Pluto Security

JetStream Security, founded in 2026 in San Francisco, CA, offers an enterprise AI governance platform featuring visibility, identity, and runtime controls.

Harmonic Security, founded in 2023 in San Francisco, USA, identifies and monitors risky AI applications, tracks employee data usage, and provides real-time guidance to ensure data security.

B loom Security , a one-year-old Tel Aviv startup that helps security teams map applications, AI agents, plugins, and code on employee devices and block risky access, raised a $20 million seed round co-led by Glilot Capital Partners and Ten Eleven Ventures , with Okta Ventures and Runtime Ventures also chiming in. CTech has more here .

Act Security is a cloud security company founded in 2025 in Tel Aviv by the team behind Medigate (acquired by Claroty in 2021 for ~$400M). Its action-centric platform systematically reduces unused cloud access across humans, workloads and AI agents. It emerged from stealth in July 2026 with a $40M Series A led by Notable Capital, on top of a prior $20M seed led by Team8 and Bessemer, for $60M total.

Helmet Security, founded in 2025 in Washington D.C., is a cybersecurity company offering an end-to-end platform focused on protecting agentic AI communication infrastructure, particularly MCP-based servers.

Apex Security, founded in 2023 in Tel Aviv, provides security and risk governance for enterprise use of AI models.