DeepEval

DeepEval is an open-source evaluation framework for LLM applications that works like Pytest but specialized for unit testing LLM outputs. It provides 50+ research-backed evaluation metrics including G-Eval, relevance, factual consistency, bias, and toxicity detection. Covers AI agents, RAG pipelines, and chatbots with support for synthetic dataset generation, red teaming, and CI/CD integration. Confident AI is the commercial platform layer adding collaboration, visualization, production tracing, and observability. 3M+ monthly downloads.