LangChain / LangGraph
Frameworks for LLM apps and agents
MIT-licensed frameworks for LLM apps (LangChain) and stateful agent graphs (LangGraph), with LangSmith for tracing, evals and deployment.
Best for: Complex, stateful agent workflows in Python or JS
Visit LangChain / LangGraph ↗85
score / 100
- Pricing
- Frameworks free; LangSmith Plus $39/seat/mo
- Free tier
- Yes: MIT frameworks; LangSmith Developer 5K traces/mo
- Open source
- Yes
- Last verified
- 2026-10-15
Score breakdown
- Fit for the use case21 / 25
- Vibe-coder friendliness9 / 15
- Output quality & reliability12 / 15
- Pricing & free tier14 / 15
- Ecosystem & integrations10 / 10
- Momentum10 / 10
- Code ownership & lock-in9 / 10
Why this score: The largest ecosystem (~148k stars). The abstractions have a steep learning curve.
Based on desk research of official pricing pages and docs; see methodology.