LangSmith
AI Agent & LLM Observability Platform
VS
Perplexity AI
AI-powered answer engine for real-time, cited information and advanced research.
Detailed comparison
Criteria
LangSmith
Perplexity AI
Pricing
Freemium
Freemium
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
Free Plan: Free, Perplexity Pro: $16.67/mo, Education Pro: $10/mo, Perplexity Max: $166.67/mo, Perplexity Enterprise Pro: $33.33/mo, Perplexity Enterprise Max: $270.83/mo, API Pricing: Custom
Free trial
No
No
Audience
b2b
b2c
Platforms
Web
Web
API
Yes
No
Open Source
Proprietary
Proprietary
Integrations
Pagerduty
—
Categories
Dev & Tech, information technology & services, Apps
Specialized Technologies, information technology & services, Search engine
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...
Perplexity AI is a research-oriented answer engine that integrates large language models with live web search, transparent citations, document analysi...
Pricing
LangSmith
Freemium
Perplexity AI
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Perplexity AI
Free Plan: Free, Perplexity Pro: $16.67/mo, Education Pro: $10/mo, Perplexity Max: $166.67/mo, Perplexity Enterprise Pro: $33.33/mo, Perplexity Enterprise Max: $270.83/mo, API Pricing: Custom
Free trial
LangSmith
No
Perplexity AI
No
Audience
LangSmith
b2b
Perplexity AI
b2c
Platforms
LangSmith
Web
Perplexity AI
Web
API
LangSmith
Yes
Perplexity AI
No
Open Source
LangSmith
Proprietary
Perplexity AI
Proprietary
Integrations
LangSmith
Pagerduty
Perplexity AI
—
Categories
LangSmith
Dev & Tech, information technology & services, Apps
Perplexity AI
Specialized Technologies, information technology & services, Search engine
Popularity
LangSmith
Very High
Perplexity AI
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...
Perplexity AI
Perplexity AI is a research-oriented answer engine that integrates large language models with live web search, transparent citations, document analysi...
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
Perplexity AI
Real-time answers with cited sources
Perplexity Computer for autonomous, multi-model AI workflows
Access to advanced AI models (GPT-5.1, Claude Opus 4.5, o3-pro, etc.)
File upload and analysis (PDFs, spreadsheets, reports)
Comet AI-native browser for integrated web assistance
Focus Modes for targeted searches (Web, Academic, Social, Health, Finance)
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Perplexity AI
- Real-time answers with cited sources
- Agentic AI workflows (Perplexity Computer)
- Document analysis & specialized focus modes
Other comparisons
FAQ: LangSmith vs Perplexity AI
LangSmith: AI Agent & LLM Observability Platform. Perplexity AI: AI-powered answer engine for real-time, cited information and advanced research.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Perplexity AI is freemium.
The best choice between LangSmith and Perplexity AI 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.
LangSmith is primarily designed for individuals, while Perplexity AI is built for individuals.
LangSmith offers: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts. Perplexity AI offers: Real-time answers with cited sources, Perplexity Computer for autonomous, multi-model AI workflows, Access to advanced AI models (GPT-5.1, Claude Opus 4.5, o3-pro, etc.), File upload and analysis (PDFs, spreadsheets, reports).
Based on our data, Perplexity AI currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.