LlamaIndex vs LangChain / LangGraph
Which is better in 2025? An honest breakdown.
Expert's Verdict
LangChain / LangGraph wins overall with a 4.4/5 rating vs LlamaIndex's 4.2/5. But the right choice depends on your specific situation.
Choose LlamaIndex if:
- ✓ AI engineers
- ✓ data-heavy applications
- ✓ enterprise RAG builders
Choose LangChain / LangGraph if:
- ✓ AI/ML engineers
- ✓ backend developers
- ✓ enterprise dev teams
Feature Comparison
| Feature | LlamaIndex | LangChain / LangGraph |
|---|---|---|
| Rating | ⭐ 4.2/5 | ⭐ 4.4/5 |
| Pricing | freemium | freemium |
| Free Tier | ✓ Yes | ✓ Yes |
| Best For | AI engineers, data-heavy applications | AI/ML engineers, backend developers |
| Avoid If | non-developers | beginners |
| Top Use Case | rag-pipelines | build-ai-agent |
What is LlamaIndex?
LlamaIndex specializes in connecting data sources — PDFs, databases, APIs, code repos — to LLMs in a structured, queryable way. It's the gold standard for building RAG (retrieval-augmented generation) pipelines where accuracy and document fidelity matter. The core framework is open-source and free. LlamaCloud adds managed parsing and indexing as a service — free tier of 10,000 credits/month, with credits priced at $1 per 1,000.
What is LangChain / LangGraph?
LangChain is the most widely adopted framework for building LLM-powered applications — chains, retrieval-augmented generation (RAG), tool use, and agents. LangGraph, LangChain's stateful agent layer, has become the preferred choice for complex multi-step agent workflows with branching logic, cycles, and persistent state. Both are open-source and MIT-licensed. LangSmith, the observability platform, adds tracing, metrics, and evals — free tier covers 5k traces/month, Plus at $39/seat/month.
Frequently Asked Questions
Is LlamaIndex better than LangChain / LangGraph?
LangChain / LangGraph scores higher overall (4.4/5 vs 4.2/5). The framework most serious AI apps are built on. LangGraph is now the right default for stateful agents — skip LangChain alone for anything complex.
What is the main difference between LlamaIndex and LangChain / LangGraph?
LlamaIndex is designed for AI engineers and data-heavy applications, while LangChain / LangGraph excels for AI/ML engineers and backend developers.
Which is cheaper — LlamaIndex or LangChain / LangGraph?
LlamaIndex is freemium and has a free tier. LangChain / LangGraph is freemium and has a free tier.
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