Kiln

About Kiln

Kiln is an open-source platform and Python library designed for building, evaluating, and optimizing AI systems. It provides tools for fine-tuning models, prompt optimization, automated evaluations, RAG (retrieval-augmented generation), agentic workflows, synthetic data generation, and more. Kiln is ideal for AI engineers, data scientists, and research teams who want an integrated, local-first environment with extensibility and privacy. The platform is free, open-source under MIT for the core library, and source-available for the desktop app.