LangChain vs LlamaIndex: Which is Better in 2026?
Choosing between LangChain and LlamaIndex? Both are popular agent framework tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.
Quick verdict
Both LangChain and LlamaIndex are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.
LangChain vs LlamaIndex — Side by Side
| LangChain | LlamaIndex | |
|---|---|---|
| Category | Agent Framework | Agent Framework |
| Pricing | Free · paid from $39/mo | Free |
| Starting price | Free tier available | Free tier available |
| Free tier | ||
| Rating | 4.5 | 4.5 |
| Best for | Agent Framework — ai, llm | Agent Framework — ai, llm |
Pros & Cons
- Largest ecosystem & integrations
- Free open-source core
- Python and TypeScript
- LangSmith for observability
- Abstractions can feel heavy
- Fast-moving API surface
- Excellent RAG tooling
- Strong document parsing (LlamaParse)
- Open-source
- Many data connectors
- Overlaps with LangChain (choose one)
- Cloud features usage-priced
Key Features Compared
LangChain
- Free open-source framework
- Python & JS/TS
- Huge integration ecosystem
- Chains, tools, memory, RAG
LlamaIndex
- Free open-source framework
- Best-in-class RAG primitives
- Data connectors & query engines
- Python & TypeScript
Choose LangChain if…
- You want a free tier to validate before paying.
- Largest ecosystem & integrations
- Free open-source core
- Python and TypeScript
Choose LlamaIndex if…
- You want a free tier to validate before paying.
- Excellent RAG tooling
- Strong document parsing (LlamaParse)
- Open-source
Frequently Asked Questions
Is LangChain better than LlamaIndex?⌄
Both LangChain and LlamaIndex are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.
What is the difference between LangChain and LlamaIndex?⌄
LangChain — The most popular open-source framework for building LLM apps and agents, with LangSmith for observability. LlamaIndex — Open-source data framework for RAG and agents — connect LLMs to your data, with LlamaCloud for managed pipelines. Both are agent framework tools; the comparison table above breaks down pricing, free tiers, and what each is best for.
LangChain vs LlamaIndex: which is cheaper?⌄
LangChain pricing: Free · paid from $39/mo. LlamaIndex pricing: Free. Confirm current pricing on each tool's official site, as plans change.
Which is rated higher, LangChain or LlamaIndex?⌄
In our catalog, LangChain rates 4.5 out of 5 and LlamaIndex rates 4.5 out of 5 — they are evenly matched.
See more options in our guide to the best agent framework tools for startups.
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