LangSmith
AI Agent & LLM Observability Platform
VS
Userlens
The smarter way to build products.
Detailed comparison
Criteria
LangSmith
Userlens
Pricing
Freemium
Freemium
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
—
Free trial
No
—
Audience
b2b
b2b
Platforms
Web
—
API
Yes
—
Open Source
Proprietary
—
Integrations
Pagerduty
—
Categories
Data Science, Dev Tools
Transcription, information technology & services, Specialized Technologies
Popularity
Very High
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...
Userlens provides advanced product analytics and user session replays to help product teams understand user behavior, identify pain points, and optimi...
Pricing
LangSmith
Freemium
Userlens
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Userlens
—
Free trial
LangSmith
No
Userlens
—
Audience
LangSmith
b2b
Userlens
b2b
Platforms
LangSmith
Web
Userlens
—
API
LangSmith
Yes
Userlens
—
Open Source
LangSmith
Proprietary
Userlens
—
Integrations
LangSmith
Pagerduty
Userlens
—
Categories
LangSmith
Data Science, Dev Tools
Userlens
Transcription, information technology & services, Specialized Technologies
Popularity
LangSmith
Very High
Userlens
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...
Userlens
Userlens provides advanced product analytics and user session replays to help product teams understand user behavior, identify pain points, and optimi...
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
Userlens
Session Replays
Heatmaps
Funnel Analysis
User Journey Maps
Event Tracking
User Segmentation
A/B Testing
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Userlens
Other comparisons
FAQ: LangSmith vs Userlens
LangSmith: AI Agent & LLM Observability Platform. Userlens: The smarter way to build products.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Userlens is freemium.
The best choice between LangSmith and Userlens 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. Userlens offers: Session Replays, Heatmaps, Funnel Analysis, User Journey Maps.
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.