Evidently AI

Evidently AI is a testing and observability platform designed specifically for AI systems. It helps teams evaluate the quality, safety, and reliability of large language models and other AI applications before and after deployment. The platform provides automated testing for common AI failure modes like hallucinations, data leaks, toxic outputs, and jailbreak attempts, giving developers concrete metrics to assess their system's readiness.

The platform works by offering a library of 100+ pre-built evaluation metrics that can measure everything from factuality and adherence to guidelines to PII detection and sentiment analysis. Teams can also create custom evaluations using their own prompts, models, or rules. What makes Evidently AI stand out is its open-source foundation—the core technology has been downloaded over 35 million times and is trusted by thousands of companies worldwide. It provides both one-time evaluation reports and continuous monitoring through live dashboards.

This tool is most valuable for ML engineers, data scientists, and AI product teams who need to ensure their AI systems are production-ready and remain reliable over time. It's particularly useful for teams building RAG applications, AI agents, or predictive systems that require rigorous testing for safety, accuracy, and compliance. Companies use it to catch problems early, prevent embarrassing or dangerous AI failures, and maintain trust in their AI-powered products.