Lunary

Lunary is an open-source observability and evaluation toolkit designed for AI developers who want real visibility into how their LLM-powered applications are actually performing. If you've ever shipped an AI chatbot and then had no clear way to understand why users were having frustrating experiences or where the model was going wrong, Lunary fills that gap. It provides log queries, chatbot analytics, and a rich set of tools to continuously improve your app's quality and reliability. Beyond basic monitoring, Lunary serves as a full AI developer platform — supporting internal knowledge management, customer support automation, and autonomous agent deployment. Whether you're building a product-facing chatbot or an internal productivity tool, Lunary gives you the observability and control you need to make it genuinely great.