Ranked 2 of 8 in best AI agent frameworks and tooling
The strongest focus on documents and retrieval, with an MIT-licensed framework and a separate parsing service. It is narrower for general agent work than LangChain.
Best for Agents that work over documents and data
About LlamaIndex
LlamaIndex is an open-source framework for connecting language models to documents and data, and for building agentic applications around them. Its repository describes the project as a document processing platform for AI and releases it under the MIT license.
The framework is free to use. LlamaParse, the company's document parsing product, is offered separately and can be used on its own as well as with the framework. Compared with LangChain, LlamaIndex centers more on documents and retrieval, although both support agents. Teams with heavy document ingestion may find its parsing tools a natural fit.
Key features
- Document processing
- Retrieval workflows
- Agentic applications
- LlamaParse
Strengths
- MIT licensed with source on GitHub
- Focus on document and data workflows
- Separate parsing service available
Limits
- Parsing service is a separate product to evaluate
- Narrower agent focus than general orchestration frameworks
Where LlamaIndex ranks
| List | Rank | Score | Best for |
|---|---|---|---|
| Best AI agent frameworks and tooling | 2 of 8 | 88.0 | Agents that work over documents and data |
Alternatives to LlamaIndex
All 7 alternatives
LangChainMIT-licensed framework for LLM apps and agents, with LangGraph
Pydantic AIMIT-licensed typed Python framework for agents and model calls
HaystackApache-2.0 framework for pipelines, retrieval and agent workflows
CrewAIMIT-licensed framework for teams of role-based AI agents- OpenAI Agents SDKLightweight MIT-licensed Python SDK for multi-agent workflows
smolagentsSmall Apache-2.0 library for agents that act by writing code
Questions about LlamaIndex
- Is LlamaIndex free?
- LlamaIndex can be used without paying: MIT-licensed framework is free; LlamaParse is a separate service. Check the vendor’s pricing page for current limits.
- Is LlamaIndex open source?
- Yes. LlamaIndex publishes its source code under the MIT license.
- Which platforms does LlamaIndex support?
- LlamaIndex is available on: Web.
- What is LlamaIndex best for?
- Agents that work over documents and data. In our ranking of AI agent frameworks and tooling it is number 2 of 8 with a score of 88.0.
- What are the best alternatives to LlamaIndex?
- The highest-ranked alternatives on listme.name are LangChain, Pydantic AI, Haystack, CrewAI.