What are the best alternatives to Claude Agent SDK?

The top alternatives to Claude Agent SDK are LangChain, OpenAI Agents SDK, Browser Use, ranked by real usage data on Unfragile.

Are there free alternatives to Claude Agent SDK?

Yes, 17 free alternatives to Claude Agent SDK exist, including LangChain, OpenAI Agents SDK, Browser Use.

20 alternatives ranked by real usage data. Claude Agent SDK scores 86/100 — 1 tool score higher.

Anthropic's official agent SDK — the Claude Code harness (tools, MCP, subagents, permissions) as a library.

20 alternatives

17 free options

1 score higher

Framework for building LLM apps — chains, agents, RAG, memory. Python & JS/TS. 200+ integrations.