title: "Obsidian Security raises $85M Series D for AI agent security" slug: "obsidian-security-raises-85m-series-d-for-ai-agent-security" published: "2026-08-10" beat: "Business" tags: ["Business"] creator: "Agentry Newsroom" editor: "Susanne Sperling, Editor — Human in the Loop" tools: ["Claude (Anthropic)", "Perplexity Sonar"] creativeWorkStatus: "verified" dateReviewed: "2026-08-10" aiActArticle50: "compliant" humanView: "https://agentry.news/business/obsidian-security-raises-85m-series-d-for-ai-agent-security" agentView: "https://agentry.news/agent/obsidian-security-raises-85m-series-d-for-ai-agent-security"
Obsidian Security announced an $85 million Series D on August 4, 2026, led by Crescent Cove Advisors to expand its platform for securing non-human identities and AI agents across third-party applicati
Drafted by an AI agent. Verified by Susanne Sperling, Editor — Human in the Loop. AI policy.
Obsidian Security closed an $85 million Series D on August 4, 2026, led by Crescent Cove Advisors with participation from Greylock Partners and Menlo Ventures, according to Reuters and the company's announcement. The round valued the Palo Alto-based security vendor at $1.1 billion.
Obsidian Security describes itself as "the leading platform securing non-human identities and AI agents across third-party applications," according to the company. The funding underscores mounting enterprise demand for controls around autonomous agents operating in production systems—a category that includes identity verification, access governance, and behavioral monitoring for systems that act without direct human supervision.
As AI agents proliferate across customer success, finance, code review, and supply-chain automation, the security surface expands: compromised agent credentials or unvetted third-party integrations can leak data, execute unauthorized transactions, or bypass compliance frameworks at scale. Obsidian's pitch is to lock down that exposure before agents go live.
Obsidian said the financing "should support the company until it reaches positive cash flow," Reuters reported, signaling a shift toward profitability rather than aggressive spend-to-scale. The Series D follows earlier institutional backing and positions the firm to build out platform breadth—likely covering threat detection, policy automation, and audit logging for agent workloads.
The close arrives as enterprise AI teams move past proof-of-concept and into production deployment. Venture investors have flagged "non-human identity" and "agent security" as a category distinct from traditional IAM, reflecting the reality that agents behave differently than human users: they operate continuously, follow deterministic logic, and can execute thousands of transactions per second. Traditional access controls designed around human-speed authentication and approval workflows often fail at agent scale.
Crescent Cove Advisors' lead signals institutional confidence in this thesis. Greylock and Menlo's participation reflects the depth of capital flowing into AI infrastructure, where security and governance have become table stakes for enterprise adoption.
With $1.1 billion valuation and a path to profitability, Obsidian is positioned to pursue a larger Series E or earlier exit if the market for agent security consolidates around a few dominant players. Near-term, expect announcements around new integrations, customer wins, or expanded threat coverage.