Haystack
deepset
FreeLlamaIndex
LlamaIndex
FreeHaystack vs LlamaIndex: Full Comparison (2026)
Haystack is open-source framework for production nlp and rag pipelines. LlamaIndex is data framework for building llm applications over your data. Use the breakdown below to find the right fit for your needs.
This page presents factual information sourced from publicly available vendor documentation and product pages. AIHub does not endorse either product. The right tool depends on your specific use case, team, and requirements — we recommend evaluating both tools directly before making a decision.
Side-by-Side Overview
Pricing Model
Haystack
FreeLlamaIndex
FreeAPI Access
Haystack
Not availableLlamaIndex
Not availablePlatforms
Haystack
WebLlamaIndex
WebIntegrations
Haystack
—LlamaIndex
—Vendor
Haystack
deepsetLlamaIndex
LlamaIndexCategory
Haystack
FrameworksLlamaIndex
FrameworksLaunch
Haystack
—LlamaIndex
—| Feature | Haystack | LlamaIndex |
|---|---|---|
| Pricing Model | Free | Free |
| API Access | Not available | Not available |
| Platforms | Web | Web |
| Integrations | — | — |
| Vendor | deepset | LlamaIndex |
| Category | Frameworks | Frameworks |
| Launch | — | — |
About Haystack
Haystack by deepset is an open-source framework for building NLP applications, RAG systems, and LLM pipelines. Features a pipeline architecture with 60+ integrations including all major vector databases and LLM providers.
Designed For
- Document Q&A
- RAG pipelines
- Semantic search
- LLM application development
About LlamaIndex
LlamaIndex (formerly GPT Index) simplifies connecting custom data sources to LLMs. Provides data connectors, indexing strategies, and query engines for building RAG applications.
Designed For
- RAG over documents
- Structured data querying
- Multi-agent systems
- Knowledge bases
Strengths & Limitations
Haystack
Strengths
- Production-ready
- 60+ integrations
- Pipeline architecture
Limitations
- Steeper learning curve
- Less popular than LangChain
LlamaIndex
Strengths
- Data-focused
- Easy RAG setup
- Many connectors
Limitations
- Less agent-focused than LangChain
- Learning curve
Frequently Asked Questions
What is the difference between Haystack and LlamaIndex?
Haystack is open-source framework for production nlp and rag pipelines, while LlamaIndex is data framework for building llm applications over your data. Haystack is designed for Frameworks; LlamaIndex is designed for Frameworks. The right fit depends on your specific requirements.
How do the pricing models compare?
Haystack is available under a Free model. LlamaIndex is available under a Free model. Always verify pricing on each vendor's official website as it may change.
How do I choose between Haystack and LlamaIndex?
Consider your team's technical requirements, budget, existing tooling, and use case before deciding. We recommend signing up for free trials or demos of both tools where available, and consulting each vendor's documentation. AIHub provides this comparison for informational purposes only.
Feature Snapshot
Explore Further
Haystack full detailsLlamaIndex full detailsHaystack official siteLlamaIndex official siteRelated Comparisons
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Data sourced from public vendor documentation. Pricing, features, and availability may change. Always verify on official vendor websites before making purchasing decisions. AIHub is not affiliated with any of the listed vendors.