LangChain vs LlamaIndex

Which one do AI engines recommend, and how do they differ on price, fit and features?

The short answer

LangChain is the stronger AI pick in AI Agents: it has a visibility score of 10.4 versus 2.2 for LlamaIndex, and ranks ahead in 100% of the answers that name both.

Choose LangChain if…

You want the brand AI engines rank higher (10.4 vs 2.2)
You want a lower entry price ($39 vs $50)
You need a self-hosted or on-premises option
You prefer a larger, established vendor (201–500 employees)

Choose LlamaIndex if…

AI answers describe it more positively (20% vs 17% positive)
You need SOC 2 Type II or GDPR or HIPAA coverage
Usage-based pricing suits your budget better than per seat
Premier choice for RAG-centric agents

AI visibility side by side

Latest weekly run · Nov 3

Metric	LangChain	LlamaIndex
Visibility score	10.4%	2.2%
Change vs last week	New	New
Rank in AI Agents	#12	#41
Share of voice	2.7%	0.8%
Mentions this run	18	5
Positive in AI answers	17%	20%

The stronger value in each row is marked with a ✓.

Visibility score trend

Weekly runs over the last 60 days

LangChain 0pp · LlamaIndex 0pp over 0 weekly runs.

Engine by engine

LangChain leads on 3 of 3 engines

ChatGPT

12.6%

1.9%

AI Mode

13.3%

4.8%

Perplexity

5.2%

LangChainLlamaIndex

Head to head in AI answers

2 engine answers name both brands

2LangChain ranked higher

0LlamaIndex ranked higher

Prompt	Engine	LangChain	LlamaIndex
Compare the leading AI Agents platforms	AI Mode	#2	#5
Who makes the most used AI agent platform?	ChatGPT	#7	#8

Features, pricing & fit

Dimension	LangChain	LlamaIndex
Pricing model	Per seat	Usage-based
Entry price	Free; paid from $39 per seat / mo	Free; paid from $50 / mo
Free plan	Yes	Yes
Deployment	Cloud (SaaS), hybrid (SaaS control plane with self-hosted data plane), or self-hosted in the customer's VPC	LlamaParse runs as SaaS on a secure cloud tenant, or can be deployed in a customer's private VPC across cloud providers.
Compliance	—	SOC 2 Type II, GDPR, HIPAA
Support	Community forum, Support portal, Email support, Slack	Community, Basic (email), Priority (Slack Connect), Dedicated
Founded	2023	—
Headquarters	San Francisco, CA, United States	San Francisco, California, United States
Employees	201–500	11–50
Funding	Series B, led by IVP	Strategic minority equity investments (Databricks, KPMG) · $28M raised
Best for	Teams building agents that need control over models, context, memory and deployment, and the ability to test, govern and improve them in production	Teams in document-heavy industries such as finance, insurance, healthcare and manufacturing that need accurate parsing of complex tables, charts and scanned pages.