Texas-Based Island Raises $400M in Series F at $6.4 Billion Valuation

The round also saw participation from Prysm Capital, Sequoia Capital, Coatue Management, Cyberstarts, Insight Partners, J.P. Morgan Growth Equity Partners, Alta Park Capital, Georgian, G Squared, Squarepoint, and Dmitri Alperovitch.

The company will use the new funding to support its next phase of growth, scale its agentic control plane and expand its security, productivity, and governance capabilities across browsers, endpoints, networks, and data.

What is Island?

Island provides an Enterprise Browser and agentic control platform that helps companies manage how employees and AI agents work across browsers, devices, applications, networks, and data.

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The company started by building security, access, and productivity controls directly into the browser, where much of modern knowledge work takes place. It has since expanded its platform to cover endpoints, applications, modern SASE, data, and consumer browsers through an extension.

Island's platform gives enterprises tools to manage identity, access, security guardrails, data boundaries, human approvals and costs. It also provides an audit trail across browsers, endpoints, cloud environments, and internal resources.

The platform is designed to help organizations deploy AI while maintaining control over which models, applications, and agents can access business systems and sensitive information.

How Much Funding Has Island Raised?

Island has raised $400 million in its Series F funding round.

The latest round values the company at $6.4 billion. The source does not provide Island's total funding raised across all rounds.

Island launched in 2022 and has doubled its annual recurring revenue every fiscal year since then.

Who Invested in Island’s Series F?

The Series F round was led by Evolution Equity Partners.

Other investors included Prysm Capital, Sequoia Capital, Coatue Management, Cyberstarts, Insight Partners, J.P. Morgan Growth Equity Partners, Alta Park Capital, Georgian, G Squared, Squarepoint, and Dmitri Alperovitch.

Why the Funding Matters

Island plans to use the funding to scale its agentic control plane and expand its capabilities across security, productivity, and governance.

The company is also focused on helping enterprises manage AI adoption across browsers, endpoints, networks, applications, and data. Its platform provides controls such as identity governance, access management, data boundaries, human approvals, cost controls, and auditing.

Who founded Island?

Island was founded in 2020 by Michael Fey and Dan Amiga.

The company is headquartered in Dallas, Texas, and currently employs 1,000 people.

Leadership Comments

“AI agents will break many of the assumptions that have supported network-based security for decades. Security has to move to where the work actually happens, giving defenders the visibility to detect and stop dangerous actions in real time,” said Alperovitch, Co-founder and Chairman of Silverado Policy Accelerator and Co-founder and former CTO of CrowdStrike.

“We’ve entered a new era in which people and AI agents work side by side. Just like humans, agents need the right context, access, guardrails, and accountability to succeed,” said Mike Fey, CEO and Co-founder of Island. “Island created the first Enterprise Browser to protect the primary place people work.

Market and Business Growth

Island has doubled its annual recurring revenue every fiscal year since its launch in 2022.

The company now employs 1,000 people and says its growth is being driven by enterprise demand for AI adoption, redesigned networks, simpler security infrastructure, and protection of sensitive data.

Island has also received several industry recognitions. It was included on the CNBC Disruptor 50 list for 2026 and was recognized by Frost & Sullivan as the 2026 Global Zero Trust Browser Security Company of the Year.

The company was also named a Customers’ Choice in the 2026 Gartner Peer Insights Voice of the Customer for Secure Enterprise Browsers.

What Happens Next?

Island plans to use the new capital to scale its agentic control plane and continue expanding its platform across browsers, endpoints, networks, applications, and data.

The company will also continue developing tools that help enterprises govern AI agents and employees through identity controls, access policies, security guardrails, cost management, human approvals and auditability.

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