Research

LangSmith

Agent and LLM observability platform for tracing, monitoring, and evaluation of AI agents.

Category
Research
Pricing
Freemium, from $39 / seat per month
License
Proprietary
API
Yes
Platforms
Web
Listed
Nov 9, 2026
langchain.com
LangSmith website

Overview

LangSmith helps teams see what AI agents are doing in production. It provides tracing, real-time monitoring, evaluation, and insights to debug failures, track latency and cost, and review agent behavior step by step.

It supports popular frameworks and custom stacks through Python, TypeScript, Go, and Java SDKs, plus OpenTelemetry. Monitoring includes dashboards, online evals, alerts through webhooks or PagerDuty, and cost tracking.

It also includes SmithDB for fast trace search and querying, with random access, full-text search, JSON key-path filtering, trajectory queries, and self-hosting inside a VPC for sensitive data.

Team

  • Harrison Chase
    co-founder
  • Ankush Gola
    co-founder

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