Rein Security, an Israeli startup that builds runtime tools to secure enterprise AI agents, has raised a $25 million Series A. The round brings the company's total funding to $35 million, according to CTech.
The company says its revenue has grown eightfold since January, and that its platform now secures thousands of agents carrying out millions of actions. The news lands as businesses rush to put AI agents to work and look for ways to police what those agents actually do.
Rein Security's runtime approach to AI agents
Rein Security targets AI agents while they run, not only when they are built. Its tools are designed to keep enterprise agents inside their assigned limits and to stop adversarial agents that try to manipulate them, the company says.
That runtime focus matters because agents now touch real systems, send messages and move data on their own. A single hijacked agent can trigger a chain of actions faster than a human team can react, which is why monitoring behavior in real time has become a board-level concern.
- Funding: $25M Series A, $35M raised in total
- What it does: runtime security for enterprise AI agents
- Also targets: adversarial AI agents
- Traction: revenue up eightfold since January
- Scale: thousands of agents, millions of actions secured
