Island raises $400M at $6.4B valuation to govern AI agents
The enterprise browser security company is building a control plane to manage both human employees and autonomous AI systems across corporate infrastructure.
Island, the cybersecurity company that pioneered the enterprise browser category, has closed a $400 million Series F funding round at a $6.4 billion valuation—more than doubling its worth since 2024. The financing, led by Evolution Equity Partners, will fund the company's expansion into what it calls an "agentic control plane" designed to govern AI agents operating inside corporate environments.
Why it matters
As enterprises deploy AI agents with increasing autonomy to interact with applications, data, and systems, they face a fundamental governance challenge: these agents don't operate within a single technology layer. Island's approach addresses a critical gap in how organizations will need to audit, control, and secure AI-driven work alongside human activity—a problem that traditional security tools weren't designed to solve.
From browser security to agentic control
Island emerged from stealth in 2022 with an enterprise browser that embedded security and IT controls directly into the employee experience. The company established a new security category and quickly gained traction—eight of the world's 10 largest banks now use its enterprise browser, according to Island.
The company has since expanded beyond the browser into consumer browser extensions, endpoints, applications, SASE architecture, and data protection. This expansion laid the groundwork for what co-founder and CTO Dan Amiga describes as a necessary evolution: "Agents do not operate in a single layer of the technology stack, so they cannot be governed from one."
Island's agentic control plane integrates controls across endpoints, networks, data, identity systems, and observability tools. The goal is to provide organizations with unified visibility into who or what is acting, what resources they can access, what data they can use, and whether specific actions should be permitted—whether the actor is human or AI.
Rapid growth trajectory
Island's financial momentum reflects strong enterprise demand. The company reached approximately $200 million in revenue by September 2026 while maintaining roughly 100% annual growth. It has doubled its annual recurring revenue every fiscal year since launch, according to company statements.
The workforce has expanded to 1,000 employees, up from more than 500 the previous year. Island previously raised $250 million at a $4.8 billion valuation in March 2025, following a $175 million round in 2024 at a $3 billion valuation.
Unified governance for hybrid work
CEO Mike Fey, who co-founded Island with Amiga, framed the company's approach around a parallel between human and AI workers: "Just like humans, agents need the right context, access, guardrails, and accountability to succeed."
The platform applies a single policy engine and audit trail across what Island describes as the "chain of human and agentic work." This includes identity governance, access controls, guardrails, data boundaries, human approval workflows, and cost management.
The Series F round included participation from existing investors Prysm Capital, Sequoia Capital, Coatue Management, Cyberstarts, Insight Partners, J.P. Morgan Growth Equity Partners, Alta Park Capital, Georgian, G Squared, and Squarepoint. Dmitri Alperovitch, the cybersecurity entrepreneur and former CrowdStrike CTO, also made another personal investment.
These details were first reported by Calcalist.
This is an original analysis by the Omega editorial team. Source reporting: AI Watch.
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