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Tools/LangChain/vs LlamaIndex
LangChain

LangChain

framework
vs
LlamaIndex

LlamaIndex

framework

LangChain vs LlamaIndex — Comparison

Pain: 3/10017 integrations6 features2,054,811 npm/wkSeries B
20 integrations5 features91,313 npm/wkSeries A
Overview
What each tool does and who it's for

LangChain

LangChain provides the engineering platform and open source frameworks developers use to build, test, and deploy reliable AI agents.

LangChain is highly praised for its capability in building and managing AI agents, evidenced by its consistent top ratings on G2, often scoring 4.5 to 5 out of 5. Users appreciate its robust functionality but note potential issues with observability and data management when deploying in production environments. The pricing sentiment is not directly addressed in the user reviews or mentions, implying that pricing may not be a major concern for users. Overall, LangChain holds a solid reputation among AI developers, although there are some concerns about AI agents potentially causing data management issues without proper oversight.

LlamaIndex

LlamaParse is the world

LlamaIndex is well-regarded for its robust capabilities in handling document retrieval with AI agents, earning high ratings from users on platforms like G2. Users appreciate its effectiveness in managing context within LLM-driven applications, although discussions indicate alternative strategies may sometimes be preferable. Pricing is generally viewed favorably, given its strong functionality and open-source nature. Overall, LlamaIndex has a positive reputation as a reliable tool for developers working with AI agents and RAG methodologies, despite the wider discussion on optimizing context handling methods.

Key Metrics
4.6★ (20)
Avg Rating
4.8★ (2)
9
Mentions (30d)
3
131,755
GitHub Stars
48,166
21,716
GitHub Forks
7,131
2,054,811
npm Downloads/wk
91,313
236,288,352
PyPI Downloads/mo
—
Mention Velocity
How discussion volume is trending week-over-week

LangChain

-50% vs last week

LlamaIndex

Stable week-over-week
Where People Discuss
Mention distribution across platforms

LangChain

Reddit
76%
YouTube
9%
Hacker News
9%
Dev.to
2%
GitHub
2%
Rss
2%

LlamaIndex

Reddit
81%
YouTube
14%
GitHub
3%
Hacker News
3%
Community Sentiment
How developers feel about each tool based on mentions and reviews

LangChain

9% positive89% neutral2% negative

LlamaIndex

16% positive78% neutral6% negative
Pricing

LangChain

usage-based + subscription + contract + per-seat + tieredFree tier

Pricing found: $0 / seat, $39 / seat, $39, $0.005 / deployment, $0.0007 / min

LlamaIndex

subscription + tieredFree tier

Pricing found: $0 /month, $50 /month, $500 /month, $1.25., $500/mo

Use Cases
When to use each tool

LangChain (8)

Building autonomous AI agentsCreating multi-agent systems for complex tasksImplementing real-time monitoring and observability for agentsDeveloping no-code agent builders for non-technical usersIntegrating AI agents into existing enterprise workflowsTesting and debugging AI agents in production environmentsScaling agent deployment across multiple teamsUtilizing agent evaluation tools for performance assessment

LlamaIndex (1)

How leading teams use document intelligence
Features

Only in LangChain (6)

LangSmith Agent Engineering PlatformUnderstand exactly what your agent is doingUse real-world usage for iterative improvementShip and scale agents in productionAgents for the whole companyBuild with our open source frameworks

Only in LlamaIndex (5)

SolutionsProductsResourcesCompanyWeekly newsletter
Integrations

Shared (12)

OpenAIAWS LambdaMicrosoft AzureSlackZapierTwilioSalesforceJiraGitHubNotionTrelloAsana

Only in LangChain (5)

Google Cloud PlatformTableauPower BIDatadogPrometheus

Only in LlamaIndex (8)

Google Cloud StorageDropboxBoxMicrosoft TeamsZoomStripeShopifyHubSpot
Developer Ecosystem
232
GitHub Repos
115
17,647
GitHub Followers
3,570
20
npm Packages
20
25
HuggingFace Models
24
What Users Say
Top reviews from G2, Capterra, and TrustRadius

LangChain

What do you like best about Langchain?Out of the box features that it provides to manage and monitor llm based applications Review collected by and hosted on G2.com.What do you dislike about Langchain?Nothing in general, folks with no experience can get lost in the myriads of features it offers Review collected by and hosted on G2.com.

5.0\u2605Verified User in Telecommunicationsg2

What do you like best about Langchain?This framework is useful for building generative AI applications, especially when you need to utilize large language models, vector databases, retrieval mechanisms, and track the entire execution process. Review collected by and hosted on G2.com.What do you dislike about Langchain?Nothing, it has only evolved to enable developers like us to develop robust applications Review collected by and hosted on G2.com.

5.0\u2605Verified User in Financial Servicesg2

What do you like best about Langchain?The platform is easy to use, even if you only have a basic understanding of AI concepts. I found that navigating the features didn't require advanced technical knowledge, which made the experience straightforward and accessible. Review collected by and hosted on G2.com.What do you dislike about Langchain?Sometimes, other frameworks appear to be simpler. Review collected by and hosted on G2.com.

