infrastructure
LangSmith
by LangChain
LangSmith is LangChain's full-stack LLMOps observability and evaluation platform, purpose-built for debugging, monitoring, and testing LLM applications and agents. It provides end-to-end tracing of every LLM call, tool invocation, and chain step alongside automated and human-in-the-loop evaluation workflows. While deeply integrated with LangChain and LangGraph, it supports any LLM provider via SDKs for Python, TypeScript, Go, and Java, plus OpenTelemetry compatibility.
8 Overall Score
Scores
Capability 8
Ease of Use 7
Documentation 8
Reliability 8
Value 7
Momentum 8
Details
- Status
- active
- Pricing
- freemium
- Launch Date
- Last Updated
Key Features
- Full LLM trace capture with nested span visualization for chains, agents, and tool calls
- Automated and human evaluation frameworks with multi-turn and trajectory scoring
- Prompt management, versioning, and A/B testing across model providers
- Production monitoring with latency, cost, and error dashboards
- Dataset management for regression testing and continuous evaluation pipelines