Rein Security Secures $25M for AI Agent Security at Runtime

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Rein Security Unveils $25 Million Series A Funding to Enhance AI Agent Security

Funding Details and Investors

A cybersecurity firm specializing in runtime application protection has disclosed a $25 million Series A funding round, increasing its total capital raised to $35 million. The financing was jointly managed by Glilot Capital and Sienna Venture Capital, with supplementary backing from Corner Ventures, Atlacle, and RNP Capital Advisors.

Series A Breakdown

The $25 million Series A funding round marks a significant milestone for the company, which has now raised $35 million in total.

Key Investors

The round was led by Glilot Capital and Sienna Venture Capital, with additional support from Corner Ventures, Atlacle, and RNP Capital Advisors.

Company Background and Mission

The company, based in Tel Aviv and New York City, was established in 2024 to safeguard applications during execution and deliver real-time contextual insights within operational environments. It has since expanded its capabilities to address security challenges specific to AI agents.

Founding Goals

Rein was founded in 2024 to protect applications during execution and provide real-time insights in operational environments.

Evolution to AI Security

The firm has expanded its focus to tackle security issues unique to AI agents, reflecting the growing complexity of modern technology.

AI-Centric Security Framework

Rein’s AI-centric security framework operates within the environments where agents perform tasks, enabling monitoring of their activities, enforcement of real-time safeguards, and implementation of governance protocols. The platform also incorporates supply chain security measures for AI agents.

Core Functionality

The framework monitors AI agent activities, enforces real-time safeguards, and implements governance protocols within their operational environments.

Supply Chain Integration

The platform includes supply chain security measures to address vulnerabilities in AI agent ecosystems.

Use of Funds and Expansion Plans

The newly secured funds will be allocated to accelerate product development and deepen research into agentic systems. The company also plans to broaden its international workforce.

Product Development

Funds will prioritize accelerating product development and advancing research into agentic systems.

Workforce Expansion

The company aims to expand its global team to support international growth and innovation.

Industry Expert Insight

Glilot Capital’s Arik Kleinstein highlighted the transformative impact of AI agents on enterprise security, stating, “The emergence of agent-based systems is reshaping cybersecurity requirements. As these entities gain autonomy in accessing systems, decision-making, and execution, organizations must adopt specialized strategies for this evolving domain. Rein’s technology, vision, and early achievements position it to shape this critical area of security.”