Is Arize AI worth the price?
Arize AI offers a generous free tier (AX Free) and an open-source option (Phoenix), making it highly accessible for individual developers and small teams.
The AX Pro tier at $50/month provides a good step up in resources for growing projects. Enterprise users will find custom solutions, which is standard for this level of service.
Pricing Plans
Phoenix
Free & open source
- Trace spans: User managed
- Ingestion volume: User managed
- Projects: User managed
- Retention: User managed
- Support add-on: Dedicated support
AX Free
Free
- Trace spans: 25k spans per month
- Ingestion volume: 1 GB per month
- Projects: N/A
- Retention: 7 days
- Alyx (Arize agent)
- Online evals
- Product observability (monitors & custom metrics)
- Community support
AX Pro
$50 per month
- Trace spans: 50k spans per month
- Ingestion volume: 10 GB per month
- Projects: N/A
- Retention: 15 days
- Everything in AX Free
- Higher rate limits
- Longer retention
- Email support
AX Enterprise
Custom
- Trace spans: Custom
- Ingestion volume: Custom
- Projects: Custom
- Retention: Configurable
- Everything in AX Pro
- Dedicated support
- Uptime SLA
- Custom data limits
- SOC2 reports and HIPAA
- Training sessions
- DataFabric Connect
- Self-Hosting add-on
- Data residency
- Multi-region deployments
Hidden Costs & Gotchas
Overage fees likely for exceeding AX Pro limits
Self-hosting is an Enterprise add-on
Dedicated support is an Enterprise feature
Which Plan Do You Need?
Individual developers & researchers
Startups needing LLM observability
Enterprises with custom requirements
How Arize AI Compares to Competitors
Compared to Datadog's AI Observability, which can quickly scale into hundreds or thousands of dollars for similar monitoring, Arize AI's AX Pro at $50/month is significantly more affordable for initial growth. While LangChain's LangSmith offers a free tier, Arize's AX Free provides more explicit data limits (25k spans, 1GB) making cost predictability clearer for early users.
Arize AI Pricing FAQ
How much does Arize AI cost?
Arize AI starts at $50/month on the AX Pro plan. A free plan is also available with limited features.
Does Arize AI have a free plan?
Yes. Arize AI offers a free plan called "Phoenix". It includes: Trace spans: User managed, Ingestion volume: User managed, Projects: User managed.
Is there a cheaper alternative to Arize AI?
Yes. Popular alternatives to Arize AI include WhyLabs, Outlines, Braintrust. Free alternatives include WhyLabs, Outlines, Braintrust. Compare them side-by-side on Toolradar.
Cheaper alternatives to Arize AI
Direct competitors with similar features. Many offer free tiers or lower per-seat pricing.
