Arize AI vs Galileo AI: Observability, Prompts & Evals Comparison
Compare Arize AI and Galileo AI side by side. Both are tools in the Observability, Prompts & Evals category.
The short answer
Choose Arize AI if built on OpenTelemetry standards ensuring interoperability and avoiding vendor lock-in.
Choose Galileo AI if generous free tier with 5,000 traces/month including Agent Reliability Platform.
Want to compare Arize AI and Galileo AI on your own traffic?
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 250+ models through one gateway. Free tier covers 10K traces per month. Setup in 5 minutes, no credit card.
Quick Comparison
| Category | Observability, Prompts & Evals | Observability, Prompts & Evals |
| Pricing | Freemium | Freemium |
| Best For | ML teams who need comprehensive observability spanning traditional ML models and LLM applications | AI teams who need to measure and improve the quality of their LLM outputs |
| Website | arize.com | rungalileo.io |
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Pros & Cons: Arize AI vs Galileo AI
- +Built on OpenTelemetry standards ensuring interoperability and avoiding vendor lock-in
- +Impressive scale with 1 trillion spans processed and 5 million monthly OSS downloads
- +Open-source Phoenix OSS option available for self-hosting
- +Enterprise-proven with major clients like DoorDash, Instacart, Reddit, and Uber
- +Comprehensive platform covering development, debugging, evaluation, and production monitoring
- −Enterprise pricing starting at ~$1,000/month may be prohibitive for smaller teams
- −Complexity of full feature set may require longer onboarding and learning curve
- −Less transparent pricing compared to competitors with clear tier structures
- +Generous free tier with 5,000 traces/month including Agent Reliability Platform
- +Recognized as Gartner Cool Vendor demonstrating industry validation
- +Research-backed metrics providing scientific rigor to evaluations
- +Real-time observability with automated drift detection and alerting
- +Established team of 142 employees providing solid support capacity
- −Limited public information about advanced features and capabilities
- −Pro plan pricing jumps from free to $100/month with potential gaps for small teams
- −Less community-driven compared to open-source alternatives like Langfuse
When to Choose Arize AI vs Galileo AI
- Production ML and LLM monitoring
- Embedding quality monitoring
- Model performance tracking
- Monitoring LLM output quality
- Detecting and preventing hallucinations
- Evaluating RAG pipeline accuracy
About Arize AI
Arize AI is a unified LLM observability and agent evaluation platform designed for AI application development and production management. The platform enables teams to build, observe, and improve AI systems through integrated development and production capabilities. Built on OpenTelemetry standards and open-source principles, Arize features 'adb,' a proprietary datastore optimized for generative AI workloads with real-time ingestion and sub-second query capabilities. The platform includes an agent framework for building and debugging AI agents, comprehensive tracing for full visibility into LLM application flows, automated evaluators with custom evaluation models, and Alyx, an AI engineering agent that assists with debugging and development. Arize offers experiment testing and optimization capabilities, production monitoring and alerting, a prompt playground for optimization, and data annotation tools. With impressive scale processing 1 trillion spans, 50 million evaluations per month, and 5 million monthly downloads of Phoenix OSS, Arize serves notable clients including DoorDash, Instacart, Reddit, Roblox, Uber, and Booking.com.
About Galileo AI
Galileo is an AI observability and evaluation platform designed to provide AI reliability for teams across the entire development lifecycle. The platform offers real-time observability that continuously evaluates systems in production, sending alerts if something goes wrong or if interactions drift from training data. Galileo provides powerful, research-backed metrics and evaluation-powered development workflows to help teams build, scale, monitor, and protect AI applications in real-time. The platform is recognized as a Gartner Cool Vendor and serves as a comprehensive solution for AI teams looking to ensure reliability and performance of their LLM applications. With the Agent Reliability Platform available as part of their free tier, Galileo makes advanced AI observability accessible to teams of all sizes. The platform emphasizes scalability, security, and premium support for enterprise customers while maintaining an approachable entry point through their generous free tier.
What is Observability, Prompts & Evals?
Tools for monitoring LLM applications in production, managing and versioning prompts, and evaluating model outputs. Includes tracing, logging, cost tracking, prompt engineering platforms, automated evaluation frameworks, and human annotation workflows.
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