A comparison of mainstream Agent development frameworks!
How to choose among so many Agent development frameworks?
Personal daily heavy coding / research on open source projects: you can try Pi Agent AI SaaS or enterprise-level agent: OpenAI Agents SDK + LangGraph for more stable knowledge base/RAG: LlamaIndex + LangGraph structured business agent: Pydantic AI.
You do quick demos and content-based multi-agent: CrewAI