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AIR Closes $50M to Secure AI Agent Supply Chain

The big picture: AI security startup AIR has emerged from stealth with $50 million raised across two seed rounds to build a platform monitoring the growing ecosystem of skills, plug-ins, and MCP servers that AI agents use to interact with company systems and the internet. The company was founded by Yair Saban, CEO, and Niv Hoffman, CTO, both veterans of Israel’s Unit 8200 intelligence corps.

Why it matters:

  • Agent Vulnerabilities: AI agents are increasingly resembling operating systems, but their tools and add-ons lack proper verification, creating significant security gaps within enterprise environments.
  • Real-time Enforcement: AIR’s platform provides critical real-time security by discovering active agents, flagging unapproved AI tool usage, and enforcing security checks on agent actions.
  • Market Demand: Strong demand from highly regulated sectors like financial services and pharmaceuticals underscores the urgent need for specialized AI agent security solutions.

How it works:

  • Discovery & Flagging: The platform actively discovers AI agents across a company’s environment, identifying and flagging unapproved AI tool usage that could pose security risks.
  • Whitelist Filtering: It screens agent tools against a continuously updated whitelist, currently filtering out approximately 27% of evaluated add-ons to prevent unauthorized access or malicious activity.
  • Proactive Monitoring: AIR addresses the challenge as a continuous infrastructure problem, providing ongoing monitoring rather than simple scanning, as highlighted by Sequoia partner Bogomil Balkansky.

The catch: The AI agent security market is becoming increasingly competitive, with AIR facing similarly funded startups including Zenity, Noma Security, Astrix Security, and Operant AI. Differentiating its real-time enforcement capabilities and the efficacy of its whitelist filtering will be crucial to maintaining its edge and expanding beyond regulated sectors.

Key Facts

  • Company: AIR
  • Amount: $50M
  • Round: Seed
  • Investors: Sequoia and Greenoaks (co-lead), Zach Frankel, Yinon Costica, Ofir Ehrlich
  • Founders: Yair Saban, Niv Hoffman
  • Announced: 2026-09-07
  • Sector: AI Agent Security
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