Haystack vs LlamaIndex

The duct tape for RAG pipelines meets data framework for llm apps. Here's our take.

Haystack

The duct tape for RAG pipelines. Because sometimes you just need to glue an LLM to your docs without reinventing the wheel.

Pros

• Pre-built components for document indexing, retrieval, and LLM integration
• Supports multiple vector databases and LLM providers out of the box
• Pipeline-based architecture makes complex workflows manageable

Cons

• Steep learning curve for customizing beyond basic use cases
• Documentation can be overwhelming for beginners

LlamaIndex

Nice Pick

Data framework for LLM apps

Pros

Cons

The Verdict

These tools serve different purposes. Haystack is a ai assistants while LlamaIndex is a frameworks. We picked LlamaIndex based on overall popularity, but your choice depends on what you're building.

The Bottom Line

LlamaIndex wins

Based on overall popularity. LlamaIndex is more widely used, but Haystack excels in its own space.