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Paid plans start at $50/mo. There's also a free plan.
Arize AI starts at $0 with AX Free. The paid AX Pro plan is listed at $50 per month, with no annual price published. AX Free includes 25,000 spans and 1 GB of monthly ingestion; Pro raises those caps to 50,000 spans and 10 GB. Both plans limit issues and retention, even though users and evaluations are unlimited. Enterprise pricing is not published, and its span, ingestion, and retention allowances are custom. Phoenix is open source and can run locally or self-hosted.
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
Span limits
AX Free includes 25,000 spans per month; AX Pro includes 50,000. The pricing page gives no overage rate.
Monthly ingestion caps
The plans list 1 GB per month on Free and 10 GB on Pro. The page does not publish extra-ingestion pricing.
Issue and retention caps
Free allows 10 issues monthly and 15-day retention; Pro allows 25 issues and 30-day retention. Higher allowances are not priced publicly.
Enterprise pricing
Enterprise lists custom span volume, ingestion, and retention, but no price. Ask Arize for a quote before budgeting at scale.
03Which plan should you buy?
| If you are… | Get | Why |
|---|---|---|
| Builders evaluating agents | AX Free | It costs $0 and includes unlimited users and evals, but caps monthly spans at 25,000 and ingestion at 1 GB. |
| AI-native teams within caps | AX Pro | At $50 per month, it doubles the Free span allowance and raises ingestion to 10 GB, with 30-day retention. |
| Teams with scaled AI use | AX Enterprise | It offers custom volumes and retention plus SaaS or self-hosted deployment; pricing is not published. |
04Is Arize AI worth the money?
Arize’s listed plans make the initial cost easy to read: free to start, then $50 monthly for AX Pro. The harder question is whether your workload fits its issue, span, ingestion, and retention limits. Pro may suit teams whose needs stay within those published caps, but the page gives no overage rates or annual price to help model growth. Enterprise adds custom limits and deployment options, but requires a quote. Phoenix is an open-source alternative for teams able to run it locally or self-host it.
Arize AI pricing FAQ
How much does Arize AI cost?
The pricing page lists AX Free at $0 per month and AX Pro at $50 per month. It does not publish an AX Enterprise price. The page also does not list annual billing prices, so we can’t compare monthly and annual payment costs from the published information.
What does the Arize AI free plan include?
AX Free includes 10 issues per month, 25,000 spans per month, 1 GB of monthly ingestion, and 15-day retention. The plan lists unlimited users and evaluations. Those usage and retention limits are the main constraints to check against your workload.
What are the AX Pro limits?
AX Pro is listed at $50 per month and includes 25 issues monthly, 50,000 spans monthly, 10 GB of monthly ingestion, and 30-day retention. It also lists unlimited users and evaluations. The pricing page does not publish overage rates or annual pricing.
Is Arize AI available as open-source or self-hosted?
Arize offers Phoenix, an open-source platform for tracing AI applications, evaluations, and failure investigation that can run locally or be self-hosted. The AX Enterprise plan also lists SaaS or self-hosted deployment. The published pricing details do not give a separate Phoenix price or an Enterprise quote.