Quick answer

Browserbase provides cloud-hosted headless Chrome sessions for automation and AI agents, with proxies, stealth settings, captcha handling, and recordings for debugging. Stagehand, its open-source framework, adds three primitives on top of Playwright: act ("click the login button"), extract ("get the prices as JSON"), and observe. There is a free hobby tier; the Developer plan starts at $39 a month plus browser hours.

Ask any developer who has built a web agent what broke first and the answer is rarely the model. It is the browser: sessions dying, sites blocking automation, selectors breaking when a page changes. Browserbase exists to own that layer so you do not have to.

What you get

  • Managed Chrome sessions that start in about a second, with residential proxies and fingerprinting options
  • Session recordings and a live view, so you can watch what the agent did when a run fails
  • Works with Playwright, Puppeteer, and Selenium code you already have
  • Stagehand: natural-language actions that use a model to find the right element, which survives layout changes that break hard-coded selectors
  • Integrations with LangChain, CrewAI, and other agent frameworks

Stagehand is the interesting part

Traditional automation says "click the element with this CSS selector." Stagehand says "click the checkout button" and lets a model work out which element that is, then caches the result so the model is not called every time. The practical effect is scripts that keep working after a site redesign. The trade-off is cost and speed: each uncached action is a model call. Stagehand is open source and works without Browserbase, but the two are designed together.

Limits and costs

Pricing is a base subscription plus browser hours and proxy bandwidth, which climbs with scale; a fleet of agents browsing all day is not cheap. Sites with strong anti-bot systems still block sessions, and Browserbase is clear that complying with a site's terms is your job, not theirs. For pure data extraction at scale, Apify and Firecrawl are often more economical; Browserbase shines when an agent needs to interact, fill forms, and react.

Related reading

AI agent platforms in 2026 What is an agentic AI browser?

Bottom line

If your agent needs to use websites the way a person does, Browserbase removes the hardest infrastructure problem and Stagehand makes the automation resilient. If you just need data from pages, a scraping service is cheaper. Start on the free tier and watch the session recordings; they alone will teach you why browser infrastructure is a product.