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LangSmith Chat

Application

by LangChain

LangSmith Chat analyzes application traces, threads, prompts and evaluations.

Find alternatives to LangSmith Chat

What it does

• Evaluation and observability

Features 4

• Run list explorationOn a project's run list, Chat browses and filters runs, creates datasets and adds examples.
• Trace analysisExamines the full trace context including inputs, outputs, intermediate steps and configuration.
• Thread analysisAnalyzes conversation threads for user sentiment, outcomes and interaction patterns.
• Prompt editingEdits and optimizes prompts in the playground, directly modifying messages, tools, output schemas and examples.

Sources

Pricing

Pricing page · 14 Oct 2026

"$39 / seat per month"

Description

Official documentation · 14 Oct 2026

"analyze traces, threads, prompts, and evaluations."

What it does

Official documentation · 14 Oct 2026

"quickly understand agent performance"

Sold within

Official documentation · 14 Oct 2026

"built directly into your LangSmith"

Name

Official documentation · 14 Oct 2026

"LangSmith Chat (formerly Polly) is"

URL

Official documentation · 14 Oct 2026

"LangSmith Chat (formerly Polly) is"

Deployment

Official documentation · 14 Oct 2026

"LangSmith is hosted on Google Cloud Platform"

Interfaces

Official documentation · 18 Oct 2026

Page: 'Chat appears in the right-hand bottom corner of the following locations within LangSmith UI'.

Also from LangChain

• LangChain Developer tool

  Open-source framework for composing language-model calls, tools and retrieval into applications.

• LangGraph Developer tool

  Open-source library for building agents as explicit graphs of steps and state.

• LangSmith Platform

  Traces, evaluates and monitors language-model applications in development and production.

• LangSmith Context Hub Agent platform

  Versions and deploys prompts and agent context. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

• LangSmith Deployment Agent platform

  Deploys and operates production agents. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

• LangSmith Engine Agent platform

  Analyzes agent traces and recommends fixes. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

• LangSmith Fleet Agent platform

  No-code agent building, deployment into Slack/Teams/Gmail, and human-in-the-loop approval controls. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

• LangSmith LLM Gateway Agent platform

  Governs model calls and spending across providers. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

• LangSmith Sandboxes Agent platform

  Runs agent-generated code in isolated virtual machines. Part of the LangSmith platform (categorized under 'No-Code Agents', 'Observability', 'Evaluation' or 'Deployment infrastructure' depending on the module).

• LangSmith Evaluation Agent platform

  LangSmith's evaluation service for agents: run evaluations on curated datasets to compare agent versions and catch regressions, score live traffic with online evaluators, collect human feedback in annotation queues and optimise prompts in a playground.

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