Agent Frameworks

Libraries for building agents and AI apps.

#1
Vercel AI SDK free
TypeScript toolkit for AI apps and agents.
Best for: TS/Next.js builders
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#2
OpenAI Agents SDK free
Lightweight framework for multi-agent workflows.
Best for: Simple agents on OpenAI models
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#3
Claude Agent SDK free
The agent harness behind Claude Code as an SDK.
Best for: Agents that use tools and files like Claude Code
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#4
LangGraph free
Stateful, controllable agent orchestration.
Best for: Complex graphs with human-in-the-loop
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#5
Mastra free
TypeScript agent framework with workflows and memory.
Best for: Full-featured TS agents
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#6
CrewAI freemium
Framework for role-based multi-agent crews.
Best for: Multi-agent role-play pipelines
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#7
Pydantic AI free
Type-safe Python agent framework.
Best for: Python devs who love typing
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#8
LlamaIndex freemium
Framework for agents over your data.
Best for: RAG and document agents
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