Best Stagehand Alternatives in 2026

Browserbase provides managed cloud browser infrastructure for AI agents, pairing raw headless Chromium sessions with Stagehand, an open-source SDK that replaces brittle CSS selectors with natural language act(), extract(), and observe() primitives.

AgentQL is a natural-language query layer for the web, built by TinyFish. Developers write plain-English data queries instead of brittle CSS selectors, and AgentQL's AI engine resolves them against any live web page, returning typed structured data.

OpenHands is an open-source autonomous AI coding agent by All Hands AI. It plans, writes, executes, and debugs code inside a sandboxed environment without requiring manual approval at every step. Free to self-host; cloud tier available.

Vercel AI SDK is an open-source TypeScript toolkit for building AI-powered applications and agents. It provides a unified API across 20+ model providers, streaming UI hooks for React and Vue, structured output with Zod, and a full agent abstraction layer.

Firecrawl is a web scraping API by Mendable AI that converts websites into LLM-ready Markdown and structured JSON. Built for RAG pipelines, AI agents, and developer workflows. 113,000 GitHub stars, used by 80,000+ companies.

OpenAI's official open-source framework for multi-agent workflows. Launched March 2025 as the production successor to Swarm. Provides handoffs, guardrails, tracing, and voice agent support in Python and TypeScript.

PydanticAI is an open-source Python framework for building production-grade AI agents. Created by Samuel Colvin (creator of Pydantic), it brings FastAPI-style type safety, structured outputs, and dependency injection to agent development. Free, MIT-licensed, 16k+ GitHub stars.

smolagents is Hugging Face's open-source Python library for building AI agents that write code as actions rather than JSON tool calls. Apache 2.0, ~1,000 lines of core code, supports 100-plus LLMs including local models via Ollama and Transformers.

Mastra is an open-source TypeScript framework for building production AI agents, from the team behind Gatsby. It ships agents, durable workflows, RAG, built-in memory with SOTA LongMemEval scores, and a visual debugging studio.

Genkit is Google's open-source AI framework for TypeScript, Go, and Python developers. It provides typed flows, RAG, tool calling, and multi-agent support with a standout local Developer UI for iterating prompts and debugging traces. Free under Apache 2.0.