
AI Agent & LLM Observability Platform

The AI Toolkit for TypeScript, from the creators of Next.js.
LangSmith: AI Agent & LLM Observability Platform. AI SDK: The AI Toolkit for TypeScript, from the creators of Next.js.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and AI SDK is free.
The best choice between LangSmith and AI SDK 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. AI SDK offers: AI SDK Docs, Tools Registry, AI Elements, AI Gateway.
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.