Doppel

• Founders:

  Kevin Tian and Rahul Maddulri​

• Founded:

  2022​

• HQ Base:

  San Francisco, CA​

• Company Size:

  201-500​ Employees

• Total Funding:

  $124M, Series C

Overview​

Doppel is an AI-native social engineering defence platform that autonomously detects and dismantles impersonation, phishing and deepfake attacks, and trains staff through attack simulations.

Key Technology Insights​

Doppel scans the public internet daily for impersonation of brands and people. It treats attacks as coordinated campaigns, mapping the infrastructure and taking it down via registrars and direct platform relationships. Campaign identification and takedowns are mature capabilities from Doppel.​ A second product runs voice-cloning simulations to train staff to be aware of deepfake attacks. ​

Industry Application​

The most established use case is enterprise brand protection through automated takedowns, across finance, tech, healthcare and defence, with 200+ customers like Coinbase. Doppel also protects executives from impersonation and trains staff with deepfake simulations. Doppel collaborated with Defending Digital Campaigns (DDC) to protect political candidates in the 2024 US presidential election and detected close to 400 suspicious domains related to major 2024 presidential candidates.​

Strategic Perspective​

As attackers weaponise AI to impersonate, Doppel reframes security around protecting people rather than systems. Its advantage is campaign-level takedowns paired with human training. In growth stage, it spans enterprise and public-sector protection in an escalating AI-versus-AI arms race.