Island, the enterprise-focused agentic control plane provider, secured $400 million in a Series F funding round on September 25, 2026, pushing its valuation to $6.4 billion. This capital injection follows a period of rapid growth for the company, which has seen its valuation more than double since 2024.
Evolution Equity Partners led the investment round, which included participation from a broad consortium of existing and new financial backers. Notable participants included Prysm Capital, Sequoia Capital, Coatue Management, Cyberstarts, Insight Partners, J.P. Morgan Growth Equity Partners, Alta Park Capital, Georgian, G Squared, and Squarepoint. Cybersecurity entrepreneur Dmitri Alperovitch also contributed a personal investment to the round.
The company plans to utilize these funds to accelerate product development as organizations increasingly integrate AI agents into their core operational workflows. Island currently employs 1,000 staff members and has reported a doubling of its annual recurring revenue in every fiscal year since its 2022 launch. This growth trajectory is driven by enterprise demand for security frameworks that do not impede user productivity.
Island initially defined the enterprise browser category by embedding security, access, and productivity controls directly into the primary environment for knowledge work. The firm has since expanded its technical footprint to include endpoints, applications, modern secure access service edge (SASE) architectures, and data protection. Its current platform provides a single policy engine and audit trail across these diverse environments.
The platform acts as a centralized hub for onboarding, governing, and auditing AI activity across both human and agent-based workforces. By offering identity governance, access guardrails, and data boundaries, the company allows businesses to scale AI deployments regardless of the specific models or applications in use. This infrastructure covers browsers, endpoints, cloud resources, and internal systems.
The technical architecture relies on a unified policy engine that enforces security rules at the point of interaction, rather than relying on perimeter-based defenses. By intercepting requests within the browser and at the endpoint, the platform ensures that sensitive data remains protected even when accessed by automated agents. This granular control allows security teams to define specific boundaries for AI behavior, preventing unauthorized data exfiltration or policy violations during automated tasks. Furthermore, the system utilizes advanced telemetry to map user and agent interactions, providing real-time visibility into how data flows between internal applications and external AI models.
Richard Seewald, founder and managing partner at Evolution Equity Partners, noted that the firm is capitalizing on a fundamental shift in corporate computing architecture. He observed that Island provides a unique advantage by governing the interaction between users, agents, and data at the application level.
Mike Fey, CEO and co-founder of Island, stated that the company is addressing the requirements of a workforce where humans and AI agents collaborate in real time. He emphasized that agents require the same level of context, access control, and accountability as human employees to function effectively within an enterprise environment.
The technical strategy focuses on consolidating security and governance into a single framework for CIOs and CISOs. By building from the endpoint outward, Island aims to displace legacy technologies that struggle to manage the complexity of modern, agent-driven work environments. This approach ensures that security policies remain consistent as work moves between browsers, endpoints, and cloud networks, maintaining an uninterrupted user experience while enforcing strict compliance.
Future development will likely prioritize deeper integration with emerging AI agent frameworks and expanded data governance capabilities. As enterprises continue to overhaul their operational models, the ability to maintain a unified audit trail across heterogeneous environments will remain a critical technical differentiator for the company. The firm faces the challenge of maintaining this integrated operational flow while scaling to meet the demands of global enterprise clients.