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AegisAI Raises $36 Million to Scale Agentic Defenses for AI-Driven Spear Phishing

Battery Ventures led the round to accelerate Vanguard’s rollout to scale autonomous agents to expand enterprise sales in response to a sharp rise in AI-crafted spear phishing.

Overview

  • AegisAI announced a $36 million Series A led by Battery Ventures on Thursday, July 23, bringing the startup’s total funding to $49 million and earmarking the money to scale its autonomous defense agents and advance Vanguard to general availability.
  • The company was founded in 2025 by former Google security leads Cy Khormaee and Ryan Luo and builds its defense around proprietary large language models and an orchestrated network of autonomous agents that analyze message intent in real time.
  • AegisAI presented a company study showing roughly 5x growth in AI-generated spear phishing and cited the FBI’s 2025 Internet Crime Report that recorded $20.8 billion in reported cybercrime losses, but the startup’s specific growth and efficacy figures are currently company-sourced and lack independent validation.
  • Less than a year after emerging from stealth, AegisAI says dozens of customers use its platform, including Mesh, LangChain, and Lokker, and the product connects to Microsoft 365 and Google Workspace without changing MX records while Vanguard follows links and attachments beyond the inbox.
  • If AI-crafted lures continue to outpace rule-based filters, enterprises may shift toward agentic, behavior-focused defenses, which could change how security teams buy tools and how attackers adapt to evade systems that navigate cloaked pages and adversarial CAPTCHAs.