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Paid plans start at $50/mo. There's also a free plan.
Arize AX Free costs $0 per month and includes capped monthly allowances; Phoenix is the open-source, local-first alternative. AX Pro is listed at $50 per month, while AX Enterprise uses custom pricing. The bill is shaped by issues, spans, ingestion and retention rather than user counts or evaluations, which are unlimited on the listed AX plans. Annual Pro pricing, overage rates and add-ons are not published, so confirm production terms with Arize before estimating spend.
01Every plan, line by line
| Plan | Billed annually | Billed monthly | Built for |
|---|---|---|---|
| AX Free | — | $0 | Builders |
| AX Pro | — | $50 | AI-native teams |
| AX Enterprise | — | Quote | Teams with scaled AI use cases |
02What the plan grid doesn't tell you
Usage above plan limits
Free and Pro cap issues, spans and ingestion. Arize does not publish overage rates; ask what happens when your usage exceeds a monthly allowance.
Retention requirements
Free lists 15-day retention and Pro 30 days. Longer retention requires Enterprise’s custom terms; ask how it affects price.
Self-hosted operations
Phoenix can run locally or be self-hosted, and Enterprise lists self-hosting. Budget your own infrastructure and operations; Arize does not list those costs here.
Enterprise contract terms
Enterprise pricing is custom, with custom spans, ingestion and retention. Confirm deployment, support, and any service commitments in the quote.
03Which plan should you buy?
| If you are… | Get | Why |
|---|---|---|
| Prototype or small project | AX Free | It costs $0 monthly and includes unlimited users and evaluations, within limits of 10 issues, 25k spans and 1 GB ingestion. |
| Production team within listed limits | AX Pro | At $50 per month, it lists 25 issues, 50k spans, 10 GB ingestion and 30-day retention. |
| Team with scaled AI workloads | AX Enterprise | It offers custom usage and retention, unlimited Signal issues, and SaaS or self-hosted deployment on custom pricing. |
04Is Arize AI worth the money?
AX Free is a useful starting point for evaluating instrumentation and workflows, provided 25,000 spans, 1 GB ingestion and 15-day retention are enough. AX Pro’s $50 monthly price adds more usage and 30-day retention, with no per-user or evaluation cap listed. For larger production workloads, Enterprise may fit because its usage and retention are custom, but the price is not published. Phoenix is the self-hostable route when you can operate the infrastructure and do not need AX’s managed workflows. Ask about overages, export and support before committing.
Arize AI pricing FAQ
Is Arize AI free?
AX Free costs $0 per month. It includes 10 issues, 25,000 spans, 1 GB ingestion and 15-day retention per month, plus unlimited users and evaluations. Phoenix is described as open source and local-first; check its repository for the licence and any applicable terms.
How much does AX Pro cost?
AX Pro is listed at $50 per month. It includes 25 issues, 50,000 spans, 10 GB ingestion and 30-day retention, with unlimited users and evaluations. Annual pricing is not published, so ask Arize whether annual billing is available.
Does Arize charge overages for usage above the limits?
The listed pricing does not state overage rates or explain what happens when a plan exceeds its issue, span or ingestion allowance. Ask Arize whether usage is stopped, throttled or billed at an additional rate before using a capped plan in production.
How much does AX Enterprise cost?
AX Enterprise uses custom pricing. Its listed terms include unlimited Signal issues, custom spans, ingestion and retention, and SaaS or self-hosted deployment. Request a quote that specifies expected usage, retention, deployment, support and any service commitments.