LangWatch

Once your LLM app is live, how do you know it's actually working the way you intended — and catch problems before users do? LangWatch is an LLM observability and evaluation platform designed to give AI teams full visibility into prompts, variables, tool calls, and agents across major AI frameworks. It enables faster debugging with smarter insights, supports both offline and online checks using LLM-as-a-Judge and code-based tests, and scales evaluations to production. Real-time monitoring with automated anomaly detection, smart alerting, root cause analysis, and tools for annotations, labeling, and experimentation make LangWatch the command center for reliable LLM applications.