Browserbase is a platform from Browserbase, Inc. that runs web browsers in the cloud for AI agents and automation scripts. A cloud browser is a real web browser that runs on a provider's servers and is controlled by code instead of a person, so a program can open a page, click, log in and fill forms on sites that offer no API.
One API key gives access to several services. The Browser API creates, controls and observes browser sessions; a Search API finds relevant websites for a query; a Fetch API turns any URL into HTML, JSON or Markdown; Functions deploy agents to run on a schedule or on demand; and a model gateway gives access to the major language models. Scripts written with Playwright, Puppeteer or Selenium connect to the cloud browsers, and Browserbase also makes Stagehand, an open-source framework for browser agents. Thousands of sessions can run at the same time, and paid plans include CAPTCHA solving.
Browserbase is a hosted service with a free plan and monthly subscriptions that include browser hours; extra use is billed per browser hour, per search and per fetch.