Manifold

Manifold Security, Inc. is a San Diego-based company that specializes in runtime security solutions for AI agents, providing comprehensive visibility into their operations without disrupting performance. Manifold Security was founded in 2025 in San Diego, US. The company focuses on securing AI agents operating on endpoints, offering novel solutions tailored to address the unique security challenges posed by autonomous systems.

There are no known subsidiaries or significant changes in business operations. The company has secured USD 8. 00 mn in Seed funding as of March 18, 2026, led by Costanoa Ventures, along with Cherry Ventures, Modern Technical Fund Management, and Rain Capital as investors. This marks the total amount raised by the company.

Manifold specializes in runtime security solutions designed for AI agents operating on endpoints. Its core product offering is an agentless platform that provides total runtime visibility into the actions of AI agents and the tools they interact with. By enabling organizations to monitor agent behavior without any friction or impact on performance, Manifold addresses the critical need for security in environments where AI agents operate autonomously. The platform is beneficial for enterprises facing challenges with unauthorized system access and data exposure, delivering insights that traditional security frameworks may overlook.

Manifold serves a diverse client base that includes Fortune 500 companies across North America, Europe, and Asia, capitalizing on the growing demand for enhanced security measures as AI technology becomes increasingly prevalent in business operations. Revenue generation for Manifold occurs primarily through a subscription-based model, whereby clients access the platform and its features for fixed recurring fees. This pricing structure facilitates seamless integration into existing IT infrastructures, allowing organizations to scale their usage according to their needs. Business transactions typically involve contractual agreements outlining service terms, duration, and costs associated with the level of visibility and protection required.

Manifold's services are particularly valuable to clients who require real-time oversight of AI agent activities, ensuring security without compromising innovation. As of March 2026, Manifold is focused on utilizing its recent Seed funding of USD 8. 00 mn to enhance the development of tools that protect autonomous AI agents on enterprise endpoints. The company is planning to expand its product range and enter new markets, although specific regions have yet to be disclosed.

The funding will support the creation of advanced security measures, positioning Manifold to better meet evolving demands in the AI security landscape.