Arize AI
Observability & Evals · Free + paid
ML observability and monitoring platform
At a glance
- Made by
- Arize AI
- Korean
- None (English and a few others only)
- Available on
- Web, CLI
- Open source
- Open-source Phoenix and OpenInference provided (the license name is not listed on the page)
What is Arize AI?
Arize AX is a managed AI engineering platform from Arize AI that provides agent observability, evaluation, and improvement as a single workflow. Using the OpenInference and OpenTelemetry standards, it traces what an agent actually did, and runs span-, trace-, and session-level evaluations at scale. The Signal feature finds important issues and root causes and creates fixes you can review, and Alyx, an AI engineering agent, helps with running evaluations, debugging, and improvement. It also provides Phoenix, an open-source observability and evaluation tool.
- Agent tracing based on OpenInference
- Large-scale evaluation at the span, trace, and session level
- Test prompts and harnesses before deployment
- Signal: detects issues and root causes and generates fixes
- AI engineering agent Alyx
- Workflow integrating coding agents such as Cursor and Claude Code
- GenAI trace storage ADB
Who uses Arize AI and for what
- Agent development before release and debugging after release
- Real-time online evaluation during agent development
Pricing
What you get for free — Yes (AX Free: 25k spans/month, 1GB, 15-day retention, unlimited users)
| Plan | Price | Main limits |
|---|---|---|
| AX Free | $0/mo | 25k spans/month, 1GB, 15-day retention, 10 Signals/month |
| AX Pro | $50/mo | 50k spans/month, 10GB, 30-day retention, 25 Signals/month |
| AX Enterprise | Contact sales | Custom, SaaS or self-hosted |
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying. · Official pricing page
AI tools similar to Arize AI (alternatives)
Arize AI vs. alternatives at a glance
| AI | Pricing | Combos on the map | Connected tools | Free | Cheapest monthly | Korean |
|---|---|---|---|---|---|---|
| Arize AI | Free + paid | 0 | 3 | Yes | $50/mo | No |
| Evidently | Free + paid | 0 | 3 | Yes | — | No |
| Fiddler AI | Free + paid | 0 | 3 | Yes | — | No |
3 of these 3 tools have a free plan. Cheapest paid plan: Arize AI ($50/mo).
Combo and connection counts are based on the relationships recorded on AI Galaxy Map (2026-10-26); they are not a quality ranking.
Arize AI on AI Galaxy Map
- One of 27 AI tools in the Observability & Evals field.
- Connected to 3 other tools — #20 in its field.
Frequently asked questions
Can I use Arize AI for free?
Yes (AX Free: 25k spans/month, 1GB, 15-day retention, unlimited users). Prices can change, so check the official site before paying.
What AI can I use instead of Arize AI?
Tools that do the same job, such as Evidently, Fiddler AI, WhyLabs, are connected to it on the map.
Can I use Arize AI in Korean?
None (English and a few others only)
Sources (official pages)
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying.