Arize AX

What it is for

Arize AX is a hosted Signal issues desk: you rank agent failures from production traces, and AX Free is $0 (no card; 10 Signal issues / month). Use it when the job is an issue list you start at a public $, not when you need a $20 chat seat.

What makes it unique: the cover is Arize’s official Signal desk (financial_agent, Jun 10 → Jun 17, Livefire, Online Evaluators 1, Issues Found 8, llm_response_generation 3 / guardrail_safety_check 2, Detected Issues #1 LLM invents specific financial claims… 69 matching traces, evidence trace1923907… / traceB36bcd8…) from the Observe still — not a pricing card. The rows themselves are ops of Signal.

Key features

• Signal — a ranked issue list Signal files from recurring trace failures (cover still; docs). One desk. Cover 8 issues / #1 / 69 traces sit here. Free is 10 issues / month; Pro is 25. Enable Signal / Mute / Mark as fixed sit here as CTAs, not a sixth desk.
• Traces — a searchable run you open from an issue’s evidence (docs). A span tree, not a Signal title. Cover trace IDs sit on Signal; the explorer is this desk.
• Evaluators — online / offline scores you attach to traces and datasets (docs; pricing). A judge, not an issue row. Cover Online Evaluators 1 is a count on Signal; the evaluator itself is this desk. Evals are unlimited on every printed tile.
• Experiments — a dataset run that compares a prompt / model / agent change (docs). A comparison, not a Signal fatal.
• Dashboards — charts you pin next to Signal (docs). A board, not the issue list.

Copy Issue Details / Add to Dataset / Create Evaluator / Open PR on the cover are CTAs (not desks). AX Free / Pro tiles are the meter. Alyx chat, MCP / ag CLI, and repo-backed fix PRs are AI extras / Enterprise extras, not a sixth desk we fold into Signal.

Who it's for

Best fit: agent / ML teams who will stay on AX Free at $0 (10 Signal issues, 25k spans, 1 GB, 15-day retention) while they open a first Signal list, then AX Pro at $50/month when they need 25 issues, 50k spans, or 30-day retention.

Pricing

Verified 2026-10-23 (Asia/Shanghai) from arize.com/pricing. Figures below are the printed USD tiles (AX Free / AX Pro / AX Enterprise).

• AX Free — $0. No card. 10 Signal issues / month. 25k trace spans / month. 1 GB ingestion. 15-day retention. SaaS. Unlimited users. Unlimited evals. 1 org / 1 space.
• AX Pro — $50/month. 25 Signal issues / month. 50k spans / month. 10 GB. 30-day retention. SaaS. Unlimited users. Unlimited evals. 1 org / 2 spaces. Standard SLA.
• AX Enterprise — custom. Unlimited Signal issues. Custom spans / storage / retention. SaaS or self-hosted. Repo-backed fix PRs. Custom AI provider. HIPAA / SSO / audit logs. Confirm the live quote.
• Arize Phoenix — open-source, local-first tracing / evals / experiments. Move to AX when you need the hosted Signal tile.
• Startup pricing — apply on the same page; not a printed dollar.

Confirm checkout; taxes follow your location. Signal and managed agents print as included (no extra meter) on the tiles we fetched.

Limitations / costs

• Free Signal caps at 10 issues / month (account-wide, UTC). A denser backlog is Pro $50 or Enterprise.
• Enterprise hid every dollar. Quote only Free $0 and Pro $50.
• A Signal issues desk, not Langfuse’s self-host traces. For that OSS desk see Langfuse.

Alternatives

• Langfuse — traces / evals you can self-host when you want Langfuse’s public Cloud $, not Arize’s Signal 8-issue still.
• LangSmith — a LangChain trace desk when you want LangSmith’s public $, not AX Pro $50.
• Phoenix — Arize’s own OSS local desk when you want Phoenix first, not hosted Signal.

Official tutorial

Official Arize AI channel video: Add Tracing to Any AI Agent in One Command | Arize AX (oEmbed author: Arize AI). First-party AX instrumentation walkthrough; the Signal still is the cover. Tracing on the video is ops of Traces, not generate-on-Signal. @ArizeAI / @arizeai resolve to the same official handle (also linked from arize.com).

Written path: arize.com/pricing plus the Signal still.

Website

https://arize.com

Repository

https://github.com/Arize-ai

Source

Catalog row curated for AI Tools Nav. Cover is Arize’s official Signal still (financial_agent + 8 issues + 69 matching traces + llm_response_generation). Dollars checked on arize.com/pricing (AX Free $0; AX Pro $50/mo; Enterprise quote). Tutorial oEmbed author: Arize AI.

Last verified

2026-10-23 (Asia/Shanghai) editorial check.