Stagehand

Open Source

An open-source SDK built on top of Playwright that adds three AI primitives — act, extract, observe — plus an agent mode for autonomous multi-step workflows. Maintained by Browserbase. Sits between brittle scripted automation and unpredictable full-agent solutions, letting developers choose per step whether to use precise code or natural-language instructions.

Visit website GitHub

Pricing

Free / Open source

Type

Automation

Languages

TypeScript, Python

// VERDICT

Reach for Stagehand when you want to combine reliable coded browser automation with AI-driven steps for the brittle parts. Skip it when you want fully deterministic scripts (Playwright) or a no-code pure agent (Browser Use).

Best for

An AI browser-automation framework (from Browserbase) that blends natural-language actions with code - letting you mix Playwright-style determinism with AI steps like act/extract/observe.

Avoid when

You want purely deterministic scripted automation, or a pure LLM agent with no code, or you can't send page context to an LLM.

CI/CD fit

Built on Playwright · AI + deterministic steps · runs on cloud browsers

Languages

TypeScript · Python

Team fit

Automation engineers adding AI · QA building resilient web automation · Teams blending code + agents

Setup

Medium

Maintenance

Low

Learning

Intermediate

Licence

Free / Open source

// BEST FOR

Mixing coded (Playwright) steps with AI act/extract/observe
Making brittle selectors more resilient via AI
Natural-language actions where scripting is painful
Structured data extraction from pages
Running on managed cloud browsers (Browserbase)
Keeping determinism where it matters, AI where it helps

// AVOID WHEN

You want purely deterministic scripts (Playwright)
A no-code pure agent fits better (Browser Use)
You can't send page context to an LLM
Stable, fully repeatable runs are mandatory
AI step cost/latency is prohibitive
You won't review AI-driven steps

// QUICK START

npm install @browserbasehq/stagehand   # built on Playwright
// mix coded steps with AI: page.act('click login'), page.extract(...),
// page.observe(...); run locally or on Browserbase. Review AI steps.

// ALTERNATIVES TO CONSIDER

Tool	Choose it when
Playwright	You want fully deterministic scripted automation.
Browser Use	You want a no-code, pure-agent approach.
Browserbase	You need the managed cloud browsers underneath.

// FEATURES

act() — perform natural-language actions like 'click the submit button'
extract() — pull structured data from any page with Zod schema validation
observe() — surface what's actionable on a page before committing to an action
agent() — run multi-step workflows autonomously when end-to-end execution is needed
Action caching to convert AI-discovered steps into repeatable scripts

// PROS

Hybrid model — write Playwright code where you need precision, natural language where you need resilience
Self-heals to UI changes without rewriting selectors
Works locally with any Chromium browser; production-deploys to Browserbase with no code change

// CONS

LLM cost at scale — 10,000 extractions per day runs $50–200/day in model fees alone
Per-run reliability still trails scripted Playwright on common tasks (89% vs 92% in published benchmarks)
TypeScript and Python only — no Java, C#, or Ruby support