Browserbase Raises 40 Million Series B as Demand for AI Web Automation Accelerates

Browserbase has secured $40 million in fresh funding to expand its web automation platform beyond developers, as demand surges from AI startups and enterprises alike. The Series B round, led by Notable Capital with participation from existing investors CRV and Kleiner Perkins, values the company at $300 million, nearly four times its valuation during its last raise in September. Founded just 16 months ago by Paul Klein IV, the San Francisco-based startup has quietly become a critical layer for companies building AI agents and automating workflows at scale. Its infrastructure spins up thousands of “headless browsers” browsers without a user interface to let software, not humans, navigate websites, click buttons, and retrieve data. This architecture allows Browserbase’s clients