Pluto Security Raises $42M to Monitor AI Agents

Pluto Security emerges from the shadows with $42 million and a promise: to observe in real-time what AI agents are doing in corporate environments. The startup claims to have surpassed $2 million in ARR since April and boasts over 30 clients. It also leverages Plutonium, a free platform used by thousands of professionals, to fuel its pipeline.

Control Shifts to AI Agent Activity

Pluto prioritizes a security approach focused on monitoring AI agents rather than users. Its leader explains that the focus has now shifted "from user behavior to agent behavior." Its software tracks the AI tools used by staff, skills, extensions, MCP servers, and other elements, as well as applications and agents under development. According to the company, it is possible to identify components that pose a risk, detect potentially dangerous activities, and implement policies without restricting the use or creation of tools. Management states that the system can intervene during an agent's execution: if it attempts to obtain unauthorized permissions, the action can be halted or accompanied by instructions prompting the agent to seek confirmation. The publisher also claims to be able to inject context into the session to alter the agent's behavior.

Integrations and Sensors for Local Visibility

To operate, the solution connects to endpoint security and device management systems and can deploy its own sensors through these layers or directly on workstations. It collects information such as prompts, commands, processes, permissions, and user activity history. Lightweight models are run on endpoints to assess what an agent is attempting to do. The ecosystem also includes an MCP scanner and a catalog of verified components accessible via its associated platform.

Non-Developer Use Cases Account for the Majority of Risks

The widespread access to AI tools multiplies unexpected use cases, fueling fears of new vulnerabilities in systems. The company's management observes that a new tool can find its way into a company just two hours after its release. They estimate that about 60% of the risks detected among their clients come from tools developed by non-developers, with finance departments leading the way, followed by marketing and then legal; developers rank fourth. One cited case involves an application created by a finance employee at a Fortune 500 company to track customer information and churn, which was left exposed to the Internet. Risks vary according to the CISO's posture and the organization's appetite for AI, but the publisher claims to have never conducted a POC without identifying malicious elements, with some tests even coinciding with active attacks.

Commercial Traction and Community Leverage

The company states that it began marketing its offerings in April and has crossed the $2 million mark in annual recurring revenue, while counting over 30 client companies, including Oscar Health, Workato, Sixt, and AlphaSense. At the same time, it has made Plutonium available, a free platform designed for assessing risks associated with publicly accessible AI skills, connectors, and add-ons. Management says that thousands of professionals use it and that its community serves as a significant source of feedback and leads. They estimate that 70% of their pipeline comes from inbound interest, without specifying the fraction directly attributable to Plutonium.

Funding and Investment Priorities

Pluto Security announces $42 million raised, combining an $8.5 million seed round led by TLV Partners, with founders from Armis among the investors, and a $34 million Series A led by Jump Capital with participation from Skinos, Ansa Capital, and other angel investors. This momentum comes amid a backdrop where new security companies are raising significant amounts, believing that existing tools are insufficient to govern the use of AI systems. The company plans to allocate the capital to product development, strengthening security research, and expanding its presence in the U.S. It currently has 40 employees spread between the United States and Israel.