Comet
End-to-end ML platform for AI teams: track, monitor, and reproduce experiments.
VS
LangSmith
AI Agent & LLM Observability Platform
Detailed comparison
Criteria
Comet
LangSmith
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
Data Science, Dev Tools
Popularity
High
Very High
Description
Comet is an end-to-end model evaluation platform for developers focused on shipping AI features, including open-source LLM tracing and experiment trac...
LangSmith is a complete AI agent and LLM observability platform. It offers tracing and real-time monitoring to help developers debug agents, find fail...
Pricing
Comet
Freemium
LangSmith
Freemium
Plans & pricing
Comet
—
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Free trial
Comet
—
LangSmith
No
Audience
Comet
B2B
LangSmith
b2b
Platforms
Comet
—
LangSmith
Web
API
Comet
—
LangSmith
Yes
Open Source
Comet
—
LangSmith
Proprietary
Integrations
Comet
—
LangSmith
Pagerduty
Categories
Comet
Data Science, Dev Tools
LangSmith
Data Science, Dev Tools
Popularity
Comet
High
LangSmith
Very High
Description
Comet
Comet is an end-to-end model evaluation platform for developers focused on shipping AI features, including open-source LLM tracing and experiment trac...
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...
Features
Comet
Experiment tracking and management
ML unit-testing
Model evaluation
Open-source LLM tracing
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
Key differentiators
Comet
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Other comparisons
FAQ: Comet vs LangSmith
Comet: End-to-end ML platform for AI teams: track, monitor, and reproduce experiments.. LangSmith: AI Agent & LLM Observability Platform. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. Comet is freemium and LangSmith is freemium.
The best choice between Comet and LangSmith 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.
Comet is primarily designed for businesses and professionals, while LangSmith is built for individuals.
Comet offers: Experiment tracking and management, ML unit-testing, Model evaluation, Open-source LLM tracing. LangSmith offers: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts.
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.