Island, a Dallas-based enterprise cybersecurity company, has raised $400 million in Series F financing at a $6.4 billion valuation, more than doubling its valuation since 2024. The round was led by Evolution Equity Partners, with participation from existing and new investors, bringing Island’s total funding to approximately $1 billion.
The financing will support Island’s next phase of growth as it expands its enterprise security platform to help organizations govern both employees and AI agents across browsers, endpoints, applications, networks, and data.
Island initially developed its platform around the Enterprise Browser, embedding security, access controls, and productivity capabilities into the browser environment where employees conduct much of their daily work. The company has since expanded into data protection, data loss prevention, and secure access service edge (SASE) technology, creating a broader security and governance platform designed for increasingly automated workplaces.
The Series F included participation from 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 made another personal investment in the company.
The latest investment follows a period of substantial growth for Island, which launched in 2022 and now employs approximately 1,000 people.
The company reported that it has doubled annual recurring revenue during every fiscal year since its launch, reflecting growing enterprise demand for security infrastructure that supports traditional employee workflows alongside emerging AI applications.
Island’s expansion comes as organizations increasingly deploy autonomous AI agents capable of accessing applications, processing sensitive information, and executing business activities without continuous human involvement.
These systems introduce additional security and governance requirements because AI agents may interact with multiple applications, information repositories, networks, and enterprise systems while performing tasks.
Island’s technology is designed to provide organizations with a unified framework for controlling these activities, establishing access permissions, monitoring interactions, and maintaining accountability across human and AI-driven workflows.
Its approach extends beyond conventional browser security by combining capabilities across five critical areas: last-mile control, network security, data protection, identity, and observability.
Together, these components provide information about who or what is performing an action, which systems can be accessed, what information can be used, and whether specific activities should be permitted.
The platform applies a unified policy engine and audit trail across employee and AI agent activities, enabling enterprises to monitor work as it occurs rather than reconstructing security events after they happen.
Island’s broader platform also includes Enterprise AI, which allows organizations to deploy and manage artificial intelligence across different models, applications, and agents.
The offering provides identity governance, access management, operational guardrails, data boundaries, human approval processes, and cost controls.
These capabilities are designed to give organizations greater flexibility when adopting AI technology without requiring them to standardize on a particular model provider or AI application.
For security and technology executives, Island intends to consolidate several previously separate capabilities into a coordinated framework for enterprise computing.
The company’s platform now extends its original Enterprise Browser capabilities to consumer browsers through an extension, as well as endpoints, applications, networks, cloud environments, and internal resources.
By integrating these components, Island aims to reduce reliance on fragmented security infrastructure while giving businesses greater visibility into employee and AI agent activity.
The new funding will provide additional resources for product development, enterprise customer expansion, and continued investment in the company’s security architecture.
Island has also received industry recognition as its platform has expanded. The company was included in the 2026 CNBC Disruptor 50, recognized by Frost & Sullivan as its 2026 Global Zero Trust Browser Security Company of the Year, and named a Customers’ Choice in the 2026 Gartner Peer Insights Voice of the Customer report for Secure Enterprise Browsers.
The company reports that millions of users rely on its technology to protect sensitive information, support enterprise productivity, and simplify security operations.
With its latest financing, Island plans to continue expanding its enterprise security platform as organizations introduce AI agents into more operational workflows. The company is positioning its technology as a common governance layer for human and AI activity, combining security, productivity, and auditing capabilities across the enterprise.
KEY QUOTES:
“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. Island created the first Enterprise Browser to protect the primary place people work. From there, we expanded into data protection and DLP, then built a next-generation SASE architecture from the endpoint outward. Those combined capabilities give CIOs, CISOs, and business unit owners one security, productivity, and governance framework for everywhere human and agentic work occurs. This investment gives us even more capacity to innovate with our customers and help them safely scale AI.”
Mike Fey, CEO And Co-Founder Of Island
“Enterprises are rethinking the basic architecture of work. Island meets the moment with a unique advantage: it can see and govern what people and agents are doing as they interact with applications and data, wherever that happens.”
Richard Seewald, Founder And Managing Partner At Evolution Equity Partners
“Agents do not operate in a single layer of the technology stack, so they cannot be governed from one. Island’s control plane unifies five critical layers: last-mile control, network, data, identity, and observability. Together, they tell the enterprise who or what is acting, what it can reach, what data it can use, what it is doing, and whether that action should be allowed. This lets organizations see the full chain of activity and govern it in real time, not reconstruct it after the fact.”
Dan Amiga, CTO And Co-Founder Of Island
