Browserbase

Programmable browsers for AI agents

Browserbase is a San Francisco AI infrastructure company focused on making the web usable by software agents. Its platform provides browser-as-a-service sessions plus search and fetch APIs so agents can navigate interactive websites, authenticate, extract data, and complete web workflows where ordinary APIs are missing. The company positions its product as a bridge between AI systems and the live web. Browserbase highlights use cases such as autonomous research, QA checks, price monitoring, form filling, data movement, and workflows that require logged-in browser sessions. Its own site says the product is used by thousands of companies building agentic web automation. Public funding coverage says Browserbase was founded by Paul Klein IV and raised a $40 million Series B in 2025, bringing total funding to roughly $67 million. For OpenTools, Browserbase is an important parent organization because its Stagehand and browser infrastructure products are common building blocks for AI agents that need reliable web access.