
End-to-end ML platform for AI teams: track, monitor, and reproduce experiments.

AI Agent & LLM Observability Platform
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.