Stagehand

StagehandSince 2026-02

Stagehand is an AI-native browser automation SDK for TypeScript and Node.js created by Browserbase. It provides simple, high-level primitives (act, extract, and observe) that turn fragile CSS/XPath selectors into resilient natural language actions powered by frontier LLMs. By integrating directly with Playwright, Stagehand allows developers to mix standard deterministic browser code with dynamic AI-driven actions, creating test suites and automation scripts that never break when CSS classes or DOM hierarchies change.

Stagehand uses hierarchical DOM filtering to send compact accessibility trees to LLMs, keeping latency low and execution deterministic. Its extract method parses unstructured page contents directly into Zod schemas, while act executes complex multi-step user actions like selecting dates in dynamic calendar pickers. Stagehand can run locally on standard Playwright instances or scale horizontally across Browserbase's managed browser cloud with anti-bot bypass and session recording.

Browser UseSince 2026-01

Browser Use is an open-source Python library that connects LLMs to browser automation pipelines, enabling AI agents to navigate websites, interact with dynamic DOM elements, bypass multi-step forms, and extract structured data autonomously. Built on top of Playwright and LangChain, it provides vision-augmented element detection and deterministic state tracking. Unlike traditional headless scrapers, Browser Use feeds DOM tree snapshots and viewport screenshots to multimodal models like Claude 3.7 Sonnet or GPT-4o, allowing agents to understand complex UI layouts, handle popups, solve interactive workflows, and execute sequential tasks in plain English.

Browser Use utilizes an innovative DOM accessibility tree pruning algorithm to minimize token consumption while maintaining complete interactive context. The library exposes clean async Python primitives, custom action handlers, and persistent session cookies, making it ideal for automating authentication-heavy corporate portals, booking workflows, and complex SaaS configurations. The agent logs every click, keystroke, and reasoning trace, allowing developers to inspect execution replays and enforce security sandboxing before dispatching production workflows.