Island raises $400M to govern AI agents from its enterprise browser

Island raises $400M to govern AI agents from its enterprise browser

24 September 2026: Island, whose enterprise browser lets companies control how staff use the web and business applications, has raised a $400 million Series F at a $6.4 billion valuation. Evolution Equity Partners led, with existing investors including Sequoia Capital, Coatue Management, Insight Partners and J.P. Morgan Growth Equity Partners, and a personal investment from the cybersecurity entrepreneur Dmitri Alperovitch.

Island says it will spend the money extending the browser into what it calls an "agentic control plane": controls over what an autonomous AI agent, rather than a person, may do across a company's devices, network, data and identity systems. The announcement gives no release date, so it describes a direction, not a product customers can buy today.

The company lists Pfizer, Chipotle, American Airlines and eight of the world's ten largest banks as customers, and says revenue is near $200 million and growing close to 100% a year. Those figures are Island's own.

Identity and access vendors are extending their products in the same direction. Buyers shortlisting tools for it should ask Island for a dated roadmap before counting the control plane as available. At the time of the round we had found no independent hands-on review of the agent features, and the existing browser product remains what customers are buying.

Sources

• Island: Island Announces $400 Million Series F, Bringing Valuation to $6.4 Billion, 24 September 2026
• SecurityWeek: Island Raises $400 Million at $6.4 Billion Valuation, 24 September 2026
• CTech/Calcalist: Island raises $400 million at $6.4 billion valuation as AI agents reshape enterprise security, 24 September 2026