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Rein Security Raises $25 Million to Guard AI Agents at Runtime

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Cybersecurity startup Rein Security announced a $25 million Series A round, bringing its total funding to $35 million. The round was co-led by Glilot Capital and Sienna Venture Capital, with support from Corner Ventures, Atlacle and RNP Capital Advisors. Rein, founded in 2024 and headquartered in Tel Aviv and New York City, extended its runtime protection platform to secure AI agents, which the company says already protect thousands of agents across multiple industries.

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