LangSmith
AI Agent & LLM Observability Platform
VS
LlamaIndex
AI Agents for Document OCR + Workflows
Detailed comparison
Criteria
LangSmith
LlamaIndex
Pricing
Freemium
Freemium
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
Free Plan: Free, Starter Plan: $50/mo, Pro Plan: Custom, Enterprise Plan: Custom
Free trial
No
No
Audience
b2b
b2b
Platforms
Web
Web
API
Yes
Yes
Open Source
Proprietary
Proprietary
Integrations
Pagerduty
—
Categories
Dev & Tech, information technology & services, Apps
Data & Analytics, information technology & services, Database Q&A
Popularity
Very High
Very High
Description
LangSmith is a complete AI agent and LLM observability platform. It offers tracing and real-time monitoring to help developers debug agents, find fail...
LlamaIndex is where developers come to build document agents. We bring together industry-leading agentic OCR for AI-powered document processing of PDF...
Pricing
LangSmith
Freemium
LlamaIndex
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
LlamaIndex
Free Plan: Free, Starter Plan: $50/mo, Pro Plan: Custom, Enterprise Plan: Custom
Free trial
LangSmith
No
LlamaIndex
No
Audience
LangSmith
b2b
LlamaIndex
b2b
Platforms
LangSmith
Web
LlamaIndex
Web
API
LangSmith
Yes
LlamaIndex
Yes
Open Source
LangSmith
Proprietary
LlamaIndex
Proprietary
Integrations
LangSmith
Pagerduty
LlamaIndex
—
Categories
LangSmith
Dev & Tech, information technology & services, Apps
LlamaIndex
Data & Analytics, information technology & services, Database Q&A
Popularity
LangSmith
Very High
LlamaIndex
Very High
Description
LangSmith
LangSmith is a complete AI agent and LLM observability platform. It offers tracing and real-time monitoring to help developers debug agents, find fail...
LlamaIndex
LlamaIndex is where developers come to build document agents. We bring together industry-leading agentic OCR for AI-powered document processing of PDF...
Features
LangSmith
Cost tracking
Online LLM-as-judge and code evals
Tool and agent trajectory monitoring
Webhook and Pagerduty alerts
Message threading for multi-turn chat interactions
Templates for error analysis
LlamaIndex
LlamaIndex Core building blocks for AI agents
Industry-leading agentic OCR for AI-powered document processing
LlamaParse for advanced document parsing and extraction
Low-code workflow builder
Intelligent agents for complex document reasoning
Scalable and reliable production agents
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
LlamaIndex
- Agentic OCR for document processing
- Intelligent agents for document reasoning
Other comparisons
FAQ: LangSmith vs LlamaIndex
LangSmith: AI Agent & LLM Observability Platform. LlamaIndex: AI Agents for Document OCR + Workflows. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and LlamaIndex is freemium.
The best choice between LangSmith and LlamaIndex depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
Both are primarily designed for individuals. The choice depends on which specific features you need.
LangSmith offers: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts. LlamaIndex offers: LlamaIndex Core building blocks for AI agents, Industry-leading agentic OCR for AI-powered document processing, LlamaParse for advanced document parsing and extraction, Low-code workflow builder.
Based on our data, LangSmith currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.