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langwatch/langwatch

A unified platform for end-to-end LLM evaluation, AI agent testing, monitoring, and optimization, designed to streamline the development and deployment of reliable AI systems.

Core Features

End-to-end AI agent simulations with detailed decision tracing

Integrated loop for LLM evaluation, observability, and prompt optimization

OpenTelemetry-native integration for framework and LLM provider agnosticism

AI Gateway for LLM governance, cost control, and automatic fallbacks

Collaboration tools for reviewing runs, annotating failures, and managing prompts

Quick Start

npx @langwatch/server

Detailed Introduction

LangWatch is an all-in-one platform designed to simplify the complex lifecycle of LLM-powered agents. It addresses the challenges of testing, simulating, evaluating, and monitoring AI agents both pre-release and in production. By providing end-to-end agent simulations, an integrated loop for evaluation and optimization, and an OpenTelemetry-native architecture, LangWatch eliminates the need for custom tooling and tool sprawl. It empowers teams with full visibility into agent behavior, enabling systematic improvements in reliability, performance, and cost efficiency, while maintaining control over their AI systems.