OpenAI Agents SDK Alternatives
8 alternatives to OpenAI Agents SDK — free and paid AI coding tools covering similar jobs, with pricing and standout strengths.
AutoGen (AG2)
A multi-agent conversation framework where agents collaborate via message-passing, with group chat and code execution.
Claude Agent SDK
A toolkit for building custom agents on the same harness that powers Claude Code.
CrewAI
A Python framework for orchestrating role-playing AI agents as collaborating 'crews', plus event-driven flows.
Google ADK
Google's open-source, code-first framework to build, evaluate, and deploy AI agents. Python and Java, model-agnostic, deploys to Vertex AI Agent Engine.
Langchain
The provider-agnostic agent framework, post-1.0: a standard create_agent loop on the LangGraph runtime, middleware hooks, and the largest integration ecosystem.
LangGraph
A low-level library for building stateful, controllable agents as graphs, with checkpointing and human-in-the-loop.
Mastra
An open-source TypeScript framework for building AI agents, workflows, RAG, and tool-calling, with memory, model routing, and built-in observability.
Pydantic AI
Type-safe agent framework from the Pydantic team: validated structured outputs, dependency injection, durable execution, 'that FastAPI feeling.'