Verified pricing
Arize AI pricing
Arize AI uses a tiered subscription model for its AX SaaS platform, starting from a free tier up to $50/month for Pro (plus overages), alongside a free open-source version (Phoenix).
Phoenix is free and open-source (self-hosted); AX Free is a SaaS tier with 25k spans and 1GB ingestion per month.
Tiers
- Trace spans (User managed)
- Ingestion volume (User managed)
- Projects (User managed)
- Retention (User managed)
- 25k spans per month
- 1 GB per month ingestion
- 15 days retention
- Alyx (Arize agent)
- Online evals
- Product observability
- 50k spans per month
- 10 GB per month ingestion
- 30 days retention
- Higher rate limits
- Email support
- Everything in AX Free
- Dedicated support
- Uptime SLA
- SOC2 reports and HIPAA
- Training sessions
- adb Data Fabric
- SaaS or Self-Hosted options
Hidden costs
Costs that do not appear in the headline price. Sourced from the same pricing pages and product docs as the tiers above.
- Additional span traces: $10 per million (AX Pro overage)
- Additional ingestion: $3 per GB (AX Pro overage)
- Dedicated support add-on available for Phoenix
- Self-Hosting add-on available for Enterprise (includes multi-region and data residency)
Contract terms
SaaS tiers are billed monthly. AX Pro has a published monthly rate, while AX Enterprise is custom-quoted and supports both SaaS and Self-Hosted deployments. Startup pricing is available upon application.
Discounts
- Startup pricing available for eligible companies (application required)
How Arize AI compares
Arize AI offers a tiered model that bridges open-source development (Phoenix) with a full-featured SaaS platform (AX). The Pro tier is competitively priced at $50/month, though it features usage-based overage fees ($10 per million spans). Its focus on agentic observability (Alyx) and built-in evaluation workflows makes it a strong competitor to LangSmith and Braintrust.
Alternatives by price
Who this fits
Ideal for AI engineering teams needing end-to-end LLM observability, from local debugging with Phoenix to production monitoring and SOC2-compliant enterprise governance.
Notes
- Discrepancy noted between pricing cards and comparison table regarding AX Pro limits; cards list 10GB/30 days while table lists 100GB/15 days. Card values were prioritized as primary.
- Phoenix is available as both open-source and on Phoenix Cloud.
Get a real quote
Prices above are list. Enterprise contracts almost always settle below list with annual commitment, multi-product bundles, or volume tiers. Send Arize AI a quote request through AI Compliance Vendors and the conversation starts with the right context.
Our pricing methodology
Every tier on this page cites a public source. We do not paraphrase analyst reports or print numbers we cannot link to. If a tier exists but its price is hidden, we mark it "Contact vendor" rather than guess. If you spot a stale price, tell us and we will re-verify within 48 hours.
For context across all 10 vendors with public pricing, read AI Compliance Vendor Pricing in 2026.