Israeli Cybersecurity Firm Island Raises $400 Million at $6.4 Billion Valuation

Israeli cybersecurity firm Island has announced a successful Series F funding round, securing $400 million at a valuation of $6.4 billion. This valuation more than doubles the company's previous valuation of approximately $3 billion from April 2024 and significantly surpasses the $4.8 billion valuation from a $250 million round in March 2025. The latest funding round was led by Evolution Equity Partners, with participation from Prism Capital, Cyberstarts, Sequoia Capital, Coatue Management, Insight Partners, J.P. Morgan Growth Equity Partners, Alta Park Capital, Georgian, G Squared, and Squarepoint. Dmitri Alperovitch, co-founder of CrowdStrike, also made a personal investment.

Founded in 2020 by CEO Mike Fey and CTO Dan Amiga, Island initially focused on an enterprise browser designed to integrate security, access control, data management, and user activity monitoring directly into the workflow. The company has experienced rapid growth, expanding its workforce from around 250 employees in April 2024 (about 150 in Israel) to approximately 1,000 employees today, with about 400 based at its development center in Israel. Business operations have also surged, with customer numbers growing from over 200 a year prior to about 450 by March 2025, and its annual recurring revenue reportedly doubling each year since its commercial launch.

Island's product offering has evolved beyond its initial enterprise browser. While the Chromium-based browser controls access to applications and data, the company has expanded to include browser extensions, endpoint agents, and network security capabilities. Its platform is now being positioned around working with AI agents, enabling organizations to set permissions and access controls even when AI agents perform automated tasks. This strategic shift broadens Island's target market from enterprise browsers to a more comprehensive security and control layer.

The cybersecurity market has become increasingly competitive since Island's launch. Israeli competitor Talon, which developed a similar secure browser, was acquired by Palo Alto Networks for approximately $625 million in 2023. Other major software and security companies offer competing functionalities. Despite the competition, investment in Israeli cybersecurity firms continues to rise, with companies like Cyera raising substantial funds. Island's current funding round places it among a select group of Israeli private cybersecurity companies valued in the billions, adding about $1.6 billion to its valuation since the previous round.

Island also completed a secondary transaction in 2025 worth hundreds of millions of dollars, allowing early investors and employees to sell some of their holdings. The new capital will fuel further product development and commercial expansion, maintaining a significant development presence in Israel while growing its global customer base.