Arize AI
arize.com
ML and LLM observability and evaluation platform.
Quick Information
- Category:
- MLOps & Infrastructure
- Pricing:
- Freemium
- Platforms:
- Web, Cloud, Self-hosted
- Free Plan:
- Yes
- API Available:
- Yes
- Last Verified:
- October 2026
What Is Arize AI?
Arize AI is an ML and LLM observability and evaluation platform with an open-source option. Third-party 2026 reviews describe four tiers, none confirmed on Arize's own page. Phoenix is the free open-source option you can self-host, run locally, in Docker or on Kubernetes, with no usage caps; its licence is Elastic 2.0, which is source-available rather than OSI-approved. AX Free costs $0 and covers 25,000 spans and 1 GB of ingestion per month with 15-day retention. AX Pro is $50 a month for 50,000 spans, 10 GB of ingestion and 30-day retention. AX Enterprise is custom-quoted and adds configurable retention, an uptime SLA, SOC 2, HIPAA and dedicated support.
Overage detail is uncertain. RFP.wiki lists $0.0008 per span and $3 per extra GB on Pro, but UsagePricing says Arize's July 2026 pricing page redesign removed the published overage rates, so treat those as unverifiable. Enterprise estimates vary: Cekura cites a median buyer paying about $60,000 a year, while Voiceflow cites third-party data putting typical contracts between $50,000 and $100,000. A costbench listing refers to plans from free to $50 per user, which may reflect a different structure. If the licence matters to you, note that Phoenix's Elastic 2.0 terms restrict offering it as a managed service.
Arize suits ML and AI engineering teams who want tracing, evaluation and drift monitoring in one place. Compare Evidently AI, Fiddler AI and Comet. Browse the MLOps & Infrastructure tools directory for more.
What Can You Use Arize AI For?
LLM tracing and evaluation
Phoenix and AX.
Model drift monitoring
ML observability.
Arize AI Features
- Phoenix open source — Elastic 2.0.
- Span-based quotas — Free and Pro.
- Enterprise compliance — SOC 2, HIPAA.
Who Is Arize AI For?
- AI engineering teams — Tracing.
- Enterprises — Compliance.
Arize AI Pros & Limitations
What We Like
- Free self-hosted option
- Clear entry tiers
- Enterprise compliance
Limitations
- Phoenix licence is source-available
- Overage rates unclear
- Enterprise costs high
Arize AI Pricing
| Plan | Price | Main Features |
|---|---|---|
| Phoenix (open source) | Free (Elastic 2.0) | Self-host; no usage caps |
| AX Free | $0 | 25,000 spans, 1 GB/month, 15-day retention |
| AX Pro | $50/month | 50,000 spans, 10 GB, 30-day retention; overage rates disputed |
| AX Enterprise | Custom (estimates $50,000-$100,000/year) | SLA, SOC 2, HIPAA, dedicated support |
Pricing was last verified October 2026. Check the official website for the latest pricing.
AI Listing Jungle Ranking
- Global Rank:
- #830
- Overall Score:
- 50.9/100
- Monthly Users:
- –
- Rank Change:
- ▲ 747
This ranking reflects AI Listing Jungle's own independent scoring methodology and is not an endorsement by Arize AI or its company. How Our Rankings Work
Frequently Asked Questions
Is Phoenix free?
Yes, under Elastic 2.0.
How much is AX Pro?
$50 a month.
Free tier limits?
25,000 spans and 1 GB a month.
Enterprise price?
Custom, roughly $50K-$100K a year per estimates.
Our Take
A strong observability suite with a generous free tier.
Check overage pricing.
Arize AI Alternatives
Arize AI Comparisons
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