LangSmith

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LangChain's observability platform

Free tier | $39/seat/moObservabilityLast verified: 2026-01-18

Overview

LangSmith for debugging and monitoring LLM apps. Tight LangChain integration.

Works with

LangChainPythonJavaScriptAny LLM

Pricing

Pros

+Deep LangChain integration
+Strong evaluation
+Prompt playground
+Agent Builder (no-code)
+1-click deployment for LangGraph agents
+Framework-agnostic tracing

Cons

-Best with LangChain
-Can get expensive at scale
-Deployment only on Plus+

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Back

LangSmith

Visit site

LangChain's observability platform

Free tier | $39/seat/moObservabilityLast verified: 2026-01-18

Overview

LangSmith for debugging and monitoring LLM apps. Tight LangChain integration.

Works with

LangChainPythonJavaScriptAny LLM

Pricing

Pros

+Deep LangChain integration
+Strong evaluation
+Prompt playground
+Agent Builder (no-code)
+1-click deployment for LangGraph agents
+Framework-agnostic tracing

Cons

-Best with LangChain
-Can get expensive at scale
-Deployment only on Plus+

Find similar tools

Arize AI

Free tier +2

ML and LLM observability

LangChainLlamaIndex+4

Arize AI

Free tier +2

ML and LLM observability

LangChain+5

Braintrust

Free tier +2

Evals logging and prompt playground

PythonTypeScript+3

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Free tier +2

Evals logging and prompt playground

Python+4

Get Discovered by Developers

Promote your tool

Reach thousands of developers actively searching for AI tools. Featured listings get 10x more clicks.