Capitalizing on Fear: AI Startup Island Raises $400M to Protect Businesses from Autonomous Agents

The cybersecurity market is rapidly adapting to a new reality where the main hackers are not humans, but neural networks. On September 24, 2026, the specialized startup Island closed a $400 million Series F investment round, bringing its valuation to a colossal $6.4 billion.

The company, which initially developed an enterprise browser, made a hard pivot toward controlling and isolating autonomous AI agents. Amid an epidemic of hacks (from Hugging Face servers to Australian government databases), the enterprise sector has realized the total vulnerability of its IT infrastructure. Investing in Island is a pure macroeconomic hedge. The B2B market understands that traditional antiviruses are useless against cognitive scraping and exploits generated on the fly. Corporations are willing to burn billions of dollars to build new software barriers just to keep third-party algorithms away from their internal data and trade secrets.

Source: Island / Reuters