Rein Security Launches $25M Runtime Guard for AI Agents
Rein Security has raised $25 million to build runtime security controls for AI agents, targeting the largely unaddressed gap of monitoring and constraining agentic AI behaviour as it executes in production. This closes a meaningful defender blind spot: most existing security tooling was designed for static software and cannot observe or intervene in the dynamic, multi-step decision chains that AI agents produce. Residual gaps remain around what specific runtime signals Rein captures, how the platform integrates with diverse agent orchestration frameworks, and whether coverage extends to multi-agent pipelines.