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

Israeli cybersecurity company Island announced Thursday it has raised $400 million in a new funding round, valuing the company at $6.4 billion. This valuation represents a significant increase from its previous funding round in March 2025, when it raised $250 million at a $4.8 billion valuation.

The funding round was led by Evolution Equity Partners, with participation from existing investors including Sequoia Capital and Insight Partners. Island, founded by CEO Mike Fey and CTO Dan Amiga, pioneered the enterprise browser category in 2020, integrating security and control tools for employee activity.

The company has expanded its platform to monitor the activities of artificial intelligence (AI) agents within organizations. Fey emphasized the need for oversight, stating, "AI agents, just like human employees, need permissions, boundaries, and accountability to operate safely within an organization."

Island employs approximately 1,000 people globally, with 400 staff at its development center in Tel Aviv. Amiga is an alumnus of Unit 8200, and Fey previously served as president of Symantec. The company's growth has been compared to that of Talon, another enterprise browser firm founded around the same time, which was acquired by Palo Alto Networks for approximately $625 million in 2023.