Monitoring

LangSmith

AI agent and LLM observability platform with end-to-end OpenTelemetry support, Agent Builder, prompt playground, and multi-framework tracing.

freemium · $0-$39/mo

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Features

  • End-to-end OpenTelemetry (OTel) tracing support
  • Agent Builder with managed deployment infrastructure
  • Prompt playground for no-code evaluation
  • Multi-framework tracing (OpenAI, Anthropic, Vercel AI SDK)
  • Custom dashboards for token usage, latency, and cost

Best use cases

Best use cases

Code Review Agent

Engineering teams spend 20-30% of their review cycle on repetitive style, security, and performance checks that could be automated. At scale, manual reviews become a bottleneck that slows deployment velocity.

Open Guide

Compatible tools

Anthropic

Claude Opus 4.6, Sonnet 4.5, and Haiku 4.5 with extended thinking, agent teams, MCP integration, and up to 1M token context windows.

usage-based

Open Tool

CrewAI

Multi-agent platform with open-source framework and Agent Management Platform (AMP). Visual editor, AI copilot, and enterprise deployment used by 60% of Fortune 500.

freemium

Open Tool

LangChain

Agent framework (v1.1) with create_agent abstraction, LangGraph stateful orchestration, middleware for retries and moderation, and model profiles.

open-source

Open Tool

OpenAI

GPT-5.2 and o-series reasoning models with the Responses API, AgentKit, and built-in tools for web search, code execution, and computer use.

usage-based

Open Tool