Can I use LangChain Agents and LlamaIndex together?

Yes, many teams use both tools together for different purposes. Use the Stack Builder section above to combine LangChain Agents and LlamaIndex with other tools and save your AI toolkit.

Does LangChain Agents or LlamaIndex have a free plan?

LangChain Agents is a paid tool. LlamaIndex is a paid tool. Always verify current pricing directly with the vendor.

LangChain Agents vs LlamaIndex

Comprehensive side-by-side comparison — features, pricing, performance, and more.

Updated June 2026

LangChain Agents

LangChain, Inc.

The open-source framework and platform for building, observing, and deploying AI agents.

0.0(0)

OPEN_SOURCE

92% data quality

LlamaIndex

LlamaIndex Inc.

Core building blocks for AI agents and document automation

0.0(0)

OPEN_SOURCE

91% data quality

Trust & Reliability

LangChain Agents

Customers (per vendor):Klarna, Vanta, Rippling +7

GDPR

LlamaIndex

Users:100K-1M

Overall Winner: LlamaIndex

7.5/10 vs LangChain Agents at 7.0/10

Leads in:

Output Quality

Integrations

Ease of Use

AI Comparison Summary

LangChain Agents

7.0

avg score

LlamaIndex

7.5

avg score

LlamaIndex leads overall — particularly in Integration Power.

Based on 6 dimensions

How scores are calculated

Overall Winner

LlamaIndex

7.5 / 10

LangChain Agents

Best For

Developers building custom AI agents

Teams needing to observe and evaluate LLM applications

Engineers deploying scalable, production-ready agents

Researchers experimenting with multi-agent systems

Not Ideal For

Non-technical users seeking a no-code, drag-and-drop agent builder without any coding

Individuals looking for a pre-built, off-the-shelf agent for specific tasks without customization

Users who prefer a fully managed, black-box solution without needing to understand agent internals

LlamaIndex

Best For

Building LLM-powered agents for custom data sources

Automating complex document processing and extraction

Developing Retrieval-Augmented Generation (RAG) applications

Orchestrating multi-step AI workflows for enterprise automation

Not Ideal For

Non-technical users seeking a no-code agent builder

Simple, single-step automation tasks without complex data interaction

Users who prefer a fully managed, proprietary AI agent solution without customization

* Verdict is based on our algorithmic scoring of publicly available data. Learn about our methodology

LangChain Agents is best for

🤖Automation & Agents7.7

LlamaIndex is best for

🤖Automation & Agents6.7

Filter by your use case:

Pros & Cons

LangChain Agents

Pros

Highly flexible and extensible for custom agent logic
Supports a wide range of LLM providers, preventing vendor lock-in
Comprehensive tools for debugging and performance evaluation (LangSmith)
Facilitates human-in-the-loop workflows for complex tasks
Strong community support and extensive documentation
Enables multi-agent collaboration and orchestration

Cons

Steep learning curve for beginners without development experience
Requires coding knowledge for advanced customization and framework usage
LangSmith platform costs can add up with high usage volumes
Performance and reliability depend heavily on underlying LLM choices
Debugging complex multi-step agents can still be challenging

LlamaIndex

Pros

Provides a comprehensive framework for building sophisticated AI agents
Offers best-in-class document parsing and extraction capabilities with LlamaParse
Highly configurable and scalable for enterprise-grade performance
Supports a wide array of LLMs, embeddings, and vector stores via connectors
Features an event-driven, async-first workflow engine for flexible orchestration
Backed by a large and active open-source developer community

Cons

Requires coding knowledge (Python/Typescript) for full utilization
LlamaParse, the commercial document processing platform, is not open source
Steep learning curve for beginners due to extensive customization options
Building complex agentic workflows may require significant development effort

Weighted Score — Adjust What Matters to You

Pick a profile or drag sliders — scores and radar update instantly on the right.

Quick profiles:

Ease of Use5

Output Quality5

Value for Money5

Customizability5

Support & Ecosystem5

Integration Power5

Dimension Comparison

LangChain Agents

7.0

/ 10

LlamaIndex

7.5

/ 10

Your pick

Dimension Breakdown

Ease of Use

How easy it is to get started and use daily

LangChain Agents

5.0

LlamaIndex

6.0▲ +1.0

Output Quality

Quality and accuracy of generated results

LangChain Agents

7.0

LlamaIndex

8.0▲ +1.0

Value for Money

Cost vs. features and output quality

LangChain Agents

7.0

LlamaIndex

7.0

Customizability

Calculated

Ability to tailor to specific needs

LangChain Agents

9.0▲ +1.0

LlamaIndex

8.0

Support & Ecosystem

Documentation, community, and support quality

LangChain Agents

8.0

LlamaIndex

8.0

Integration Power

Calculated

Ability to connect with other tools and workflows

LangChain Agents

6.0

LlamaIndex

8.0▲ +2.0

Calculated = derived from verified integration count and API/open-source signals. AI = LLM-assessed from public website content. Methodology

Data is sourced from public information and vendor websites. It may not always be up-to-date — verify pricing and features directly with the vendor before purchasing.Report inaccuracy

Frequently Asked Questions

Which is better, LangChain Agents or LlamaIndex?

Both are strong options. LangChain Agents has a rating of 0.0/5 (0 reviews), while LlamaIndex has a rating of 0.0/5 (0 reviews). The best choice depends on your specific use case, budget, and workflow requirements.

Is LangChain Agents cheaper than LlamaIndex?

LangChain Agents starts at free (open_source model). LlamaIndex starts at free (open_source model). Use the Cost Calculator above for a detailed estimate.

What are the main differences between LangChain Agents and LlamaIndex?

LangChain Agents — "The open-source framework and platform for building, observing, and deploying AI agents.". LlamaIndex — "Core building blocks for AI agents and document automation". Key differences include their pricing models, platform support, integrations, and technical capabilities. See the Feature Comparison table above for a complete side-by-side breakdown.

Explore Alternatives

LangChain Agents Alternatives

Tools similar to LangChain Agents

LlamaIndex Alternatives

Tools similar to LlamaIndex

Compare More AI Tools

Use our comparison tool to compare up to 5 AI tools side-by-side with AI-powered recommendations.