
AI Agent & LLM Observability Platform

24/7 AI Receptionists & Live Human Agents
LangSmith: AI Agent & LLM Observability Platform. Smith.ai: 24/7 AI Receptionists & Live Human Agents. Both tools take different approaches to address similar needs.
LangSmith offers a freemium plan, while Smith.ai is a paid tool.
The best choice between LangSmith and Smith.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.
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. Smith.ai offers: AI Receptionists, Live Human Receptionists, Call Answering, Lead Intake.
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.