How are AI tools compared on AIHub?

Every matchup compares the same dimensions — pricing model, core features, integrations, and best-fit use cases — so two tools are judged on like-for-like criteria rather than on whichever features each vendor chooses to advertise.

Which AI tool comparison should I start with?

Start from the category that matches your task — language models, code assistance, image or video generation, voice, or search — then open the head-to-head for the two tools you are actually deciding between.

Which use cases suit Haystack vs LlamaIndex?

Haystack is designed for: Frameworks. LlamaIndex is designed for: Frameworks. We recommend evaluating both tools against your own requirements.

What are the pricing options for Haystack and LlamaIndex?

Haystack uses a Free pricing model. LlamaIndex uses a Free pricing model. Check each vendor's official website for current pricing details.

Side-by-Side Comparison · 2026

Haystack 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.

Haystack

deepset

Free

LlamaIndex

Free

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: Free
API Access: Haystack: Not availableLlamaIndex: Not available
Platforms: Haystack: WebLlamaIndex: Web
Integrations: Haystack: —LlamaIndex: —
Vendor: Haystack: deepsetLlamaIndex: LlamaIndex
Category: Haystack: FrameworksLlamaIndex: Frameworks
Launch: 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

Full Haystack details

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

Full LlamaIndex details

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.

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