Rein Security raises $25M Series A to secure enterprise AI agents

Rein Security, an Israeli startup building runtime security tools for enterprise AI agents, closed a $25 million Series A round, bringing its total funding to $35 million. The company's platform is designed to protect AI agents from adversarial attacks and ensure safe execution in production environments.

The startup reported eightfold revenue growth since January and is now securing thousands of AI agents that collectively execute millions of actions. The funding validates growing demand for safety and security infrastructure as enterprises deploy autonomous AI systems at scale.