Doppel
San Francisco AI-native digital risk protection platform that detects and automatically takes down phishing sites, impersonation accounts, and other AI-driven social engineering infrastructure targeting brands and executives.
Visit Website ↗ + Add to CompareOverview
Doppel, founded in 2022 and headquartered in San Francisco, builds an AI-native platform for detecting and dismantling digital impersonation, phishing, and social-engineering infrastructure aimed at brands, executives, and employees. Rather than only alerting on lookalike domains, fake social accounts, and phishing pages the way traditional brand-protection services do, Doppel emphasizes automated takedown — actively working to dismantle attacker infrastructure rather than just flagging it for a human team to chase down manually — combined with training and simulation to build organizational resilience against social engineering.
The company has raised a total of roughly $129 million across a $14 million Series A (January 2024, led by a16z), a $35 million Series B (May 2025, led by Bessemer Venture Partners), and a $70 million Series C (November 2025), the latter valuing Doppel at more than $600 million — a roughly 3x valuation increase in six months. Doppel reports 3x year-over-year ARR growth and more than a 5x increase in Fortune 500 customers, with a customer base including Coinbase, Ramp, and Orrick, among 200-plus total customers.
Doppel’s rise reflects a broader shift in the digital risk protection category toward AI-versus-AI defense: as generative AI lowers the cost of producing convincing phishing pages, fake executive profiles, and impersonation campaigns at scale, vendors that can match that speed with automated detection and takedown have an operational advantage over manual, analyst-driven brand-protection services. Its primary competition includes established digital risk protection and brand-protection vendors as well as newer AI-native entrants targeting the same social-engineering threat surface.
Innovation Matrix Assessment
Doppel has closed three funding rounds in roughly two years (Series A Jan 2024, Series B May 2025, Series C Nov 2025) with each round funding continued product expansion in automated takedown and AI-driven detection, evidence of a fast release and iteration cadence.
The platform is built to plug into brand-protection and security operations workflows with automated takedown execution rather than alert-only output, reducing the manual analyst effort typically required to action impersonation and phishing findings.
A roughly 3x valuation increase in six months (Series B to Series C), $129M+ in total funding, reported 3x year-over-year ARR growth, and a 5x increase in Fortune 500 customers together indicate strong, well-capitalized momentum.
Doppel's AI-native, automated-takedown approach responds directly to attackers' own use of generative AI to scale phishing and impersonation campaigns, a genuine shift from the largely manual, analyst-driven workflows of legacy brand-protection vendors.
Doppel's customer base includes recognizable, security-sophisticated brands (Coinbase, Ramp, Orrick) whose adoption is a meaningful signal, but the ARR growth and customer-count figures are vendor-reported rather than independently audited.
AI-generated phishing, deepfake impersonation, and social engineering are among the fastest-growing threat categories, making automated digital risk protection increasingly central to enterprise security programs.
Why CISOs Should Care
Doppel gives CISOs a way to keep pace with AI-accelerated phishing and impersonation campaigns by automating detection and takedown rather than relying on manual analyst triage, which matters as attackers increasingly use generative AI to scale convincing fake sites and profiles faster than human teams can respond.
What Makes It Different
Doppel emphasizes automated dismantling of attacker infrastructure rather than detection-and-alert workflows alone, explicitly framing its approach as AI-versus-AI defense against generative-AI-scaled social engineering, and has scaled funding and customer growth unusually quickly for the category.
The Matrix Verdict
73/100 — MEANINGFUL INNOVATOR
One of the best-funded and fastest-growing vendors in the digital risk protection / impersonation-defense space, with credible enterprise customers and a differentiated automated-takedown model; efficacy claims are largely vendor-reported and the space is starting to attract well-funded competitors, so durability of its lead is not yet independently proven.
Editorial Note: Claims vs. Verified Findings
Doppel's reported 3x YoY ARR growth, 5x Fortune 500 customer increase, and 200+ total customers are vendor-reported figures from company press materials, not independently audited. The Series C amount ($70M) and resulting ~$600M valuation were cross-verified across SecurityWeek, Fortune, and the company's own press release, all reporting consistent figures.
Sources
Alternatives to Doppel
Armis (a ServiceNow company)
Agentless asset intelligence platform discovering and assessing every connected IT, OT, IoT and medical device, now part of…
CybelAngel
External attack surface management and digital risk protection platform that scans the open, deep, and dark web for…
watchTowr
Singapore-based platform combining external attack surface management with continuous automated red teaming to validate whether exposures are actually…
CyCognito
Agentless attack surface management platform that maps organizations' entire external footprint, including subsidiaries and shadow assets, using graph-based…
Axonius
New York-based CAASM pioneer that aggregates data from hundreds of existing tools to build a unified, agentless asset…
IONIX
EASM vendor, formerly Cyberpion, that maps not just an organization's own internet-facing assets but the chain of third-party…