Haystack vs LlamaIndex: Which is Better in 2026?
Choosing between Haystack 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 Haystack and LlamaIndex are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences. In our catalog, LlamaIndex rates slightly higher (4.5 vs 4.2 out of 5).
Haystack vs LlamaIndex — Side by Side
| Haystack | LlamaIndex | |
|---|---|---|
| Category | Agent Framework | Agent Framework |
| Pricing | Free | Free |
| Starting price | Free tier available | Free tier available |
| Free tier | ||
| Rating | 4.2 | 4.5 |
| Best for | Agent Framework — rag, retrieval | Agent Framework — ai, llm |
Pros & Cons
- Best retrieval abstractions of the group
- Pipelines are explicit and debuggable
- Production-minded from the start
- Smaller ecosystem than LangChain
- Pipeline model takes a while to click
- Excellent RAG tooling
- Strong document parsing (LlamaParse)
- Open-source
- Many data connectors
- Overlaps with LangChain (choose one)
- Cloud features usage-priced
Key Features Compared
Haystack
- Composable pipelines
- Retrieval and RAG components
- Agent and tool support
- Evaluation tooling
LlamaIndex
- Free open-source framework
- Best-in-class RAG primitives
- Data connectors & query engines
- Python & TypeScript
Choose Haystack if…
- You want a free tier to validate before paying.
- Best retrieval abstractions of the group
- Pipelines are explicit and debuggable
- Production-minded from the start
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 Haystack better than LlamaIndex?⌄
Both Haystack and LlamaIndex are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences. In our catalog, LlamaIndex rates slightly higher (4.5 vs 4.2 out of 5).
What is the difference between Haystack and LlamaIndex?⌄
Haystack — deepset's pipeline framework for RAG and agents, strongest on retrieval. 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.
Haystack vs LlamaIndex: which is cheaper?⌄
Haystack pricing: Free. LlamaIndex pricing: Free. Confirm current pricing on each tool's official site, as plans change.
Which is rated higher, Haystack or LlamaIndex?⌄
In our catalog, Haystack rates 4.2 out of 5 and LlamaIndex rates 4.5 out of 5, so LlamaIndex has a slight edge on reviews.
See more options in our guide to the best agent framework tools for startups.
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