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LangSmith

smith.langchain.com
Visit smith.langchain.com
Category
Developer Tools
Rank
No. 1328Tools index
Listed in
#2 Evaluate an LLM application · #2 Observe an LLM application
Pricing
Freemium
Type
TOOL
Use case
Model & Agent Evaluation · Deployment & Operations
Interfaces
SDK · API
Builder
@LangChain
Date

About

LangSmith is a platform for LLM observability, tracing, evaluation, and monitoring from the LangChain team — framework-agnostic, works with or without LangChain.

What it does

The site describes this as an agent and LLM observability platform that traces step-by-step agent behavior, monitors production performance, and clusters traces to surface usage patterns and failure modes. It states support for any framework via SDKs for Python, TypeScript, Go, and Java, plus OpenTelemetry.

Stated on the product site

Pricing model
Free tier for development plus paid plans that scale with trace volume
Deployment options
Managed cloud, bring-your-own-cloud, and self-hosted
SDK languages
Python, TypeScript, Go, and Java, with OpenTelemetry support
Stated integrations
OpenAI SDK, Anthropic SDK, Vercel AI SDK, and LlamaIndex, in addition to LangChain

Not stated on the site

  • The page does not state a license for the product.
  • The page does not give specific dollar figures for paid plan pricing, only that plans scale with trace volume.
  • The page does not describe a command line or local install surface beyond the language SDKs and dashboards.

Written from the product site at langchain.com.

Intel on LangSmith

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Tags

observabilitytracingllmevaluationmonitoringlangchain

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Editorially curated, with community endorsements as a secondary signal. Corrections welcome.