
AI Agent & LLM Observability Platform

Turn ideas into AI, Lightning fast.
LangSmith: AI Agent & LLM Observability Platform. Lightning AI: Turn ideas into AI, Lightning fast.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Lightning AI is freemium.
The best choice between LangSmith and Lightning 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. Lightning AI offers: Collaborative AI development, Zero-setup browser environment, Model prototyping and training, Scalable model serving.
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.