Island priced a $400 million Series F on September 24 at a $6.4 billion valuation, led by Evolution Equity Partners. Existing backers including Sequoia, Coatue, Insight, Cyberstarts, J.P. Morgan Growth Equity, and CrowdStrike co-founder Dmitri Alperovitch joined. That follows a March 2025 Series E at $4.8 billion; CTech puts ARR near $200 million with roughly 1,000 employees and eight of the world’s ten largest banks on the enterprise browser.
The pitch has shifted. Island still starts at the browser, but now sells an “agentic control plane”: one policy engine and one audit trail across browsers, endpoints, apps, networks, and data. Enterprise AI adds identity controls, guardrails, human approvals, and cost limits for agents — model-agnostic. CTO Dan Amiga’s line is the product brief: agents do not live in one stack layer, so they cannot be governed from one.