Closing a US$400 million Series F funding round lifted Island's valuation to US$6.4 billion — more than double the figure attached to the enterprise agentic control plane at the start of 2024. Backing for the round came from Evolution Equity Partners, joined by a mix of returning and newly added investors.

The capital raised is intended to support the company's next stage of development, with enterprise adoption of AI agents and broader changes to workplace processes driving the direction of that investment. According to the company, enterprises are reassessing how work is fundamentally structured, and Island positions itself as a tool that addresses gaps in oversight, governance, and audit capability that organisations face as AI adoption expands.

Richard Seewald, Founder and Managing Partner at Evolution Equity Partners, expressed the view that Island holds a distinctive position by being able to monitor and manage the interactions of both users and automated agents across applications and data, regardless of where those interactions take place, and that the company has demonstrated an ability to define a new product category, move customers away from older technologies, and drive changes in how they operate from the browser through to the network.

Prysm Capital, Sequoia Capital, Coatue Management, Cyberstarts, Insight Partners, and J.P. Morgan joined returning backers in the round, with Island's approach — spanning browser, endpoint, network, and data protection — described in the announcement as forming a foundational governance layer for enterprise computing as it moves into its next phase. The funding round also drew backing from Morgan Growth Equity Partners, Alta Park Capital, Georgian, G Squared, and Squarepoint, with cybersecurity entrepreneur Dmitri Alperovitch contributing a further personal stake, while the company's leadership described the moment as the start of an era in which humans and AI agents operate alongside one another.

Island's co-founder and chief executive, Mike Fey, noted that software agents — much like people — depend on appropriate context, defined boundaries, reliable access, and clear lines of accountability to function effectively, adding that the company developed a browser built from the ground up for enterprise environments, targeting the digital workspace where most professional activity now takes place.

Data protection and DLP capabilities came next, followed by construction of a next-generation SASE architecture built outward from the endpoint layer. Across security, productivity, and governance — wherever humans or automated agents operate — those combined capabilities provide technology leaders, security teams, and business unit owners with a single coordinating framework.

The company framed the funding as enabling expanded collaboration with clients on AI deployment at scale. Separately, Island reported a workforce of 1,000 and said its annual recurring revenue had doubled each fiscal year since the company began operating in 2022.

Island attributed ongoing revenue expansion to growing demand among enterprises for tools that accelerate AI integration, restructure networks around end users, reduce the complexity of security infrastructure, and keep sensitive data protected without creating additional barriers for users. That trajectory earned the company a place on CNBC's Disruptor 50 list for 2026.

Cyberstarts founder and general partner Gili Raanan noted that Island's progress from early-stage investment to a US$6.4 billion valuation, achieved alongside annual recurring revenue that has doubled each year, reflects what he described as a product the enterprise market requires as AI agents take on greater operational roles.

Frost & Sullivan, an industry analyst organisation, extended its 2026 Global Zero Trust Browser Security Company of the Year designation to Island following a review of the competitive landscape. Peer feedback gathered across the Gartner® Peer Insights platform placed Island among the Customers' Choice honourees within the Secure Enterprise Browsers category for 2026.

In positioning itself within the market, the firm put forward the term "Enterprise Browser" to name a product line that weaves security controls, access management, and workflow capabilities into the browser layer where most desk-based work takes place. That foundational reach has since extended into consumer browsers via a dedicated extension, alongside coverage spanning endpoints, applications, modern SASE architecture, and data environments.

Island's CTO and co-founder Dan Amiga argued that because agents span multiple layers of the technology stack — last-mile control, network, data, identity, and observability — effective oversight requires a control plane that ties all five together rather than addressing any one layer in isolation. The enterprise-facing governance layer that results from this architecture routes every step in a workflow through a shared policy engine and a single audit log, according to Amiga.

Taken together, these signals map out the full picture for a given system — the identity behind an action, the resources within reach, the data in play, the nature of the operation being performed, and whether that operation clears the threshold for approval. Through Island's Enterprise AI platform, organisations gain the ability to roll out AI tools at scale — spanning whatever mix of models, applications, or agents they select — while tracking the complete thread of activity as it unfolds.

The platform covers identity governance, access controls, defined data boundaries, human-approval workflows, and spending oversight, while maintaining a traceable log of activity spanning browsers, endpoints, cloud environments, and internal systems. A company representative noted that autonomous AI agents are expected to challenge security assumptions that network-based models have relied on for decades.

Alperovitch — who co-founded both Silverado Policy Accelerator, where he serves as chairman, and CrowdStrike, where he previously held the role of chief technology officer — argued that protective measures need to operate at the point where work actually takes place, so that defenders can monitor and interrupt harmful actions as they occur, adding that Island was built around that shift in approach, offering enterprises broad oversight and control without impeding AI workflows.