LangWatch Review — Self-Hosted AI Tool
Our review of LangWatch — features, strengths, and trade-offs.
LangWatch is an open-source platform for LLM evaluations and AI agent testing. It helps teams test, simulate, evaluate, and monitor LLM-powered agents end-to-end, both before release and in production. Features include end-to-end agent simulations, a complete trace-to-evaluate-to-optimize workflow, OpenTelemetry-native integration with any framework, an AI Gateway for governance and cost control, and collaborative tools for teams to review runs and annotate failures. Self-host with Docker Compose, Kubernetes, or the npx CLI.