Island raises $400M at $6.4B as agent governance becomes a security category, and Cyera adds a $400M extension
Island (corroborated by SiliconANGLE and Crunchbase News)·medium signal
Enterprise-browser maker Island closed a $400M Series F led by Evolution Equity Partners, with J.P. Morgan and Sequoia also in the round, at $6.4B, up 33% from its March 2025 round. It now pitches itself as an 'agentic control plane' for governing people and AI agents. Crunchbase ranks it alongside Cyera's $400M Series G extension (total raised $2.7B) for data security covering humans and agents as the week's two largest rounds.