Question 1

Is LlamaIndex better than Haystack?

Accepted Answer

It depends on your use case. LlamaIndex is known for Data framework for connecting LLMs to external data, while Haystack Open-source LLM framework for building NLP pipelines. See our full comparison above for a detailed breakdown.

Question 2

Is LlamaIndex free?

Accepted Answer

LlamaIndex pricing: Free (open-source) + Cloud.

Question 3

Is Haystack free?

Accepted Answer

Haystack pricing: Free (open-source).

Question 4

What are the main differences between LlamaIndex and Haystack?

Accepted Answer

LlamaIndex and Haystack differ in features, pricing, and platform support. LlamaIndex: Data framework for connecting LLMs to external data. Haystack: Open-source LLM framework for building NLP pipelines. See the full side-by-side comparison above for details.

Feature	LlamaIndex	Haystack
Category	Data & ETL	Data & ETL
Pricing	Free (open-source) + Cloud	Free (open-source)
GitHub Stars	✓ More stars 38k	18k
Platforms	Linux, macOS, Windows	Linux, macOS, Windows, Docker
Key Features	✓ RAG pipelines ✓ Data connectors ✓ Indexing ✓ Query engine ✓ Agent tools	✓ Pipeline builder ✓ RAG ✓ Document processing ✓ Model serving ✓ REST API
Pros	+ Best-in-class RAG framework + 100+ data connectors + Multiple index types + Great documentation + Active community	+ Production-grade RAG pipelines + Clean pipeline abstraction + Strong documentation + Multiple backend support + Enterprise ready
Cons	− Can be complex for simple use cases − Abstractions hide complexity − Learning curve for advanced features − Some features require LlamaCloud	− Steeper learning curve than LlamaIndex − Less community content − Breaking changes between versions − Heavy framework
Tags	ragdataindexingopen-source	ragnlppipelineopen-source

LlamaIndexvsHaystack

LlamaIndex

Haystack

Related Comparisons