Picks / Agent frameworks & platforms
Best open-source AI agent framework
One pick, one backup, real prices from our database. Rankings are not for sale.
The pick
CrewAI
CrewAI lets you define a team of agents (roles, goals, tools) in a few lines of Python and have them work through a task together. It's the fastest open-source way to get a multi-agent workflow running, and it stays readable as your project grows.
- Starting price
- Not verified — check current price
- Free tier
- Not verified — check the official site
- Skill level
- intermediate
Last verified: 2026-10-15
Setup guide
- pip install crewai.
- Define 2-3 agents with a role, goal and tools.
- Define the tasks and assign them to agents.
- Create a Crew and kick it off.
- Add logging and tests before you ship it.
Backup pick
LangChain / LangGraph
Open-source framework for LLM apps and stateful agents. Good for: Custom agents · RAG.
- Starting price
- Not verified — check current price
- Free tier
- Yes — page says: “$0 / seat per month then pay as you go Start for free Up to 5k…”
- Skill level
- advanced
Last verified: 2026-10-15
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