Freemium
Added on Nov 09,2026
Arize AX is an AI engineering platform from Arize AI that gives teams observability and evaluation tools to understand and improve the performance of AI agents in production.
It is built around turning production behaviour into better agents, with agents helping to find issues, review traces and generate fixes rather than relying only on humans reading dashboards.
Key features include Signal, which surfaces important issues, uncovers root causes and generates review-ready fixes; Managed Agents, with templates to investigate failing traces, fix a bug in your repo or automate recurring checks; and Swarm Observability for tracking status and performance across many agents in real time.
Evaluation uses an Agent-as-a-Judge approach that learns from agent telemetry to create evals, alongside online evals on traces and spans, offline evals on datasets, session evals for multi-turn conversations and human annotation with labelling queues.
It also offers experiments, playgrounds, prompt versioning and serving, trace replay, custom dashboards and monitors, token, latency and cost tracking, and multi-modal tracing for image, voice and PDF. It is OpenTelemetry compliant.
Pricing: AX Free costs nothing and includes 25k spans and 1 GB of ingestion a month with 15-day retention and unlimited users. AX Pro is $50 per month with 50k spans, 10 GB and 30-day retention. AX Enterprise has custom pricing with SaaS or self-hosted deployment. Startup pricing is available, and Arize Phoenix is offered as an open-source, local-first alternative.
It is suited to AI engineering teams and enterprises building and running LLM applications and agent systems that need tracing, evals and continuous improvement.
By the PowerfulAI.tools Editorial Team · Updated 10 November 2026 · Researched with AI assistance and checked against the official Arize AX website · How we review tools
AX Free costs $0 with 25k spans and 10 Signal issues a month; AX Pro is $50 per month with 50k spans, 10 GB ingestion and 30-day retention, and Enterprise is custom.
Pricing checked against the official Arize AX website in November 2026. Prices can change, so confirm before you buy.
AI engineering teams who need to trace, evaluate and improve LLM agents running in production.
Phoenix is Arize's open-source, local-first platform for tracing, evals and prompt iteration, while AX is the managed platform. Arize suggests starting with Phoenix and moving to AX when you need it.
All plans list a choice of US, EU or CA data regions. SOC 2 Type II and GDPR are listed from the Pro plan, and HIPAA on Enterprise.
Popular alternatives to Arize AX include Pollinations, NemoClaw and Agnes AI. Compare their pricing and what each is best for below.
| Tool | Pricing | Best for |
|---|---|---|
| Pollinations | Freemium | Developers and hobby builders who want a single API for adding AI images, audio and text to their websites, bots and app... |
| NemoClaw | Free | Developers and platform teams who want to run always-on AI agents on NVIDIA hardware under policy-based security control... |
| Agnes AI | Freemium | Developers building AI-powered apps who want access to several models through one API. |
| OrcaRouter | Freemium | Developers and teams who want to balance AI quality and cost across many models. |
| DiagramGPT | Free | Developers and students who need to sketch system designs and workflows quickly by describing them in words. |
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