Agent frameworks & platforms / Framework
LangChain / LangGraph
Open-source framework for LLM apps and stateful agents
Good for
Custom agents · RAG
- Free tier
- Yes — page says: “$0 / seat per month then pay as you go Start for free Up to 5k…”
- Skill level
- advanced
[OK] checked 2026-10-15 on the official site
Get started
- Open the official site: https://www.langchain.com
- Start on the free tier to test it on your task.
- Try it on your real task before committing.