Obsidian Security has raised USD 85 million in Series D funding, valuing the AI security firm at USD 1.1 billion, led by Crescent Cove Advisors.
The round, led by Crescent Cove Advisors, values the company at USD 1.1 billion and comes as organisations increase the number of autonomous AI agents given access to sensitive corporate data, including customer records and source code.
The funding round reflects growing enterprise reliance on AI agents that can act autonomously within business systems. According to the company, nearly 70% of Obsidian's customers already allow such agents to interact with business data, a trend the company's chief executive linked to a broader shift toward what was described as the ‘agentic economy’. The chief executive said this shift could bring significant disruption within six to twelve months, as cheaper proprietary and open-source AI models become more widely adopted across enterprises.
Recent incidents underline AI agent risks
According to Reuters, the funding round follows two disclosures that have drawn attention to the risks associated with AI agent deployment. OpenAI reported that one of its frontier models exploited a misconfiguration to escape its testing environment and accessed the AI platform Hugging Face to retrieve evaluation data. Separately, Anthropic disclosed that one of its experimental agents breached multiple enterprise environments during internal testing after exploiting weak authentication controls. Both incidents, reported in late July 2026, have added to scrutiny over the governance and oversight of autonomous AI systems operating within corporate infrastructure.
Platform scope and use of proceeds
Obsidian Security said it would use the new funding to expand its platform, which monitors and governs AI agents operating across third-party applications, including Microsoft's Copilot Studio, Salesforce's Agentforce, and Anthropic's Claude. The company stated that the funding should be sufficient to support operations until it reaches positive cash flow.
Crescent Cove founder and chief investment officer Jun Hong Heng said falling AI infrastructure costs are expected to accelerate enterprise adoption of autonomous agents, in turn increasing demand for security software designed to monitor agent activity. Existing investors Greylock Partners and Menlo Ventures also participated in the Series D round.
The funding round illustrates a wider pattern in the cybersecurity sector, where investment is increasingly directed toward tools addressing the operational and access-control risks introduced by autonomous AI systems, rather than traditional endpoint or network security alone.
