AIR

Reviewed Updated Sep 1, 2026

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Location Israel
Latest Stage Seed
Total Raised $50M
Website https://air.security
Sector
security cybersecurity developer-tools ai-infrastructure

Investors

Sequoia Capital seed (2026)
Greenoaks Capital seed (2026)

Founders

Yair Saban CEO
Niv Hoffman CTO

About

AIR (air.security) is an Israel-based security startup that helps companies vet the skills, capabilities, and add-ons that AI agents use — treating agent extensions and third-party tools as a supply-chain risk surface. The company came out of stealth on September 1, 2026 disclosing $50M raised across two seed rounds: a $10M first round led by Sequoia Capital and a $40M second round led by Greenoaks Capital 134. Co-founders Yair Saban (CEO) and Niv Hoffman (CTO) met roughly a decade earlier while serving in Israel’s Unit 8200 with backgrounds spanning offensive cybersecurity, enterprise infrastructure, and AI security research 14. The company operates with ~40 employees in Israel 4 and recently added Ryan Knisley — a two-time Fortune 50 CISO (Costco, Walt Disney) — as Chief Strategy Officer 23. Prior to the launch, AIR’s research team published a series of disclosures on supply-chain vulnerabilities in the agent ecosystem, including “MCPJacking” (155 hijackable MCPs, August 27, 2026) and “SkillJacking” (925 hijacked skills, July 2, 2026) 2.

Funding History

Date Round Amount Lead Co-investors
2026-09-01 Seed (second) $40M Greenoaks Capital Sequoia Capital, Swish, Netz, Zach Frankel (Cognition), Yinon Costica (Wiz), Ofir Ehrlich (Eon), Anne Neuberger, Omer Adam, Varun Anand (Clay) 1234
2026-09-01 Seed (first) $10M Sequoia Capital 12

What Investors Say

Bogomil Balkansky (Partner, Sequoia Capital): “They saw early that AI agents would create a completely new security problem for enterprises and started building for it before most companies were even thinking about it.” 3

Bogomil Balkansky (Partner, Sequoia Capital): “This is not a scanning problem, it is a continuous re-verification problem.” 1

What Founders Say

Yair Saban (CEO, Co-Founder): “Every enterprise has a firewall protecting its network. Now they need one protecting their AI agents.” 4

Yair Saban (CEO, Co-Founder): “2026 is the year of coding agents — Claude Code, Cursor, Codex, and everything around them. Enterprises have started adopting these tools at an unprecedented pace.” 2

Sources

  1. TechCrunch, “AIR raises $50M to help companies vet the skills and add-ons AI agents use,” September 1, 2026. Accessed September 2026. https://techcrunch.com/2026/09/01/air-raises-50m-to-help-companies-vet-the-skills-and-add-ons-ai-agents-use/↩↩↩↩↩

  2. AIR company blog, “AIR is Coming Out of Stealth” (Yair Saban byline), September 1, 2026. Accessed September 2026. https://www.air.security/blog-posts/out-of-stealth↩↩↩↩↩

  3. Yahoo Finance, “AIR Emerges from Stealth With $50M to Build a Firewall for Agents,” September 1, 2026. Accessed September 2026. https://finance.yahoo.com/technology/ai/articles/air-emerges-stealth-50m-build-150000907.html↩↩↩↩

  4. CTech (Calcalist), “Six-month-old AIR Security raises $50 million to build a firewall for AI agents,” September 1, 2026. Accessed September 2026. https://www.calcalistech.com/ctechnews/article/r13apdnugg↩↩↩↩↩