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Alternatives to Claude Agent SDK (Python)

Claude Agent SDK (Python) is published by Anthropic. Its tagline says it runs the Claude Code agent loop inside your own program, with custom tools and hooks written as Python functions. It is MIT licensed, has 7,924,764 weekly downloads, and its repository has 8,342 stars. LlamaIndex, the first entry, is the closest match. On adoption, LangChain (37,334,710 weekly downloads) and LangGraph (13,114,431) are both ahead of the SDK, while CrewAI has 644,597. AutoGen carries a CC-BY-4.0 license and is described as an archived Microsoft framework; Microsoft directs new users to Microsoft Agent Framework. Google Agent Development Kit (ADK) is Apache-2.0 and is described as model-agnostic though tuned for Gemini. The list is ordered by closeness of match and our rank. Money never changes it.

Updated Oct 26, 2026 · Built from catalog data; how we rank and grade

You're replacing

Claude Agent SDK (Python)

Python SDK that runs the Claude Code agent loop inside your own program, with custom tools and hooks written as Python functions.

12 alternatives

Ordered by how closely each matches Claude Agent SDK (Python) (shared product, category or stated alternative) and by rank.

  1. 1
    LlamaIndex

    LlamaIndex

    Open-source Python toolkit for RAG and agents over your own data, with event-driven workflows and 300+ integration packages.

    • More GitHub stars (52.6K)

    ★ 52.6K↓ 1.4M/wkLast active Oct 14, 2026Compare →

  2. 2
    LangChain

    LangChain

    Python framework of interoperable components and integrations for building agents and LLM apps, with LangGraph and Deep Agents layered above it.

    • More GitHub stars (148.4K)

    ★ 148.4K↓ 37.3M/wkLast active Oct 24, 2026Compare →

  3. 3
    LangGraph

    LangChain

    Low-level Python orchestration framework for long-running stateful agents, with durable execution, human review points and short- and long-term memory.

    • More GitHub stars (43.8K)

    ★ 43.8K↓ 13.1M/wkLast active Oct 24, 2026Compare →

  4. 4
    CrewAI

    CrewAI

    Open-source Python framework for multi-agent workflows, with role-based Crews and event-driven Flows.

    • More GitHub stars (60.1K)

    ★ 60.1K↓ 644.6K/wkLast active Oct 24, 2026Compare →

  5. 5
    AutoGen

    Microsoft

    Archived Microsoft Python framework for multi-agent apps; Microsoft directs new users to Microsoft Agent Framework.

    • More GitHub stars (61.5K)

    ★ 61.5K↓ 89K/wkLast active Oct 16, 2026Compare →

  6. 6
    Google Agent Development Kit (ADK)

    Google

    Open-source toolkit for building, evaluating and deploying agents in Python, TypeScript, Go, Java and Kotlin, tuned for Gemini but model-agnostic.

    • More GitHub stars (22K)
    • Supports TypeScript and Go

    ★ 22K↓ 2.4M/wkLast active Oct 24, 2026

  7. 7
    OpenHands Software Agent SDK

    OpenHands

    Python and TypeScript SDK and REST Agent Server for building agents that work with code in local or containerized workspaces.

    • Supports TypeScript

    ★ 1.3K↓ 886.1K/wkLast active Oct 24, 2026

  8. 8
    antigravity-sdk-python

    google-antigravity

    Python SDK for building agents on Google Antigravity and Gemini, with the agent loop handled by the runtime.

    • 3.8K GitHub stars
    • Active in the last 30 days

    ★ 3.8K↓ 126.5K/wkLast active Oct 13, 2026

  9. 9
    Claude Agent SDK (TypeScript)

    Anthropic

    TypeScript SDK that gives programs Claude Code's built-in tools for reading, editing and running code, installed from npm.

    • Supports TypeScript

    ★ 1.8K↓ 8.1M/wkLast active Oct 23, 2026

  10. 10
    Microsoft Agent Framework

    Microsoft

    Open framework for building and hosting production-grade AI agents and multi-agent workflows in .NET and Python.

    • Supports C# and Go

    ★ 14.3K↓ 47.6K/wkLast active Oct 24, 2026

  11. 11
    python-utcp

    universal-tool-calling-protocol

    Official Python implementation of the Universal Tool Calling Protocol, calling HTTP, CLI, MCP and text-file tools through plugins.

    • Open source (MPL-2.0)
    • For Python

    ★ 653↓ 1.9K/wkLast active Sep 16, 2026

  12. 12
    Agent SDK Go

    Ingenimax

    Go framework for AI agents with memory, tool execution, MCP, agent skills, multi-agent patterns and evaluation.

    • Supports Go

    ★ 640Last active Oct 8, 2026

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