# Island cybersecurity funding and valuation increase

> Live situation record from CLSTR: https://clstr.news/situations/island-cybersecurity-funding-and-valuation-increase
> Updated: 2026-09-26T22:05:00.000Z. Sources: 10. Developments: 2.

Island, a Dallas-based cybersecurity company, has closed a $400 million Series F funding round led by Evolution Equity Partners. This investment brings the company’s total valuation to $6.4 billion, an increase of $1.8 billion from its previous $4.6 billion valuation.

The company intends to use the capital for product development and expansion, including a goal to hire 500 employees by mid-2027. Island’s platform utilizes a Chromium-based enterprise browser to secure cloud applications through features such as phishing prevention and session termination for insecure devices.

Recent developments include the expansion of its capabilities to provide security for AI agents, allowing organizations to monitor AI tools, servers, and extensions used by employees while mitigating risks like prompt injection.

## Timeline

### 2026-09-26: Island raises $400 million at $6.4 billion valuation

Island raised $400 million in Series F funding, reaching a $6.4 billion valuation to expand its enterprise browser and AI agent security solutions.

3 sources. https://clstr.news/cluster/island-raises-400-million-at-64-billion-valuation

### 2026-09-24: Island raises $400 million at $6.4 billion valuation

Cybersecurity firm Island raised $400 million in Series F funding, reaching a $6.4 billion valuation to expand its enterprise browser and AI governance platform.

7 sources. https://clstr.news/cluster/island-raises-400-million-in-series-f-funding-at-64-billion-valuation

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Cite as: Island cybersecurity funding and valuation increase. CLSTR, https://clstr.news/situations/island-cybersecurity-funding-and-valuation-increase