Sequoia and Greenoaks just dropped $50M on a six-month-old AI agent firewall. Your CISO has no idea what your agents are connecting to.

AIR Security emerged from stealth this week with $50 million across two seed rounds.

Sequoia led $10 million. Greenoaks led $40 million. Both closed within weeks of each other.

The product is an inline firewall for AI agents.

It discovers every agent running inside your company. Continuously vets every skill, tool, and MCP server those agents use. Blocks interactions that fail security criteria.

AIR found 17,800 public AI add-ons linked to untrusted external sources. 6.7 million installations affected.

Your agents are autonomously installing tools, connecting to internal systems, and making decisions. In most organizations, nobody knows what's running, what's trusted, or how to shut it off.

AIR already has 20+ customers. Financial services and pharma are leading adoption. Both industries where a compromised agent means regulatory exposure, not just bad PR.

Founded by two Unit 8200 veterans. Angel investors include the president of Cognition and the co-founder of Wiz. When the people who built cloud security's biggest exit are backing this category at seed, the attack surface is already real.

Audit your agent inventory today. If you cannot list every tool your agents connect to, you are operating blind. The agent supply chain is the new software supply chain. AIR just proved it with a $50 million bet from two of the sharpest firms in venture.

SOURCE: https://techcrunch.com/2026/09/01/air-raises-50m-to-help-companies-vet-the-skills-and-add-ons-ai-agents-use/
VERIFIED: TechCrunch, SecurityWeek, TechStartups, Dealroom
SIGNAL: Enterprise AI agents are connecting to unvetted tools at scale. This is the first dedicated firewall for that attack surface, backed by tier-1 capital at seed stage. The agent security category just became real.