5.0\u2605Mirian P.g2

LlamaIndex

What do you like best about LlamaIndex?it is better in fast data retrieval and generating concise response and a good framework A alternative for langchain. easy to use ease of implementation Review collected by and hosted on G2.com.What do you dislike about LlamaIndex?its is not much flexibility for chained logic and creative generation as langchain Review collected by and hosted on G2.com.

5.0\u2605Jeevan Ignatious Reddy G.g2

What do you like best about LlamaIndex?As a data scientist dealing with large language models LLMs I found LlamaIndex quite helpful to manage. It has granted me the ability to input data in formats such as PDFs or API, databases and excel, which makes it easier for me to train and execute LLMs with numerous datasets. Review collected by and hosted on G2.com.What do you dislike about LlamaIndex?This is where the perceived level of control over natural language processing (NLP) in the platform is somewhat constrained. Specific to pipeline needs or how the language model is resolved, there is less fine-grained control than directly coding within the LLM context provided by LlamaIndex. Review collected by and hosted on G2.com.

4.5\u2605Shihab R.g2
Pain Points
Top complaints from reviews and social mentions

LangChain

cost tracking (3)token usage (3)openai bill (2)API costs (2)API bill (1)large language model (1)llm (1)ai agent (1)openai (1)gpt (1)

LlamaIndex

LLM costs (1)cost tracking (1)
Top Discussion Keywords
Most mentioned keywords from community discussions

LangChain

cost tracking (3)token usage (3)openai bill (2)API costs (2)API bill (1)large language model (1)llm (1)ai agent (1)openai (1)gpt (1)token cost (1)

LlamaIndex

LLM costs (1)cost tracking (1)
Latest Videos
Recent uploads from official YouTube channels

LangChain

How to monitor production AI agents: A simple breakdown

How to monitor production AI agents: A simple breakdown

Apr 12, 2026

How Hex Builds AI Agents: Making Agents Reason Like Human Data Analysts | Izzy Miller, AI Engineer

How Hex Builds AI Agents: Making Agents Reason Like Human Data Analysts | Izzy Miller, AI Engineer

Apr 9, 2026

Deploy Agents with A2A on LangSmith Deployment

Deploy Agents with A2A on LangSmith Deployment

Apr 8, 2026

7,500+ Arcade.dev tools now available in LangSmith Fleet

7,500+ Arcade.dev tools now available in LangSmith Fleet

Apr 7, 2026

LlamaIndex

Introducing ParseBench: The First Document Parsing Benchmark for AI Agents

Introducing ParseBench: The First Document Parsing Benchmark for AI Agents

Apr 13, 2026

LlamaParse vs  LLMs: Live OCR Battleground

LlamaParse vs  LLMs: Live OCR Battleground

Mar 26, 2026

LiteParse: Local Document Parsing for AI Agents

LiteParse: Local Document Parsing for AI Agents

Mar 19, 2026

Scaling Document Ingestion for AI Agents  Lessons from the field with StackAI

Scaling Document Ingestion for AI Agents Lessons from the field with StackAI

Feb 26, 2026

Product Screenshots

LangChain

LangChain screenshot 1LangChain screenshot 2

LlamaIndex

LlamaIndex screenshot 1LlamaIndex screenshot 2LlamaIndex screenshot 3LlamaIndex screenshot 4
What People Talk About
Most discussed topics from community mentions

LangChain

workflow9
pricing4
api4
agents4
scalability3
model selection3
data privacy3
cost optimization3

LlamaIndex

model selection15
RAG15
api9
cost optimization9
workflow9
documentation8
pricing7
open source6
Top Community Mentions
Highest-engagement mentions from the community

LangChain

Ask HN: How are you monitoring AI agents in production?

With the recent incidents (DataTalks database wipe by Claude Code, Replit agent deleting data during code freeze), it&#x27;s clear that running AI agents in production without observability is risky.<p>Common failure modes I&#x27;ve seen: no visibility into what the agent did step-by-step, surprise

Hacker Newsby jairoohpositive source

LlamaIndex

I built Dome: An open-source, local-first knowledge management app with a built-in AI agent workspace. Looking for feedback and testers!

Hey everyone! I wanted to share a personal project I’ve been pouring my heart into for the last few months. It's an open-source desktop app called **Dome** ([https://github.com/maxprain12/dome](https://github.com/maxprain12/dome)). **The itch I was scratching:** I deal with a lot of PDFs, research

Redditby MaxPrain12positive source
Company Intel
information technology & services
Industry
information technology & services
98
Employees
95
$260.0M
Funding
$46.5M
Series B
Stage
Series A
Supported Languages & Categories

Shared (4)

AI/MLDevOpsSecurityDeveloper Tools

Only in LangChain (1)

Analytics

Only in LlamaIndex (1)

FinTech
View LangChain Profile View LlamaIndex Profile