
AI Agent & LLM Observability Platform
Observability for LLM-powered applications
LangSmith: AI Agent & LLM Observability Platform. Protonic: Observability for LLM-powered applications. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Protonic is freemium.
The best choice between LangSmith and Protonic 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. Protonic offers: LLM Observability, Real-time Tracing, Cost & Token Tracking, Performance Monitoring.
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.