Browser Company Island Doubles Valuation With Push to Govern AI Agents

Browser Company Island Doubles Valuation With Push to Govern AI Agents

The company behind the "enterprise browser" platform is now valued at $6.4 billion — more than double its 2024 level. The capital will fund a push to control both humans and AI agents from the same place, but key figures remain independently unverified.

Island announced a $400 million Series F round on September 24, 2026, valuing the company at $6.4 billion — more than double its 2024 level. The round was led by Evolution Equity Partners, with participation from both existing and new investors, according to the company's press release (AIwire).

The round marks a clear repositioning: Island, which started out as a vendor of a secured browser for employees, is now selling itself as a governance and security layer for both humans and AI agents. That is the story investors are paying for — in a market where demand for tools to control autonomous AI agents is growing fast, competitors lined up throughout the year, and the debate over AI regulation in Washington remains unresolved.

From secured browser to a control plane for AI agents

Island's original product was an enterprise browser: a work browser in which the company controls identity, access and data flows for employees. The new Enterprise AI product builds on the same logic, but targets AI agents. According to The Next Web, the product adds identity controls, security guardrails, human approvals and cost limits for agents — and it works regardless of which AI models the customer chooses.

The mechanism, in other words, is not building its own agent or model, but sitting between the agent and the company's systems: who the agent acts as, what it is allowed to do, when a human must approve, and how much it can cost. That makes the company model-agnostic — an advantage in a market where businesses switch between model vendors.

The competition is already in the field

Island is not alone in positioning itself in this space. According to TNW, Palo Alto Networks has an enterprise browser through its 2023 acquisition of Talon, Cloudflare has launched an agent browser, Anthropic offers data-loss-prevention (DLP) add-ons in Claude Enterprise, and the startup Neo came out of stealth in July with $100 million in capital.

That means the Series F round is both a boost and a necessity: the $400 million will among other things fund research and development and expansion into Europe, Asia and the Middle East. CEO Mike Fey told CNBC that the company plans to grow its workforce from 1,000 to 1,500 employees by the middle of next year.

What is confirmed — and what is not

The press release contains no revenue figures. Island claims its annual recurring revenue (ARR) has doubled every fiscal year since its 2022 launch, but gives no sum. TNW writes that Calcalist's CTech has reported ARR of roughly $200 million — a company-adjacent secondary figure that neither Island nor independent sources have confirmed.

Earlier rounds are also dated differently across sources. The Times of Israel dates the previous round of $250 million to May 2025, while TNW says March 2025. The valuations of $4.8 billion in that round and $3 billion in the round two years earlier, however, are consistent across sources. The company's total funding is given as $1.2 billion by The Times of Israel — but that figure has not been independently confirmed.

The $6.4 billion valuation itself is the company's own disclosure; no financial filings confirm the terms of the round.

Customers and roots

CNBC reports that Island, ranked No. 28 on this year's Disruptor 50 list, counts among others Pfizer, Chipotle, American Airlines and major banks as customers. The customer list, however, is based largely on the company's own statements and is not independently verified.

Island was founded in 2020 by Dan Amiga, a veteran of the Israeli military's 8200 unit and a serial entrepreneur, and Mike Fey, former president of Symantec. The company is based in Dallas but has a substantial research presence in Israel: 400 of its 1,000 employees work at the development center in Tel Aviv, The Times of Israel reports.

In addition to Evolution Equity Partners, Prysm Capital, Sequoia Capital, Coatue Management, Cyberstarts, Insight Partners and J.P. Morgan Growth Equity Partners participated in the round. CrowdStrike co-founder Dmitri Alperovitch also took part, according to The Times of Israel.

Why now

The round comes at a moment when concern about AI agents acting outside of control is growing, and the debate over AI regulation in Washington is ongoing across party lines, CNBC writes. For companies already deploying autonomous agents, the question is not whether to govern them but how — and Island's bet is that this governance should happen in the same layer as the company's existing identity and security controls for humans.

What remains to be seen

The open questions are primarily financial and commercial: the ARR figure of roughly $200 million is unconfirmed, the exact dating of earlier rounds varies between sources, and the terms of the Series F round rest on the company's own disclosures. At the same time, the underlying trend the company is betting on — that businesses need a common control plane for humans and AI agents — is well documented through competitors' launches and the investor interest in the round.