AI security startup AIR has emerged from stealth with $50 million in seed funding across two rounds to help enterprises monitor and secure the tools their AI agents use. As companies increasingly deploy AI agents that can load skills, plugins, MCP servers, and other add-ons to interact with databases and the internet, a new software supply chain is forming. AIR argues that these components lack the oversight traditionally applied to drivers or applications. The platform discovers AI agents running across a company’s environment, continuously vets the skills and add-ons those agents use, and blocks interactions with software or external sources that fail security checks. It also maintains a marketplace of vetted add-ons.

The company was founded by Yair Saban (CEO) and Niv Hoffman (CTO), veterans of Israel’s Unit 8200 intelligence corps with backgrounds in offensive cybersecurity. The first seed round raised $10 million led by Sequoia, and the second raised $40 million led by Greenoaks, with participation from Swish, Netz, Zach Frankel, Yinon Costica, Ofir Erlich, Anne Neuberger, and others.

The core product consists of three layers: visibility to find active agents and identify employees using unapproved AI tools; an enforcement layer that hooks into agents to intercept and analyze actions such as loading a skill or fetching web content; and a whitelist of approved tools maintained by AIR. The startup continuously monitors publicly available skills and add-ons for changes or malicious behavior, claiming it currently filters out about 27% of the add-ons it finds online.

AIR reports more than 20 customers, with about a quarter being large enterprises. The strongest demand so far has come from regulated industries such as financial services and pharmaceuticals. The company faces competition from Noma Security, Zenity, Astrix Security, and Operant AI, which offer similar discovery and runtime monitoring features. However, Saban believes AIR‘s moat lies in its continuous vetting of the skill and add-on ecosystem, a process that is harder to replicate than basic visibility. He also expects that while AI providers will eventually add security checks, companies will still prefer vendor-independent products.

AIR currently has around 40 employees. The new funding will primarily go toward hiring researchers and expanding go-to-market efforts in the U.S. and Europe.