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Rein Security raises $25 million in Series A financing, co-led by Glilot Capital and Sienna Venture Capital, to enhance security for AI agents in enterprises.
PRIVATEOct 08, 2026
Amount Raised
$25 Million
Round Type
Series A
Information TechnologySecurityCyber SecurityNetwork SecurityCloud Security
Investors
Rnp Capital AdvisorsAtlacleCorner VenturesSienna Venture CapitalGlilot Capital
Description
Rein Security has successfully raised $25 million in a Series A funding round, with total funding secured to date reaching $35 million. The round was co-led by Glilot Capital and Sienna Venture Capital, along with participation from Corner Ventures, Atlacle, and RNP Capital Advisors. This financing will help Rein Security address emerging security challenges related to the deployment of AI agents across business systems. Their patented sidecar technology provides critical visibility and governance over agent actions.
Company Information
Company
Rein Security
About
Rein Security is a cybersecurity company focused on addressing critical vulnerabilities in application security and AI. Founded in 2024 by 8200 alumni, the company has developed technology that enables organizations to unify application security operations within a single platform. Their platform addresses key AppSec use cases, including API security and SCA reachability, by applying application runtime context to surface validated risks. Rein Security operates offices in Tel Aviv and New York with a team of approximately 23 employees.
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