LangSmith

LLM observability and testing platform by LangChain

Data & AnalyticsFreemium

LangSmith is an all-in-one platform for debugging, testing, evaluating, and monitoring LLM applications. Built by the LangChain team, it provides full trace visibility into every LLM call, a dataset and evaluation framework, and production monitoring dashboards. AI engineers use LangSmith to ship higher-quality LLM applications faster.

Key Features

• ✓Full LLM call tracing
• ✓Dataset management and annotation
• ✓Automated evaluation suites
• ✓Production latency monitoring
• ✓Prompt versioning