AI Tools Lab
LangGraph
An open-source library for building agents as controllable graphs with memory and human approval steps.
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- What it is for
- Building agent workflows in code with explicit control over each step.
- Beginner friendly
- no
- Difficulty
- advanced
- Coding required
- required
- Where it runs
- windows, mac, linux
- Pricing model
- open source
- Free plan notes
- The official page describes LangGraph as an MIT-licensed open-source library that is free to use.
- Paid plan notes
- LangChain also offers a separate hosted platform (LangSmith). Its prices were not shown on the page we read, so check the official site.
- Account or API key needed
- None for the library. Model providers need their own API keys.
- Privacy considerations
- Agents you build may call tools and models with your keys. Keep keys in environment variables, never in code you share.
- Recommended before you start
- Python programming basics and a working Python install.
Prices and free plans change. We last checked this on 2026-10-15. Always confirm on the official site.
Guided labs
Guided labs for this tool unlock with the course, or are still being written.