Doppel Raises $35 Million to Combat Deepfakes and Phishing with AI

Defend what’s real, disrupt what’s not, says the team of Doppel, the AI-powered social engineering defense platform that has recently announced a $35 million Series B funding round, bringing its total funding to $54.4 million. The round, which values the company at $205 million, is led by Bessemer Venture Partners, with participation from new investors 9Yards Capital and Sozo Ventures. Existing backers including Andreessen Horowitz (a16z), South Park Commons, Strategic Cyber Ventures, Script Capital, and Sabrina Hahn have also doubled down on their support, reflecting growing confidence in Doppel’s mission and traction.

Founded to tackle one of the most insidious and fast-evolving categories of cyber threats social engineering Doppel has grown rapidly since its Series A just over a year ago. In that time, the company has quadrupled its enterprise customer base, tripled its annual recurring revenue, and achieved an eightfold increase in expansion revenue from existing clients. 

Since 2022, the company has maintained a staggering 230% compound annual growth rate, a signal not just of momentum, but of product-market fit in an industry scrambling to adapt to AI-powered threats.

Elliott Robinson, partner at Bessemer Venture Partners, calls Doppel “the market leader in social engineering defense,” citing its proprietary AI models as critical infrastructure in an era where phishing, deepfakes, and impersonation attacks are becoming hyper-personalized and increasingly difficult to detect. “We’ve been blown away by the company’s growth and the real-world efficacy of its platform,” Robinson said. “Doppel is tackling a problem that’s only growing more sophisticated by the day, and doing so with remarkable precision and speed.”

Doppel’s platform, called Doppel Vision, offers full-spectrum visibility into threats targeting executives, employees, brands, and even third-party partners. It monitors everything from domain spoofing and email impersonation to deepfake videos and rogue mobile apps. What makes it stand out isn’t just its broad coverage, it’s the way it maps and dismantles the attacker’s infrastructure itself, rather than playing reactive defense. Threats aren’t just taken down; they’re traced to their source, analyzed, and neutralized across the entire attack surface.

That visibility is powered by the convergence of large language models and expert human analysis. Doppel has been working closely with OpenAI to fine-tune AI agents on thousands of real-world decisions made by its cybersecurity experts. The result is what may be the first generation of cybersecurity AI agents capable of independently identifying obscure and emerging social engineering threats and taking action in real time. 

What sets Doppel apart is its use of autonomous AI agents that continuously scan the internet, social media, and the dark web to identify fake accounts, malicious ads, and impersonation attempts.

Doppel Vision, maps cross-channel threats into a unified view. Whether a bad actor is spoofing a CEO via email or creating a fake app to mimic a brand, Doppel’s system connects the dots fast. It’s already reported median takedown times of just over 10 hours for malicious domains and social media accounts. Most recently, Doppel expanded its AI capabilities to include deepfake detection through a partnership with GetReal Security. This integration allows the platform to analyze and verify the authenticity of videos, images, and audio, detecting deceptive AI-generated content before it causes reputational damage or spreads misinformation. As Doppel’s CEO and co-founder Kevin Tian said, “Our partnership enables brands to detect and respond to these threats wherever they occur in the digital landscape.”

Marc Manara, Head of Startups at OpenAI, described Doppel as a case study in how domain expertise and reasoning models can transform entire industries. “They’re not just detecting risk, they’re starting to understand and respond to it at scale,” he said.

The results are already measurable. Within months of deploying these AI agents, Doppel doubled the efficiency of its operations team, and upcoming product releases are expected to accelerate that impact even further. For partners like Secure Consult, which specializes in executive protection, the impact is profound. “We view executive protection as a cornerstone of modern risk management,” said David M. Gordon, CEO and founder. “Our partnership with Doppel enables us to respond to threats across the entire lifecycle from discovery to resolution in real time. This is what modern security demands.”

As Doppel steps into this next chapter, CEO Kevin Tian sees the company not just as a product vendor, but as an emerging standard-bearer for what AI-driven cybersecurity should look like. “We’re building the first true social engineering defense platform,” Tian said. “With this new funding, we’re doubling down on our core products, meeting the growing demand from enterprises across all sectors, and continuing to lead the way in how AI can defend against the most human of cyber threats.”