Arize AI vs Galileo

Arize AI is an LLM observability and evaluation platform designed for enterprises running AI agents and LLM applications at scale. Its flagship product, Arize AX, provides real-time monitoring, agent tracing, prompt management, online evaluations using LLM-as-a-Judge, and drift detection across NLP, computer vision, and multimodal models. The company also maintains Arize Phoenix, a widely adopted open-source AI observability library built on OpenTelemetry/OpenInference standards.

Galileo is an AI observability and evaluation engineering platform that helps enterprise teams evaluate, monitor, and protect generative AI applications and agents at scale. Its Agent Reliability platform enables teams to build ground-truth datasets, auto-tune evaluation metrics from live feedback, distill LLM-as-a-Judge evaluators into compact Luna models for production guardrails, and run the full eval engineering lifecycle from offline testing to production monitoring. The platform is trusted by teams at HP, Comcast, and Twilio, and is deployable as SaaS, VPC, or on-premises.