News1 min read·
AI Security Firm Rein Closes $25 Million Series A
AI agent security startup Rein Security closed a $25M Series A round, bringing its total funding to $35M.
ImportanceLocalEvidenceE3 inspectableWrite-upQuick
Rein Security announced a $25 million Series A funding round backed by Glilot Capital, Sienna Venture Capital, and others.
The company focuses on securing AI agents at runtime using micro-segmentation and execution-layer controls to prevent malicious actions without stopping workflows. Its platform is already deployed by enterprises like Flex and Lemonade.
This round brings Rein's total raised to $35 million, supporting global hiring and product development to address evolving agentic threats.