By Jay Park, Kerry Wei, Kristen Meredith
The browser has quietly become the operating system of the modern enterprise.
As work has migrated to the cloud, the browser is where employees access applications, collaborate, and move sensitive data. A whole day of work can now take place within a single browser tab.
Analysts report that approximately 85% of the workday now occurs in the browser, which makes it one of the most concentrated points of risk for the enterprise. Yet despite this shift, many organizations continue to run critical operations on browsers built for a mass consumer market—not for the high-stakes requirements of enterprise cybersecurity.
Enterprises have retrofitted these consumer browsers with various security tools—VPNs, DLP, and a growing stack of browser add-ons. But this approach has increasingly proven inadequate. More than 1 in 3 sensitive data leaks now involve a consumer browser. Meanwhile, this patchwork of solutions becomes increasingly slow and clunky for the end user.
Enter Island—A Browser Built for the Enterprise
When we met Mike Fey and Dan Amiga in 2022, Island had just emerged from nearly two years in stealth.
We were struck by Mike and Dan’s clarity of vision and execution. They hit the market running with a category-defining enterprise browser solution. Island embedded enterprise-grade security and management features directly into the browser. And because Island was built on Chromium—the open-source foundation of the major consumer browsers—working in Island was intuitive and seamless for end users.
As we tracked Island in its early days, we observed how Island’s enterprise browser greatly resonated with customers. Island rapidly gained go-to-market traction, winning blue-chip customers across financial services and healthcare. Notably, several customers had already expanded beyond their initial contracts, opting to deploy Island more broadly across their organizations once they had seen the browser in action. Enterprises were clearly eager and ready to adopt a purpose-built browser solution, and Island was positioned as the leader of this market. We led Island’s $100 million Series C in 2023 at this key inflection point. With clear product-market fit, the question was not if, but how quickly Island’s browser could become the gold standard workspace for the enterprise. What we saw in the months that followed reinforced our conviction. As threat landscapes evolved and browser-based work expanded, Island’s platform proved essential—not just helpful. We doubled down in Island’s Series D and in their March 2025 Series E, which valued the company at $4.8 billion.
Why This Fits Our Thesis
At Prysm, we partner with founders and management teams who are disrupting industries and building category-leading companies.
Island embodies that vision, fundamentally rethinking the browser as a core system of work. From the company’s early days, Island’s product, combined with its vision and the team’s technical capabilities, offered a roadmap to a comprehensive cybersecurity platform for the enterprise.
The Team and the Path Ahead
Mike Fey and Dan Amiga bring exactly the right background for this challenge. Both are cybersecurity veterans who previously built and sold successful security companies. They understand the enterprise buying cycle, the technical complexity of browser architecture, and—most importantly—how to build products that security teams trust and users actually want to use.
Their experience matters now more than ever as the browser has become the operating system of the modern enterprise. As organizations’ workflows increasingly run through the browser, their attack surfaces have expanded in lockstep. Bad actors have been some of the fastest adopters of AI, deploying phishing attacks that are increasingly sophisticated and personalized.
At the same time, enterprises racing to deploy AI and agentic solutions face a different but equally serious internal risk: secrets and data leaking into models, autonomous agents operating without proper guardrails, and new threats emerging weekly.
Island is purpose-built for this moment, as the only browser designed from the ground up to defend against sophisticated cyber attacks and enable enterprises to adopt AI with speed and certainty.
We’re proud to support Mike, Dan, and the Island team as they define what the enterprise browser looks like in the next era of work.
Disclaimer: For informational purposes only. Not an offer of any securities or of the investment advisory services of Prysm Capital, L.P. References in this piece are provided solely for illustrative purposes to highlight aspects of Prysm Capital’s investment approach and do not purport to represent all investments made by Prysm Capital. Past performance is not indicative of future results.