Nowadays, there is much talk about how generative AI makes things like impersonation, deepfakes, and phishing much cheaper and more scalable. One tech startup in San Francisco believes the best defense in such a case must be another AI. Doppel, whose website is doppel.com, was founded back in 2022 and quickly became a main competitor in the field of social engineering defense (SED). To put it simply, the company’s mission is to save the world every day from social engineering attacks by uncovering, eliminating, and reproducing threats before they can bring about irrevocable harm.
Origins and Vision
Pioneers of the joint venture Kevin Tian (CEO) and Rahul Madduluri (CTO) got introduced when handling the Uber Elevate project, the company’s flying-car project. At first, they started Doppel to assist cryptocurrencies companies fight against fake identities. Yet, the pair realized that the problem affected a broader audience. Tian said that the “most dangerous thing about AI is that a persona can be a perfect copy of the original so easily”. Since traditional cybersecurity systems were made for dealing with threats like malware and network issues, modern techniques of social engineering such as impersonated social media personas, fake websites, evil advertising, deepfake voice calls, phishing through SMS etc. would easily beat them.
Doppel claims that it is an AI-first company that flips the script for the hackers’ benefit. It leverages AI agent systems, as well as a live threat database (Threat Graph), which joins different signs (spoof domains, fake accounts, scam ads, malicious messages) into orchestrated campaigns instead of seeing them as one off events. While the platform auto-deactivates the malicious infrastructures, it simultaneously updates and educates the employees on the threat intelligence and conducts real-life threat simulations.
Core Platform and Products
Doppel’s offering centers on three interconnected solutions sharing a common intelligence layer:
- Digital Risk Protection is a product that constantly searches for threats in domains, social media advertisements messenger applications, app marketplaces, the darkweb and even new kinds of communication channels. After the discovery of threats the product connects those threats together via the use of the Threat Graph and initiates fast responses (the average time it takes to remove a phishing domain is less than one hour in many instances).
- Human Risk Management: by using actual attack data the tool builds realistic phishing simulations (even using artificial voices like deepfake) and conducts training about cyber security, which are both security awareness and educational materials. This strategy goes beyond sending out emails aiming to drilling users to raise the awareness of phishing attacks among them, instead presents actual attacker playbooks in realistic and multi-channel scenarios that are tailored to each organisation.
- Their email technology and other related features have agent driven detection and response capabilities that can leverage the same Threat Graph intelligence to close their response loop. The organization highlights a hybrid approach where AI is responsible for high-speed and high-volume tasks while human experts ensure that AI decisions are correct and models get improved continuously.
- Doppel has worked with OpenAI in such a way that the cybersecurity decision-making models are trained to their very finest level by experts thereby agents are born who can find rare social engineering signals among the enormous dataset.
Rapid Growth and Funding
- Doppel has executed an unusually fast fundraising trajectory. Key rounds include:
- Seed (2022)
- Series A (~$14-$19M range, Andreessen Horowitz / a 1 6 z led in early 2024)
- Series B (~$35M, Bessemer Venture Partners led in May 2025, valuing the company at ~$205M; overall raised ~$54-$55M)
- Series C (~$70M, Bessemer led in November 2025, only six mois later), total funding ~$124M, and valuation over ~$600M.
New Series C investors were CrowdStrike CEO George Kurtz, NTT DOCOMO Ventures, Aurum Partners (tied to San Francisco 49ers’ owners) besides athlete investors supported by the a16z Cultural Leadership Fund. Longtime supporters like a16z, South Park Commons, Strategic Cyber Ventures, 9Yards Capital, Sozo Ventures, Script Capital, Amex Ventures & others are there too. The company’s growth has been outstanding: 3x ARR year-to-year in a short period, a five-fold surge in Fortune 500 customers; from a crypto focus to finance energy utilities, healthcare technology manufacturing, media & other major industries. Doppel is reported to have blocked multiple Fortune 500 companies (Coinbase Ramp United Airlines OpenAI Notion & others are examples) which the firm gave as proof. Also, the customer base is currently exceeding 200, 250 entities! A step into Japan is part of the international expansion plan.
Doppel made it onto the Fortune Cyber 60 (early growth) list and it has also been acknowledged for AI-driven solutions they brought to the market. Why It Matters
Social engineering is one of the leading and quickest-growing methods with which cybercrime is committed and it’s being made possible through the use of generative AI that enables cybercriminals to produce believable social campaign scripts with minimum expenditure. Traditional tools, such as security awareness and digital risk protection, are unable to keep pace with the threat’s speed and sophistication. The company believes that only an AI-native system, able to match attacker volume, correlate multi-channel infrastructure, automate disruption, and convert real threats into realistic training, can make a company “too costly to attack.” Still, there still some issues that need solving: the cat-and-mouse game against changing adversaries, the need to strike a balance between automation and accuracy (because of the possibility of false positives that are very damaging if they happen quite often), there are also legal and privacy implications about monitoring public digital surfaces as far as what can and cannot be done and Truth is a new generation of more realistic looking counterfeit videos is also being produced.
That said, the company’s rapid customer growth, backing from the investors, in particular the ones who understand cybersecurity at the deepest level, and its products’ expansion into simulations and email security show that they are onto a good thing for product-market.
Looking Ahead
Raised capital will be invested by Doppel in engineering, product innovation, and worldwidedistribution. Through this, it wants to get entrenched as the platform for the defense of reality and the undoing of the not so reality. In a situation where it’s easy to lose your trust in social media, startups like Doppel show how AI could not only be used for the offensive side but also for the defense side at scale, with an initiative.
For the recent news, refer to doppel.com. The hiring and expanding operations of the platform will be ongoing since the AI-powered threats are continuously developing.