcements. The round, announced November 19, 2025, includes new investors such as CrowdStrike CEO George Kurtz, NTT DOCOMO Ventures, and WNBA stars Nneka Ogwumike, Breanna Stewart, and Kelsey Plum, alongside returning backers like Andreessen Horowitz and Sozo Ventures as reported in press release. This follows a Series B round just six months prior, during which Doppel achieved a threefold valuation increase according to Morningstar reporting.

The funding underscores growing demand for solutions to combat AI-driven social engineering threats, which cybercriminals increasingly leverage to craft hyper-personalized attacks across platforms, from social media to dark web channels. Doppel's platform employs agentic AI and a real-time threat graph to detect, dismantle, and simulate threats, while its Human Risk Management (HRM) product offers AI-generated security awareness training and phishing simulations as described in company blog. The company reports 3x annual recurring revenue (ARR) growth year-over-year and a fivefold increase in Fortune 500 customers, now spanning 200+ clients across sectors including finance, healthcare, and technology per company press release.

Investor enthusiasm centers on Doppel's ability to address a critical gap in corporate cybersecurity. "Doppel stands out with its incredible speed, massive ambition, and laser focus on execution," said Bessemer Partner Elliott Robinson, emphasizing the firm's confidence in the startup's trajectory according to company blog. CrowdStrike's George Kurtz highlighted the urgency of the problem, noting that AI-powered attacks are "increasingly sophisticated" and require "defenses that can keep pace" as reported in Morningstar news.

Doppel's innovations have already attracted high-profile clients. Commerce, parent company of BigCommerce, credits the platform with reducing impersonation risks and safeguarding its brand according to company blog. A Fortune 500 agriscience leader reported a 93% reduction in exposed executive personally identifiable information (PII) after adopting Doppel's tools as reported in press release.

The company's collaboration with OpenAI on reinforcement fine-tuning (RFT) to automate threat neutralization further cements its technological edge as described in company blog.

Proceeds from the Series C will accelerate R&D for Doppel's Digital Risk Protection portfolio and expand HRM offerings, including simulation tools that mimic real-time deepfake-based attacks. The firm also plans to scale its global team and international operations, having already doubled in size year-over-year according to company press release. CEO Kevin Tian emphasized that the funding validates Doppel's mission to "protect the world from the deluge of social engineering attacks," a challenge he describes as "one of the most important problems in the post-AI world" as reported in company blog.

With generative AI enabling unprecedented attack vectors, Doppel's rise mirrors a broader market shift toward AI-native defenses. As cybercriminals weaponize AI to manipulate users, enterprises are prioritizing platforms that can outpace deception with innovation. For Doppel, the Series C marks not an endpoint but a catalyst-a $70 million leap toward scaling its vision in an arms race where the stakes are organizational resilience itself.